/* ============================================================
   KANGDIEN — Corporate Website Stylesheet
   Wuxi Kangdien (KD) Technology Co., Ltd.
   Organised: 1 tokens · 2 base · 3 utilities · 4 header/nav
   5 hero · 6 sections/cards · 7 pages · 8 forms · 9 footer
   10 responsive · 11 motion/accessibility
   ============================================================ */

/* ---------- 1. Design tokens ---------- */
:root {
  --kd-red: #E52B20;
  --kd-red-dark: #B81F16;
  --kd-dark: #10161D;
  --kd-charcoal: #161D24;
  --kd-white: #FFFFFF;
  --kd-offwhite: #FAF8F4;
  --kd-gray: #5C6672;
  --kd-gray-light: #F1F3F5;
  --kd-border: #E2E6EA;

  --font-body: "Inter", -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Manrope", "Inter", -apple-system, "Segoe UI", Roboto, sans-serif;

  --radius: 8px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px rgba(16, 22, 29, 0.06);
  --shadow-md: 0 6px 24px rgba(16, 22, 29, 0.08);
  --shadow-lg: 0 18px 48px rgba(16, 22, 29, 0.14);

  --header-h: 76px;
  --container: 1200px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overflow-x: clip;               /* guarantee: no horizontal overflow */
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  overflow-x: clip;               /* guarantee: no horizontal overflow */
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--kd-dark);
  background: var(--kd-white);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--kd-dark);
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.65rem, 3.2vw, 2.5rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.05rem; }

p { margin: 0 0 1em; }

a { color: var(--kd-red); text-decoration: none; }
a:hover { color: var(--kd-red-dark); }

img, svg, video {
  max-width: 100%;                /* guarantee: no horizontal overflow */
  height: auto;
  display: block;
}

ul, ol { margin: 0 0 1em; padding-left: 1.25em; }

:focus-visible {
  outline: 3px solid var(--kd-red);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Screen-reader only */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Skip link */
.skip-link {
  position: absolute; top: -60px; left: 16px; z-index: 2000;
  background: var(--kd-dark); color: var(--kd-white);
  padding: 10px 18px; border-radius: var(--radius-sm);
  font-weight: 600; transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; color: var(--kd-white); }

/* ---------- 3. Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section { padding: 88px 0; }
.section--tight { padding: 56px 0; }
.section--gray { background: var(--kd-gray-light); }
.section--offwhite { background: var(--kd-offwhite); }
.section--dark { background: var(--kd-charcoal); color: #E8ECF0; }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--kd-white); }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--kd-red); margin-bottom: 16px;
}
.eyebrow--light { color: #FF6B61; }

.section-header { max-width: 760px; margin-bottom: 48px; }
.section-header--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-header p.lead, p.lead { font-size: 1.1rem; color: var(--kd-gray); }
.section--dark p.lead { color: #B9C2CC; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 30px;
  background: var(--kd-red); color: var(--kd-white);
  font-family: var(--font-heading); font-weight: 700; font-size: 0.95rem;
  letter-spacing: 0.02em;
  border: 1px solid var(--kd-red); border-radius: var(--radius-sm);
  cursor: pointer; transition: background 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
  white-space: nowrap;
}
.btn:hover { background: var(--kd-red-dark); border-color: var(--kd-red-dark); color: var(--kd-white); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }

.btn-outline {
  background: transparent; color: var(--kd-white);
  border: 1px solid rgba(255, 255, 255, 0.85);
}
.btn-outline:hover { background: var(--kd-white); color: var(--kd-dark); border-color: var(--kd-white); }

.btn-light {
  background: var(--kd-white); color: var(--kd-dark); border-color: var(--kd-white);
}
.btn-light:hover { background: var(--kd-gray-light); border-color: var(--kd-gray-light); color: var(--kd-dark); }

.btn .arr { font-weight: 700; }

/* Grid helpers */
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 4. Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: var(--kd-white);
  border-bottom: 1px solid var(--kd-border);
  transition: box-shadow 0.25s var(--ease);
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(16, 22, 29, 0.10); }

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; height: var(--header-h);
}

/* Logo */
.logo {
  display: inline-flex;
  align-items: stretch;
  gap: 16px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-mark-wrap {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  flex-shrink: 0;
}
.logo-mark-svg {
  width: 40px;
  height: 40px;
  color: var(--kd-red);
  display: block;
}
.logo-word {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--kd-red);
  line-height: 1;
  text-align: center;
}
.logo-text-block {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1px 0;
}
.logo-chinese {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  font-weight: 700;
  font-size: 1.16rem;
  line-height: 1.05;
  color: var(--kd-dark);
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.logo-english {
  font-family: var(--font-heading, "Outfit", sans-serif);
  font-weight: 600;
  font-size: 0.71rem;
  line-height: 1;
  color: #334155;
  letter-spacing: 0.025em;
  white-space: nowrap;
}
.logo--white {
  color: var(--kd-white);
}
.logo--white .logo-mark-svg {
  color: var(--kd-white);
}
.logo--white .logo-word {
  color: var(--kd-white);
}
.logo--white .logo-chinese {
  color: var(--kd-white);
}
.logo--white .logo-english {
  color: #CBD5E1;
}

/* Desktop nav */
.main-nav { display: none; }
.nav-list {
  display: flex; align-items: center; gap: 6px;
  list-style: none; margin: 0; padding: 0;
}
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 12px 14px;
  font-weight: 600; font-size: 0.98rem; color: var(--kd-dark);
}
.nav-link:hover, .nav-link.active { color: var(--kd-red); }
.nav-link .chev { width: 12px; height: 12px; transition: transform 0.2s var(--ease); }
.dropdown-toggle {
  background: none; border: 0; padding: 12px 6px 12px 0;
  cursor: pointer; color: inherit; display: inline-flex; align-items: center;
}
.dropdown-toggle .chev { width: 14px; height: 14px; transition: transform 0.2s var(--ease); }
.dropdown-toggle[aria-expanded="true"] .chev { transform: rotate(180deg); }

/* Dropdown panel */
.dropdown {
  position: absolute; top: calc(100% + 6px); left: 0;
  min-width: 250px;
  background: var(--kd-white);
  border: 1px solid var(--kd-border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  list-style: none; margin: 0; padding: 10px;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
}
.nav-item:hover > .dropdown,
.nav-item:focus-within > .dropdown,
.dropdown-toggle[aria-expanded="true"] + .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block; padding: 10px 14px; border-radius: var(--radius-sm);
  color: var(--kd-dark); font-weight: 500; font-size: 0.95rem;
  white-space: nowrap;
}
.dropdown a:hover { background: var(--kd-gray-light); color: var(--kd-red); }

/* Header actions */
.header-actions { display: none; align-items: center; gap: 14px; }
.lang-switcher { display: inline-flex; border: 1px solid var(--kd-border); border-radius: 999px; overflow: hidden; }
.lang-switcher button {
  border: 0; background: transparent; padding: 8px 14px;
  font-family: var(--font-heading); font-weight: 700; font-size: 0.8rem; letter-spacing: 0.06em;
  color: var(--kd-gray); cursor: pointer;
}
.lang-switcher button[aria-current="true"] { background: var(--kd-dark); color: var(--kd-white); }

/* Hamburger */
.hamburger {
  display: inline-flex; flex-direction: column; justify-content: center; gap: 6px;
  width: 46px; height: 46px; padding: 0 11px;
  background: transparent; border: 1px solid var(--kd-border); border-radius: var(--radius-sm);
  cursor: pointer;
}
.hamburger span { display: block; height: 2px; width: 100%; background: var(--kd-dark); border-radius: 2px; transition: transform 0.25s var(--ease), opacity 0.25s; }

/* Mobile drawer */
.drawer-backdrop {
  position: fixed; inset: 0; z-index: 1090;
  background: rgba(16, 22, 29, 0.5);
  opacity: 0; visibility: hidden; transition: opacity 0.3s var(--ease), visibility 0.3s;
}
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 1100;
  width: min(360px, 88vw);
  background: var(--kd-white);
  box-shadow: var(--shadow-lg);
  transform: translateX(102%);
  transition: transform 0.32s var(--ease);
  display: flex; flex-direction: column;
  overflow-y: auto;
}
body.drawer-open { overflow: hidden; }
body.drawer-open .drawer { transform: translateX(0); }
body.drawer-open .drawer-backdrop { opacity: 1; visibility: visible; }
.drawer-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px; border-bottom: 1px solid var(--kd-border);
}
.drawer-close {
  background: none; border: 1px solid var(--kd-border); border-radius: var(--radius-sm);
  width: 40px; height: 40px; font-size: 1.2rem; cursor: pointer; color: var(--kd-dark);
  display: inline-flex; align-items: center; justify-content: center;
}
.drawer-nav { padding: 12px 22px 24px; }
.drawer-nav ul { list-style: none; margin: 0; padding: 0; }
.drawer-item { border-bottom: 1px solid var(--kd-border); }
.drawer-row { display: flex; align-items: center; justify-content: space-between; }
.drawer-link {
  display: block; padding: 14px 0; font-weight: 700; font-size: 1.02rem; color: var(--kd-dark);
  font-family: var(--font-heading);
}
.drawer-link:hover { color: var(--kd-red); }
.drawer-toggle {
  background: none; border: 0; width: 44px; height: 48px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; color: var(--kd-gray);
}
.drawer-toggle .chev { width: 16px; height: 16px; transition: transform 0.25s var(--ease); }
.drawer-toggle[aria-expanded="true"] .chev { transform: rotate(180deg); }
.drawer-sub { display: none; padding: 0 0 12px 4px; }
.drawer-sub.open { display: block; }
.drawer-sub a {
  display: block; padding: 9px 0; color: var(--kd-gray); font-weight: 500;
  border-left: 2px solid var(--kd-border); padding-left: 14px; margin-left: 2px;
}
.drawer-sub a:hover { color: var(--kd-red); border-color: var(--kd-red); }
.drawer-foot { padding: 0 22px 28px; display: grid; gap: 14px; }
.drawer-foot .btn { width: 100%; }
.drawer-lang { display: flex; justify-content: center; }

/* ---------- 5. Hero ---------- */
.hero {
  position: relative; overflow: clip;
  display: flex; align-items: center;
  min-height: 560px;
  color: var(--kd-white);
  background: var(--kd-dark);
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0;
  /* legibility overlay only — not decorative */
  background: linear-gradient(100deg, rgba(10, 14, 20, 0.78) 0%, rgba(10, 14, 20, 0.55) 45%, rgba(10, 14, 20, 0.18) 100%);
}
.hero-content { position: relative; z-index: 2; padding: 96px 0; max-width: 720px; }
.hero .eyebrow { color: #FFD9D5; }
.hero h1 { color: var(--kd-white); margin-bottom: 20px; }
.hero-sub { font-size: 1.12rem; color: rgba(255, 255, 255, 0.88); max-width: 600px; margin-bottom: 34px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; }

/* Inner page hero */
.hero--page { min-height: 340px; }
.hero--page .hero-content { padding: 72px 0; }
.hero--page h1 { font-size: clamp(2rem, 4.4vw, 3rem); }

/* Breadcrumb */
.breadcrumb { padding: 18px 0 0; font-size: 0.88rem; color: var(--kd-gray); }
.breadcrumb ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: #B9C2CC; }
.breadcrumb a { color: var(--kd-gray); font-weight: 500; }
.breadcrumb a:hover { color: var(--kd-red); }
.breadcrumb [aria-current="page"] { color: var(--kd-dark); font-weight: 600; }

/* ---------- 6. Cards & sections ---------- */

/* Metric strip */
.metric-strip {
  background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
  border-top: 1px solid var(--kd-border);
  border-bottom: 1px solid var(--kd-border);
  padding: 54px 0 60px;
  margin-top: 36px;
}
.metric-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 36px;
}
.metric-strip-title {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 2.4vw, 1.95rem);
  font-weight: 800;
  color: var(--kd-dark);
  margin: 0 0 8px;
}
.metric-strip-sub {
  font-size: 0.92rem;
  color: var(--kd-gray);
  line-height: 1.5;
  margin: 0;
}
.metric-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 640px) {
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .metric-grid { grid-template-columns: repeat(4, 1fr); gap: 20px; }
}
.metric-tile {
  background: var(--kd-white);
  border: 1px solid var(--kd-border);
  border-radius: var(--radius);
  padding: 26px 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.28s var(--ease);
}
.metric-tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(229, 43, 32, 0.3);
}
.metric-tile-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.metric-num-badge {
  font-family: var(--font-heading);
  font-size: 0.76rem;
  font-weight: 800;
  color: #94A3B8;
  letter-spacing: 0.06em;
}
.metric-icon-wrap {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: #FFF1F0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--kd-red);
}
.metric-value {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--kd-red);
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin-bottom: 6px;
}
.metric-label {
  font-family: var(--font-heading);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--kd-dark);
  margin-bottom: 6px;
}
.metric-desc {
  font-size: 0.82rem;
  color: var(--kd-gray);
  line-height: 1.45;
  margin: 0;
  flex-grow: 1;
}

/* Service cards */
.service-card {
  background: var(--kd-white);
  border: 1px solid var(--kd-border); border-radius: var(--radius);
  padding: 30px 28px;
  display: flex; flex-direction: column; gap: 14px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s;
}
.service-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: #D3D9DF; }
.service-icon {
  width: 56px; height: 56px; border-radius: 12px;
  background: var(--kd-gray-light);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--kd-red);
}
.service-icon svg { width: 30px; height: 30px; }
.service-card h3 { margin: 0; font-size: 1.18rem; }
.service-card h3 a { color: var(--kd-dark); }
.service-card h3 a:hover { color: var(--kd-red); }
.service-card p { color: var(--kd-gray); font-size: 0.96rem; margin: 0; flex: 1; }
.card-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 0.92rem; color: var(--kd-red);
  margin-top: 6px;
}
.card-link .arr { transition: transform 0.2s var(--ease); }
.card-link:hover .arr { transform: translateX(4px); }
.card-link:hover { color: var(--kd-red-dark); }

/* Project cards */
.project-card {
  background: var(--kd-white);
  border: 1px solid var(--kd-border); border-radius: var(--radius);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.project-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.project-media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--kd-gray-light); }
.project-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s var(--ease); }
.project-card:hover .project-media img { transform: scale(1.04); }
.project-cat {
  position: absolute; top: 14px; left: 14px;
  background: rgba(16, 22, 29, 0.82); color: var(--kd-white);
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px;
}
.project-body { padding: 24px 24px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.project-body h3 { margin: 0; font-size: 1.15rem; }
.project-body h3 a { color: var(--kd-dark); }
.project-body h3 a:hover { color: var(--kd-red); }
.project-meta { font-size: 0.86rem; color: var(--kd-gray); margin: 0; }
.project-body p.desc { color: var(--kd-gray); font-size: 0.95rem; margin: 0; flex: 1; }

/* Blog cards */
.blog-card {
  background: var(--kd-white);
  border: 1px solid var(--kd-border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.blog-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.blog-media { aspect-ratio: 16 / 9; overflow: hidden; background: var(--kd-gray-light); }
.blog-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s var(--ease); }
.blog-card:hover .blog-media img { transform: scale(1.04); }
.blog-body { padding: 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.blog-kicker { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--kd-red); }
.blog-body h3 { margin: 0; font-size: 1.12rem; line-height: 1.4; }
.blog-body h3 a { color: var(--kd-dark); }
.blog-body h3 a:hover { color: var(--kd-red); }
.blog-body p { color: var(--kd-gray); font-size: 0.95rem; margin: 0; flex: 1; }
.blog-meta { font-size: 0.84rem; color: var(--kd-gray); }

/* Case study cards */
.case-card {
  background: var(--kd-white);
  border: 1px solid var(--kd-border); border-radius: var(--radius);
  padding: 32px 30px;
  display: flex; flex-direction: column; gap: 12px;
  border-top: 3px solid var(--kd-red);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.case-card h3 { margin: 0; font-size: 1.2rem; }
.case-card h3 a { color: var(--kd-dark); }
.case-card h3 a:hover { color: var(--kd-red); }
.case-card p { color: var(--kd-gray); font-size: 0.96rem; margin: 0; flex: 1; }

/* Editorial feature (split) */
.split { display: grid; gap: 40px; align-items: center; }
.split-media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.split-media img { width: 100%; height: 100%; object-fit: cover; }
.split-body .tag {
  display: inline-block; font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--kd-red); margin-bottom: 14px;
}
.check-list { list-style: none; margin: 22px 0; padding: 0; display: grid; gap: 12px; }
.check-list li {
  display: flex; gap: 12px; align-items: flex-start;
  color: var(--kd-dark); font-weight: 500;
}
.check-list .tick {
  flex-shrink: 0; width: 22px; height: 22px; margin-top: 2px;
  border-radius: 50%; background: var(--kd-red); color: var(--kd-white);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 800;
}

/* CTA band */
.cta-band {
  background: var(--kd-charcoal);
  color: var(--kd-white);
  text-align: center;
  padding: 96px 0;
  position: relative; overflow: clip;
}
.cta-band h2 { color: var(--kd-white); max-width: 760px; margin-left: auto; margin-right: auto; }
.cta-band p { color: #B9C2CC; max-width: 640px; margin: 0 auto 32px; }

/* Filter buttons */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; align-items: center; }
.filter-label { font-weight: 700; font-size: 0.9rem; color: var(--kd-gray); margin-right: 6px; }
.filter-btn {
  border: 1px solid var(--kd-border); background: var(--kd-white);
  padding: 9px 18px; border-radius: 999px;
  font-family: var(--font-heading); font-weight: 600; font-size: 0.88rem;
  color: var(--kd-dark); cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.filter-btn:hover { border-color: var(--kd-red); color: var(--kd-red); }
.filter-btn.active { background: var(--kd-red); border-color: var(--kd-red); color: var(--kd-white); }

/* Gallery */
.gallery-grid { display: grid; gap: 18px; grid-template-columns: 1fr; }
.gallery-grid figure { margin: 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--kd-border); }
.gallery-grid img { width: 100%; height: 240px; object-fit: cover; transition: transform 0.5s var(--ease); }
.gallery-grid figure:hover img { transform: scale(1.04); }

/* Pagination */
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 48px; }
.pagination a, .pagination span.page {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 44px; height: 44px; padding: 0 14px;
  border: 1px solid var(--kd-border); border-radius: var(--radius-sm);
  font-weight: 600; color: var(--kd-dark); background: var(--kd-white);
}
.pagination a:hover { border-color: var(--kd-red); color: var(--kd-red); }
.pagination span.page.current { background: var(--kd-red); border-color: var(--kd-red); color: var(--kd-white); }
.pagination .disabled { opacity: 0.45; pointer-events: none; }

/* ---------- 7. Detail / article pages ---------- */
.prose { max-width: 800px; }
.prose p { margin-bottom: 1.1em; }
.prose h2 { margin-top: 2em; }
.detail-grid { display: grid; gap: 48px; }
.detail-main { min-width: 0; }
.detail-side { display: grid; gap: 24px; align-content: start; }
.fact-card {
  background: var(--kd-gray-light); border-radius: var(--radius);
  padding: 26px; border: 1px solid var(--kd-border);
}
.fact-card h3 { font-size: 1rem; margin-bottom: 14px; }
.fact-row { display: grid; grid-template-columns: 110px 1fr; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--kd-border); font-size: 0.93rem; }
.fact-row:last-child { border-bottom: 0; }
.fact-row dt { color: var(--kd-gray); font-weight: 600; }
.fact-row dd { margin: 0; color: var(--kd-dark); }

.meta-line { color: var(--kd-gray); font-size: 0.92rem; margin-bottom: 20px; }
.meta-line .dot { margin: 0 8px; color: #B9C2CC; }

.bullet-list { list-style: none; padding: 0; margin: 0 0 1.2em; display: grid; gap: 10px; }
.bullet-list li { position: relative; padding-left: 22px; }
.bullet-list li::before { content: ""; position: absolute; left: 2px; top: 0.62em; width: 8px; height: 8px; border-radius: 50%; background: var(--kd-red); }

.job-card {
  border: 1px solid var(--kd-border); border-radius: var(--radius);
  padding: 30px; background: var(--kd-white);
  display: grid; gap: 12px;
}
.job-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.job-tag {
  font-size: 0.8rem; font-weight: 600; color: var(--kd-gray);
  background: var(--kd-gray-light); border-radius: 999px; padding: 5px 13px;
}

/* ---------- 8. Forms ---------- */
.contact-grid { display: grid; gap: 48px; }
.form-card {
  background: var(--kd-white); border: 1px solid var(--kd-border);
  border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow-sm);
}
.form-card h2 { font-size: 1.5rem; margin-bottom: 8px; }
.form-card > p { color: var(--kd-gray); margin-bottom: 26px; }
.field { margin-bottom: 20px; }
.field label { display: block; font-weight: 600; font-size: 0.94rem; margin-bottom: 8px; color: var(--kd-dark); }
.req { color: var(--kd-red); font-weight: 700; }
.form-control {
  width: 100%; padding: 13px 15px;
  border: 1px solid var(--kd-border); border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.98rem; color: var(--kd-dark);
  background: var(--kd-white);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-control:focus { outline: none; border-color: var(--kd-red); box-shadow: 0 0 0 3px rgba(229, 43, 32, 0.14); }
textarea.form-control { resize: vertical; min-height: 150px; }
.field-error { color: var(--kd-red-dark); font-size: 0.86rem; margin-top: 6px; font-weight: 500; }
.field-error-list { list-style: none; margin: 6px 0 0; padding: 0; }
.form-errors {
  background: #FDECEA; border: 1px solid #F5C2BC; color: #8F1D14;
  border-radius: var(--radius-sm); padding: 16px 18px; margin-bottom: 24px;
  font-size: 0.94rem;
}
.form-errors ul { margin: 8px 0 0; padding-left: 1.2em; }
/* Honeypot: invisible to humans, present for bots */
.hp-field, .hp-wrap { display: none !important; visibility: hidden !important; }

.office-card {
  border: 1px solid var(--kd-border); border-radius: var(--radius);
  padding: 28px; background: var(--kd-white);
  display: grid; gap: 10px; align-content: start;
}
.office-card h3 { margin: 0 0 4px; }
.office-row { display: flex; gap: 10px; align-items: flex-start; color: var(--kd-gray); font-size: 0.95rem; }
.office-row strong { color: var(--kd-dark); font-weight: 600; min-width: 64px; }
.office-row a { color: var(--kd-dark); }
.office-row a:hover { color: var(--kd-red); }

/* Thank-you */
.thankyou { text-align: center; max-width: 640px; margin: 0 auto; }
.thankyou .big-tick {
  width: 84px; height: 84px; margin: 0 auto 26px; border-radius: 50%;
  background: var(--kd-red); color: var(--kd-white);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 2.2rem; font-weight: 800;
}

/* ---------- 9. Footer ---------- */
.footer-wave { display: block; width: 100%; height: 70px; margin-bottom: -1px; background: var(--kd-white); }
.site-footer { background: var(--kd-charcoal); color: #C6CDD4; }
.footer-main { padding: 64px 0 48px; }
.footer-grid { display: grid; gap: 40px; grid-template-columns: 1fr; }
.footer-brand .logo,
.logo--vertical {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 20px;
}
.logo--vertical .logo-mark-wrap {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
}
.footer-brand .logo .logo-mark-svg,
.logo--vertical .logo-mark-svg {
  width: 48px;
  height: 48px;
  color: var(--kd-white);
}
.footer-brand .logo .logo-word,
.logo--vertical .logo-word {
  color: var(--kd-white);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  line-height: 1;
}
.footer-brand .logo .logo-text-block,
.logo--vertical .logo-text-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-brand .logo .logo-chinese,
.logo--vertical .logo-chinese {
  color: var(--kd-white);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.footer-brand .logo .logo-english,
.logo--vertical .logo-english {
  color: #CBD5E1;
  font-size: 0.70rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.footer-brand p { font-size: 0.95rem; color: #AEB6BF; max-width: 320px; }
.footer-col h4 {
  color: var(--kd-white); font-size: 0.86rem; font-weight: 800;
  letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 20px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.footer-col a { color: #C6CDD4; font-size: 0.94rem; display: inline-flex; align-items: baseline; gap: 9px; }
.footer-col a:hover { color: var(--kd-white); }
.flink-arrow { color: var(--kd-red); font-weight: 800; font-size: 0.9em; }
.social-row { display: flex; gap: 12px; margin-top: 22px; }
.social-btn {
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--kd-white); transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}
.social-btn:hover { background: var(--kd-red); color: var(--kd-white); transform: translateY(-2px); }
.social-btn svg { width: 20px; height: 20px; }

/* Contact column in footer */
.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.88rem;
  line-height: 1.45;
  color: #C6CDD4;
}
.fcontact-icon {
  width: 20px;
  height: 20px;
  min-width: 20px;
  margin-top: 2px;
  color: var(--kd-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.fcontact-icon svg {
  width: 17px;
  height: 17px;
}
.fcontact-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.fcontact-details strong {
  color: var(--kd-white);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: -0.01em;
}
.fcontact-details span {
  color: #94A3B8;
  font-size: 0.84rem;
  line-height: 1.35;
}
.fcontact-link {
  color: #C6CDD4;
  text-decoration: none;
  font-size: 0.90rem;
  transition: color 0.2s;
}
.fcontact-link:hover {
  color: var(--kd-white);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  padding: 22px 0;
  display: flex; flex-direction: column; gap: 14px; align-items: center; text-align: center;
  font-size: 0.88rem; color: #8E979F;
}
.footer-legal { display: flex; flex-wrap: wrap; gap: 8px 22px; justify-content: center; }
.footer-legal a { color: #C6CDD4; display: inline-flex; align-items: baseline; gap: 8px; }
.footer-legal a:hover { color: var(--kd-white); }
.dev-credit a { color: #7FB3FF; text-decoration: underline; text-underline-offset: 3px; }
.dev-credit a:hover { color: #A9CCFF; }

/* ---------- 10. Responsive ---------- */
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .split { grid-template-columns: 1fr 1fr; gap: 64px; }
  .split--flip .split-media { order: 2; }
  .contact-grid { grid-template-columns: 1.25fr 1fr; align-items: start; }
  .detail-grid { grid-template-columns: 1fr 340px; }
  .footer-grid { grid-template-columns: 1.45fr repeat(4, 0.95fr) 1.35fr; gap: 28px; }
}

@media (min-width: 1024px) {
  .main-nav { display: block; }
  .header-actions { display: inline-flex; }
  .hamburger { display: none; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .footer-bottom { flex-direction: row; justify-content: space-between; text-align: left; }
}

@media (min-width: 1280px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .section { padding: 110px 0; }
}

@media (max-width: 1023.98px) {
  .nav-desktop-only { display: none !important; }
}

/* ---------- 11. Motion & accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .drawer, .drawer-backdrop, .cta-band, .site-footer, .filter-bar { display: none; }
}

/* ---------- 12. Video Modal & Hero Play Button ---------- */
.btn-hero-video {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px 12px;
  color: var(--kd-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  transition: transform 0.2s var(--ease), opacity 0.2s;
}
.btn-hero-video:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}
.hero-play-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--kd-white);
  color: var(--kd-red);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  transition: transform 0.25s var(--ease), background 0.25s;
}
.hero-play-icon svg {
  width: 18px;
  height: 18px;
  margin-left: 2px;
}
.btn-hero-video:hover .hero-play-icon {
  transform: scale(1.1);
  background: #FFF5F5;
}

/* Video modal */
.video-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(10, 14, 20, 0.88);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
}
body.video-modal-open {
  overflow: hidden;
}
body.video-modal-open .video-modal-backdrop {
  opacity: 1;
  visibility: visible;
}
.video-modal {
  position: relative;
  width: 100%;
  max-width: 900px;
  background: #000;
  border-radius: 12px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  transform: scale(0.95);
  transition: transform 0.3s var(--ease);
}
body.video-modal-open .video-modal {
  transform: scale(1);
}
.video-modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  z-index: 10;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  color: var(--kd-white);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, background 0.2s;
}
.video-modal-close:hover {
  transform: scale(1.1);
  background: var(--kd-red);
  border-color: var(--kd-red);
}
.video-modal-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 ratio */
  height: 0;
}
.video-modal-wrapper iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---------- 13. 5 Quick Services Command Bar (Below Hero) ---------- */
.quick-services-section {
  position: relative;
  z-index: 10;
  margin-top: 32px !important;
  margin-bottom: 28px;
  padding: 0;
}
.quick-services-card-wrap {
  background: var(--kd-white);
  border: 1px solid var(--kd-border);
  border-radius: 14px;
  box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.07), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  padding: 14px 10px;
}
.quick-services-bar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 640px) {
  .quick-services-bar {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .quick-services-bar {
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
  }
}
.quick-service-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s var(--ease);
}
@media (min-width: 1024px) {
  .quick-service-item {
    border-right: 1px solid #EDF2F7;
    border-radius: 0;
    padding: 6px 18px;
  }
  .quick-service-item:first-child {
    border-top-left-radius: 8px;
    border-bottom-left-radius: 8px;
    padding-left: 6px;
  }
  .quick-service-item:last-child {
    border-right: none;
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
    padding-right: 6px;
  }
}
.quick-service-item:hover {
  background: #F8FAFC;
  transform: translateY(-2px);
  color: inherit;
}
.qs-icon-box {
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 8px;
  background: #F4F6F8;
  color: var(--kd-red);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s, transform 0.2s;
}
.quick-service-item:hover .qs-icon-box {
  background: #FFF0EE;
  transform: scale(1.05);
}
.qs-icon-box svg {
  width: 22px;
  height: 22px;
}
.qs-info {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.qs-title {
  font-family: var(--font-heading);
  font-size: 0.96rem;
  font-weight: 700;
  margin: 0 0 3px;
  color: var(--kd-dark);
  line-height: 1.25;
  transition: color 0.2s;
}
.quick-service-item:hover .qs-title {
  color: var(--kd-red);
}
.qs-desc {
  font-size: 0.78rem;
  color: var(--kd-gray);
  line-height: 1.4;
  margin: 0 0 6px;
}
.qs-arrow {
  color: var(--kd-red);
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 0.2s var(--ease);
  display: inline-block;
}
.quick-service-item:hover .qs-arrow {
  transform: translateX(4px);
}

/* ---------- 14. Portfolio & Download Cards ---------- */
.section--portfolio-download {
  background: #F8FAFC;
  padding: 60px 0;
}
.portfolio-banner {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  border-radius: 16px;
  padding: 44px 36px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
  color: var(--kd-white);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.15);
}
@media (min-width: 900px) {
  .portfolio-banner {
    grid-template-columns: 1.35fr 1fr;
    padding: 60px 54px;
  }
}
.portfolio-title {
  color: var(--kd-white);
  margin: 12px 0 14px;
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
}
.portfolio-desc {
  color: #94A3B8;
  font-size: 1.02rem;
  line-height: 1.6;
  margin-bottom: 24px;
}
.portfolio-features {
  display: grid;
  gap: 10px;
  margin-bottom: 28px;
}
.pf-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: #E2E8F0;
}
.pf-check {
  color: #38BDF8;
  font-weight: bold;
}
.portfolio-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn-white {
  background: var(--kd-white);
  color: var(--kd-dark);
}
.btn-white:hover {
  background: #F1F5F9;
  color: var(--kd-red);
}
.btn-outline-white {
  background: transparent;
  color: var(--kd-white);
  border: 1px solid rgba(255, 255, 255, 0.35);
}
.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--kd-white);
  border-color: var(--kd-white);
}

/* Brochure Mockup */
.portfolio-banner-visual {
  display: flex;
  justify-content: center;
}
.brochure-mockup {
  width: 250px;
  height: 330px;
  background: #FFFFFF;
  border-radius: 8px;
  box-shadow: 0 20px 35px rgba(0, 0, 0, 0.4), -12px 12px 24px rgba(0, 0, 0, 0.2);
  transform: rotate(-3deg);
  transition: transform 0.3s var(--ease);
  padding: 14px;
  display: flex;
  flex-direction: column;
}
.portfolio-banner:hover .brochure-mockup {
  transform: rotate(0deg) scale(1.03);
}
.brochure-cover {
  height: 100%;
  border: 2px solid #E2E8F0;
  border-radius: 4px;
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  color: var(--kd-dark);
}
.bm-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.bm-brand {
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--kd-red);
  letter-spacing: 0.08em;
}
.bm-badge {
  background: #E02424;
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}
.bm-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--kd-dark);
  margin: 16px 0 6px;
}
.bm-sub {
  font-size: 0.78rem;
  color: var(--kd-gray);
}
.bm-footer {
  font-size: 0.72rem;
  color: #64748B;
  display: flex;
  flex-direction: column;
  border-top: 1px solid #E2E8F0;
  padding-top: 10px;
}

/* Downloads page cards */
.download-card {
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.download-icon {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  background: #FFF2F1;
  color: var(--kd-red);
  display: flex;
  align-items: center;
  justify-content: center;
}
.download-icon svg {
  width: 26px;
  height: 26px;
}
.download-body {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.download-body h3 {
  font-size: 1.2rem;
  margin: 8px 0 10px;
}
.download-body p {
  font-size: 0.92rem;
  color: var(--kd-gray);
  margin-bottom: 18px;
  flex-grow: 1;
}
.download-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: #64748B;
  padding: 10px 0;
  border-top: 1px dashed var(--kd-border);
  margin-bottom: 16px;
}
.btn-block {
  width: 100%;
  text-align: center;
  justify-content: center;
}
.dl-btn-icon {
  width: 18px;
  height: 18px;
  margin-right: 6px;
}