/* ============================================================
   富尔顿官网主样式 / Fulton China Website Main Stylesheet
   设计参考 fulton.com 工业简约风格
   ============================================================ */

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --navy:        #1a3050;
  --navy-dark:   #0f1f35;
  --navy-mid:    #24457a;
  --orange:      #e85d26;
  --orange-dark: #c94d1c;
  --white:       #ffffff;
  --light-gray:  #f4f5f6;
  --mid-gray:    #8a9ba8;
  --border:      #dde3e8;
  --text:        #2c3e50;
  --text-light:  #5a6a78;

  --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Roboto', Arial, sans-serif;

  --max-w: 1200px;
  --radius: 4px;
  --shadow: 0 2px 16px rgba(0,0,0,.08);
  --shadow-hover: 0 6px 24px rgba(0,0,0,.14);
  --transition: .25s ease;
}

/* ── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-cn);
  color: var(--text);
  line-height: 1.7;
  background: var(--white);
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--orange); }
img { max-width: 100%; height: auto; display: block; }
svg { max-width: 100%; }
ul { list-style: none; }

/* ── Language System ───────────────────────────────────────── */
.lang-cn .en { display: none !important; }
.lang-en .cn { display: none !important; }

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5 { line-height: 1.3; font-weight: 700; }

.section-title {
  font-size: 2rem;
  color: var(--navy);
  margin-bottom: .5rem;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 2.5rem;
}
.label-tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: .75rem;
}

/* ── Layout Utilities ──────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 80px 0; }
.section--gray { background: var(--light-gray); }
.section--navy { background: var(--navy); color: var(--white); }
.section--navy .section-title { color: var(--white); }
.section--navy .section-subtitle { color: rgba(255,255,255,.7); }

.text-center { text-align: center; }
.text-right  { text-align: right; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .03em;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--orange);
  color: var(--white);
  border-color: var(--orange);
}
.btn-primary:hover {
  background: var(--orange-dark);
  border-color: var(--orange-dark);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}
.btn-outline:hover {
  background: var(--navy);
  color: var(--white);
}

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,.6);
}
.btn-outline-white:hover {
  background: var(--white);
  color: var(--navy);
  border-color: var(--white);
}

.btn-sm {
  padding: 8px 18px;
  font-size: .82rem;
}

/* ── Top Bar ───────────────────────────────────────────────── */
.top-bar {
  background: var(--navy-dark);
  color: rgba(255,255,255,.75);
  font-size: .8rem;
  padding: 7px 0;
}

.top-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top-bar__contacts {
  display: flex;
  gap: 24px;
}

.top-bar__contacts a {
  color: rgba(255,255,255,.75);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.top-bar__contacts a:hover { color: var(--orange); }

.top-bar__right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 3px;
  overflow: hidden;
}

.lang-btn {
  padding: 3px 10px;
  background: transparent;
  color: rgba(255,255,255,.6);
  border: none;
  cursor: pointer;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  transition: var(--transition);
}

.lang-btn.active {
  background: var(--orange);
  color: var(--white);
}

.lang-btn:hover:not(.active) {
  background: rgba(255,255,255,.1);
  color: var(--white);
}

/* ── Main Navigation ───────────────────────────────────────── */
.site-header {
  background: var(--white);
  box-shadow: 0 1px 0 var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,.12);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-svg { width: 140px; height: auto; }
.nav__logo-img { height: 44px; width: auto; max-width: 190px; object-fit: contain; display: block; }

.nav__menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
  border-radius: var(--radius);
  transition: var(--transition);
  white-space: nowrap;
}

.nav__link:hover,
.nav__link.active {
  color: var(--orange);
}

.nav__link svg.chevron {
  width: 12px;
  height: 12px;
  transition: transform var(--transition);
}

.nav__item:hover .chevron { transform: rotate(180deg); }

/* Dropdown */
.nav__dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 220px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition);
  z-index: 100;
}

.nav__item:hover .nav__dropdown {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.nav__dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: .85rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.nav__dropdown a:last-child { border-bottom: none; }

.nav__dropdown a:hover {
  background: var(--light-gray);
  color: var(--orange);
}

.nav__dropdown a .dd-dot {
  width: 6px;
  height: 6px;
  background: var(--orange);
  border-radius: 50%;
  flex-shrink: 0;
}

/* CTA button in nav */
.nav__cta {
  margin-left: 12px;
}

/* Mobile hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero Section ──────────────────────────────────────────── */
.hero {
  position: relative;
  height: 580px;
  overflow: hidden;
  background: var(--navy-dark);
}

.hero__slides { position: relative; width: 100%; height: 100%; }

.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .8s ease;
  display: flex;
  align-items: center;
}

.hero__slide.active { opacity: 1; }

.hero__slide-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.hero__slide-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(10,25,50,.85) 40%, rgba(10,25,50,.4) 100%);
}

/* SVG-based gradient backgrounds for slides (no photos needed) */
.slide-bg-1 {
  background: linear-gradient(135deg, #0f1f35 0%, #1a3050 40%, #24457a 100%);
}
.slide-bg-1::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 70% 50%, rgba(232,93,38,.15) 0%, transparent 60%),
    repeating-linear-gradient(45deg, rgba(255,255,255,.02) 0px, rgba(255,255,255,.02) 1px, transparent 1px, transparent 40px);
}

.slide-bg-2 {
  background: linear-gradient(135deg, #0c1a2e 0%, #1a3050 50%, #1e3d6e 100%);
}
.slide-bg-2::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 30% 60%, rgba(232,93,38,.12) 0%, transparent 55%),
    radial-gradient(circle at 80% 20%, rgba(36,69,122,.5) 0%, transparent 50%);
}

.slide-bg-3 {
  background: linear-gradient(135deg, #0e1d32 0%, #1a2e50 50%, #1f3d6e 100%);
}
.slide-bg-3::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 60% 30%, rgba(36,69,122,.6) 0%, transparent 50%),
    repeating-linear-gradient(-45deg, rgba(255,255,255,.015) 0px, rgba(255,255,255,.015) 1px, transparent 1px, transparent 60px);
}

.hero__content {
  position: relative;
  z-index: 2;
  color: var(--white);
  max-width: 680px;
}

.hero__eyebrow {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero__eyebrow::before {
  content: '';
  width: 32px;
  height: 2px;
  background: var(--orange);
}

.hero__title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  text-shadow: 0 2px 12px rgba(0,0,0,.3);
}

.hero__desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,.8);
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero navigation dots */
.hero__dots {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}

.hero__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,.4);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.hero__dot.active {
  background: var(--orange);
  width: 24px;
  border-radius: 4px;
}

/* Hero arrow buttons */
.hero__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: white;
  transition: var(--transition);
}
.hero__arrow:hover { background: var(--orange); border-color: var(--orange); }
.hero__arrow--prev { left: 20px; }
.hero__arrow--next { right: 20px; }

/* ── Stats Bar ─────────────────────────────────────────────── */
.stats-bar {
  background: var(--navy);
  padding: 0;
}

.stats-bar__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat-item {
  padding: 28px 24px;
  text-align: center;
  border-right: 1px solid rgba(255,255,255,.1);
  color: var(--white);
}

.stat-item:last-child { border-right: none; }

.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: .8rem;
  color: rgba(255,255,255,.6);
  letter-spacing: .04em;
}

/* ── Product Cards ─────────────────────────────────────────── */
.product-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.product-card__img {
  height: 180px;
  background: var(--light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-card__img svg {
  width: 80px;
  height: 80px;
  opacity: .5;
}

.product-card__img img {
  max-width: 85%;
  max-height: 145px;
  object-fit: contain;
  transition: transform var(--transition);
  filter: drop-shadow(0 4px 10px rgba(0,0,0,0.12));
}

.product-card:hover .product-card__img img {
  transform: scale(1.08);
}

.product-card__badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--orange);
  color: white;
  font-size: .7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: .05em;
}

.product-card__body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card__type {
  font-size: .72rem;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.product-card__name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.product-card__models {
  font-size: .82rem;
  color: var(--mid-gray);
  margin-bottom: 12px;
  flex: 1;
}

.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--orange);
  transition: gap var(--transition);
}

.product-card__link:hover { gap: 10px; color: var(--orange-dark); }

.product-card__link svg {
  width: 14px;
  height: 14px;
}

/* ── Product Icon BGs ──────────────────────────────────────── */
.icon-bg-steam    { background: linear-gradient(135deg, #e8f4fd 0%, #c8e6f8 100%); }
.icon-bg-hotwater { background: linear-gradient(135deg, #fef0e8 0%, #fdd5bb 100%); }
.icon-bg-thermal  { background: linear-gradient(135deg, #fdf5e8 0%, #f9dfa5 100%); }
.icon-bg-condensing { background: linear-gradient(135deg, #eafaf0 0%, #b7e8c8 100%); }
.icon-bg-electric { background: linear-gradient(135deg, #f0ecfa 0%, #d0bef0 100%); }
.icon-bg-pulse    { background: linear-gradient(135deg, #fce8e8 0%, #f5b8b8 100%); }

/* ── Industry / Solution Tiles ─────────────────────────────── */
.industry-tile {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  height: 220px;
  display: flex;
  align-items: flex-end;
  cursor: pointer;
  transition: transform var(--transition);
}

.industry-tile:hover { transform: translateY(-4px); }

.industry-tile__bg {
  position: absolute;
  inset: 0;
  transition: transform .4s ease;
}

.industry-tile:hover .industry-tile__bg { transform: scale(1.04); }

.industry-tile__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(10,25,50,.85) 0%, rgba(10,25,50,.2) 100%);
}

.industry-tile__content {
  position: relative;
  z-index: 2;
  padding: 20px;
  color: var(--white);
  width: 100%;
}

.industry-tile__icon {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.industry-tile__name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.industry-tile__desc {
  font-size: .8rem;
  color: rgba(255,255,255,.75);
  line-height: 1.5;
}

/* Industry gradient backgrounds */
.ind-bg-industrial {
  background: linear-gradient(135deg, #1a2a3a 0%, #2c4a6a 100%);
}
.ind-bg-industrial::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(100,150,200,.3) 0%, transparent 60%);
}

.ind-bg-food {
  background: linear-gradient(135deg, #1a3020 0%, #2d5a3a 100%);
}
.ind-bg-food::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 70%, rgba(80,180,100,.2) 0%, transparent 60%);
}

.ind-bg-commercial {
  background: linear-gradient(135deg, #2a1a30 0%, #4a2a5a 100%);
}
.ind-bg-commercial::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 60% 40%, rgba(180,100,200,.2) 0%, transparent 60%);
}

.ind-bg-healthcare {
  background: linear-gradient(135deg, #1a1a30 0%, #2a3a5a 100%);
}
.ind-bg-healthcare::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 40% 60%, rgba(100,140,220,.25) 0%, transparent 60%);
}

/* ── Why Fulton / Feature List ─────────────────────────────── */
.feature-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(232,93,38,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: var(--orange);
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

.feature-item h4 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.feature-item p {
  font-size: .85rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ── Case Study Cards ──────────────────────────────────────── */
.case-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.case-card:hover { box-shadow: var(--shadow-hover); }

.case-card__img {
  height: 160px;
  background: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-card__industry {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--orange);
  color: white;
  font-size: .7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
}

.case-card__body { padding: 20px; }

.case-card__client {
  font-size: .78rem;
  font-weight: 700;
  color: var(--mid-gray);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 6px;
}

.case-card__title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.4;
}

.case-card__desc {
  font-size: .83rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ── CTA Banner ────────────────────────────────────────────── */
.cta-banner {
  background: var(--orange);
  padding: 60px 0;
  text-align: center;
  color: var(--white);
}

.cta-banner h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 1.05rem;
  color: rgba(255,255,255,.85);
  margin-bottom: 28px;
}

.btn-white {
  background: var(--white);
  color: var(--orange);
  border-color: var(--white);
  font-weight: 700;
}

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

/* ── Contact Form ──────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 60px;
  align-items: start;
}

.contact-info__item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 28px;
}

.contact-info__icon {
  width: 44px;
  height: 44px;
  background: var(--navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: white;
}

.contact-info__icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

.contact-info__label {
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--mid-gray);
  margin-bottom: 3px;
}

.contact-info__value {
  font-size: .95rem;
  color: var(--text);
  line-height: 1.6;
}

.contact-info__value a { color: var(--orange); }
.contact-info__value a:hover { text-decoration: underline; }

/* Form styles */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.form-label .required { color: var(--orange); margin-left: 2px; }

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: .9rem;
  font-family: var(--font-cn);
  color: var(--text);
  background: var(--white);
  transition: border-color var(--transition);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--navy);
  box-shadow: 0 0 0 3px rgba(26,48,80,.08);
}

.form-textarea { resize: vertical; min-height: 120px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-note {
  font-size: .8rem;
  color: var(--mid-gray);
  margin-top: 12px;
}

.form-success {
  display: none;
  background: #e8f5e9;
  border: 1px solid #81c784;
  border-radius: var(--radius);
  padding: 16px 20px;
  color: #2e7d32;
  font-size: .9rem;
  margin-top: 16px;
  align-items: center;
  gap: 10px;
}

.form-error-msg {
  display: none;
  background: #fce4e4;
  border: 1px solid #e57373;
  border-radius: var(--radius);
  padding: 12px 16px;
  color: #c62828;
  font-size: .85rem;
  margin-top: 12px;
}

/* ── Page Hero (inner pages) ───────────────────────────────── */
.page-hero {
  background: var(--navy);
  padding: 60px 0;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    repeating-linear-gradient(45deg, rgba(255,255,255,.02) 0, rgba(255,255,255,.02) 1px, transparent 1px, transparent 40px);
}

.page-hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232,93,38,.12) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero__inner { position: relative; z-index: 2; }

.page-hero h1 {
  font-size: 2.4rem;
  margin-bottom: 12px;
  color: var(--white);
}

.page-hero p {
  font-size: 1rem;
  color: rgba(255,255,255,.75);
  max-width: 600px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  color: rgba(255,255,255,.5);
  margin-bottom: 16px;
}

.breadcrumb a { color: rgba(255,255,255,.7); }
.breadcrumb a:hover { color: var(--orange); }
.breadcrumb span { color: rgba(255,255,255,.4); }

.hero-stat {
  display: flex;
  align-items: center;
  gap: 12px;
}
.hero-stat__icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  border-radius: 50%;
  background: rgba(232,93,38,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-stat__icon svg {
  width: 20px;
  height: 20px;
  max-width: 20px;
  max-height: 20px;
  stroke: #e85d26;
  fill: none;
  stroke-width: 2;
  display: block;
}

/* ── Tabs ──────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 20px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-cn);
}

.tab-btn.active,
.tab-btn:hover {
  color: var(--navy);
  border-bottom-color: var(--orange);
}

/* ── About Page ────────────────────────────────────────────── */
.about-stats-box {
  background: var(--navy);
  border-radius: var(--radius);
  padding: 36px 30px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  box-shadow: var(--shadow);
}
.about-stat {
  display: flex;
  flex-direction: column;
}
.about-stat__number {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--orange);
  line-height: 1.1;
  margin-bottom: 6px;
  font-family: var(--font-en);
}
.about-stat__number sup {
  font-size: 1.2rem;
  color: var(--orange);
}
.about-stat__label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.4;
}

.about-overview__body {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-light);
  margin-bottom: 16px;
}
.about-overview__actions {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding: 10px 0 10px 36px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}
.timeline__item, .timeline-item {
  position: relative;
  margin-bottom: 32px;
}
.timeline__item:last-child, .timeline-item:last-child {
  margin-bottom: 0;
}
.timeline__marker {
  position: absolute;
  left: -36px;
  top: 2px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--orange);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 3px #fff, 0 0 0 5px var(--border);
  z-index: 2;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--orange);
  border: 2px solid var(--white);
  box-shadow: 0 0 0 2px var(--orange);
}
.timeline__year, .timeline-year {
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}
.timeline-year {
  font-size: .82rem;
  color: var(--orange);
  letter-spacing: .08em;
  margin-bottom: 4px;
}
.timeline__content {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.timeline__title, .timeline-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}
.timeline__body, .timeline-desc {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* Value Cards */
.value-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
}
.value-card:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}
.value-card__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.value-card__icon svg {
  width: 44px;
  height: 44px;
  max-width: 44px;
  max-height: 44px;
  display: block;
}
.value-card__title {
  font-size: 1.15rem;
  color: var(--white);
  margin-bottom: 10px;
}
.value-card__body {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
}

/* Factory Cards */
.factory-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
}
.factory-card__image {
  height: 200px;
  position: relative;
  overflow: hidden;
}
.factory-card__image svg {
  max-width: 100%;
}
.factory-card__body {
  padding: 28px;
  flex: 1;
}
.factory-card__header {
  margin-bottom: 16px;
}
.factory-card__tag {
  display: inline-block;
  background: rgba(232,93,38,0.1);
  color: var(--orange);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 2px;
  margin-bottom: 8px;
  letter-spacing: 1px;
}
.factory-card__title {
  font-size: 1.15rem;
  color: var(--navy);
  font-weight: 700;
}
.factory-card__list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 14px;
}
.factory-card__list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.5;
}
.factory-card__list li svg {
  width: 18px;
  height: 18px;
  min-width: 18px;
  min-height: 18px;
  max-width: 18px;
  max-height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
  stroke: var(--orange);
}

/* ── Certifications & Standards (资质与认证) ─────────────────── */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}
.cert-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
  transition: all var(--transition);
  position: relative;
}
.cert-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--orange);
  transform: translateY(-2px);
}
.cert-card__top {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}
.cert-badge {
  width: 52px;
  height: 52px;
  min-width: 52px;
  min-height: 52px;
  max-width: 52px;
  max-height: 52px;
  border-radius: 50%;
  background: #f8fafc;
  border: 2px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}
.cert-badge svg {
  width: 44px;
  height: 44px;
  min-width: 44px;
  max-width: 44px;
  display: block;
}
.cert-card__title-wrap {
  flex: 1;
}
.cert-card__name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.25;
  margin-bottom: 3px;
}
.cert-card__org {
  font-size: 0.78rem;
  color: var(--text-light);
  line-height: 1.3;
}
.cert-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 2px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: rgba(26,48,80,0.08);
  color: var(--navy);
  margin-bottom: 10px;
  align-self: flex-start;
}
.cert-tag--intl {
  background: rgba(232,93,38,0.1);
  color: var(--orange);
}
.cert-card__desc {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
  border-top: 1px solid #f0f2f5;
  padding-top: 12px;
  margin-top: auto;
}

/* Fallback / Complementary for .logo-chip */
.logo-chip {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  transition: var(--transition);
}
.logo-chip:hover {
  border-color: var(--orange);
  box-shadow: var(--shadow);
}
.logo-chip__icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  max-width: 44px;
  max-height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.logo-chip__icon svg {
  width: 40px;
  height: 40px;
  max-width: 40px;
  max-height: 40px;
}
.logo-chip__text {
  flex: 1;
}
.logo-chip__name {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 2px;
}
.logo-chip__desc {
  display: block;
  font-size: 0.78rem;
  color: var(--text-light);
  line-height: 1.3;
}

/* ── Service Page ──────────────────────────────────────────── */
.service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--orange);
}

.service-card__icon {
  width: 56px;
  height: 56px;
  background: rgba(26,48,80,.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.service-card__icon svg {
  width: 28px;
  height: 28px;
  fill: none;
  stroke: var(--navy);
  stroke-width: 1.8;
}

.service-card h3 {
  font-size: 1.05rem;
  color: var(--navy);
  margin-bottom: 10px;
}

.service-card p {
  font-size: .88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ── Map Placeholder ───────────────────────────────────────── */
.map-placeholder {
  width: 100%;
  height: 340px;
  background: linear-gradient(135deg, #e8f0f8 0%, #d0dff0 100%);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--mid-gray);
  border: 1px solid var(--border);
}

.map-placeholder svg {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  opacity: .4;
}

/* ── Accordion (FAQ) ───────────────────────────────────────── */
.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  overflow: hidden;
}

.accordion-btn {
  width: 100%;
  padding: 16px 20px;
  background: var(--white);
  border: none;
  text-align: left;
  font-family: var(--font-cn);
  font-size: .9rem;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}

.accordion-btn:hover { background: var(--light-gray); }

.accordion-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.accordion-btn.open svg { transform: rotate(180deg); }

.accordion-content {
  display: none;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  font-size: .88rem;
  color: var(--text-light);
  line-height: 1.8;
  background: var(--light-gray);
}

/* ── Partners / Client Logos ───────────────────────────────── */
.logo-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}

.logo-chip {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 24px;
  font-size: .85rem;
  font-weight: 700;
  color: var(--mid-gray);
  transition: var(--transition);
}

.logo-chip:hover {
  border-color: var(--navy);
  color: var(--navy);
}

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,.7);
}

.footer__main {
  padding: 60px 0 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer__brand .footer-logo { margin-bottom: 16px; }

.footer__tagline {
  font-size: .88rem;
  line-height: 1.7;
  margin-bottom: 20px;
  color: rgba(255,255,255,.6);
}

.footer__social {
  display: flex;
  gap: 10px;
}

.social-btn {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.6);
  transition: var(--transition);
}

.social-btn:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: white;
}

.social-btn svg { width: 16px; height: 16px; fill: currentColor; }

.footer__col-title {
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer__links a {
  font-size: .85rem;
  color: rgba(255,255,255,.55);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer__links a:hover { color: var(--orange); padding-left: 4px; }

.footer__contact-item {
  display: flex;
  gap: 10px;
  font-size: .83rem;
  color: rgba(255,255,255,.55);
  margin-bottom: 12px;
  line-height: 1.5;
}

.footer__contact-item svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  margin-top: 2px;
  fill: none;
  stroke: var(--orange);
  stroke-width: 2;
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .78rem;
  color: rgba(255,255,255,.35);
}

.footer__icp a {
  color: rgba(255,255,255,.35);
  transition: var(--transition);
}

.footer__icp a:hover { color: rgba(255,255,255,.6); }

/* ── Loading spinner ───────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Animations ────────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-in-up {
  animation: fadeInUp .6s ease both;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero__title { font-size: 2.4rem; }
  .footer__main { grid-template-columns: 1fr 1fr; gap: 32px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-bar__inner { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .hero { height: 480px; }
  .hero__title { font-size: 1.9rem; }
  .hero__desc { font-size: .95rem; }
  .section-title { font-size: 1.6rem; }
  
  .nav__menu { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: white; padding: 16px; border-top: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,0,0,.1); gap: 4px; }
  .nav__menu.open { display: flex; }
  .nav__hamburger { display: flex; }
  .nav__dropdown { position: static; opacity: 1; pointer-events: all; transform: none; box-shadow: none; border: none; background: var(--light-gray); border-radius: 0; }
  .nav__cta { display: none; }
  
  .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .about-stats-box { grid-template-columns: 1fr; gap: 20px; }
  .timeline { padding-left: 28px; }
  .timeline__marker { left: -32px; width: 22px; height: 22px; }
  .form-row { grid-template-columns: 1fr; }
  
  .footer__main { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; gap: 8px; text-align: center; }
  
  .top-bar__contacts { display: none; }
  .stats-bar__inner { grid-template-columns: repeat(2, 1fr); }
  
  .page-hero h1 { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .hero { height: 420px; }
  .hero__title { font-size: 1.6rem; }
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .grid-3 { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .footer__main { grid-template-columns: 1fr; }
  .stats-bar__inner { grid-template-columns: 1fr 1fr; }
}