:root {
  --brand: #ff6a00;
  --brand-2: #ff9a3c;
  --brand-3: #e85d04;
  --brand-soft: rgba(255, 106, 0, 0.12);
  --bg: #fff8f2;
  --bg-2: #ffffff;
  --bg-3: #fff1e6;
  --text: #241a12;
  --text-2: #5c4a3d;
  --text-3: #8a7768;
  --line: rgba(36, 26, 18, 0.1);
  --line-strong: rgba(36, 26, 18, 0.18);
  --card: rgba(255, 255, 255, 0.72);
  --card-solid: #ffffff;
  --glass: rgba(255, 255, 255, 0.55);
  --glass-strong: rgba(255, 255, 255, 0.82);
  --shadow-sm: 0 2px 8px rgba(120, 60, 10, 0.06);
  --shadow: 0 10px 30px rgba(120, 60, 10, 0.1);
  --shadow-lg: 0 24px 60px rgba(120, 60, 10, 0.16);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --header-h: 68px;
  --maxw: 1200px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

html[data-theme="dark"] {
  --brand: #ff8a3d;
  --brand-2: #ffb066;
  --brand-3: #ff6a00;
  --brand-soft: rgba(255, 138, 61, 0.16);
  --bg: #14100d;
  --bg-2: #1b1511;
  --bg-3: #221a14;
  --text: #f6efe8;
  --text-2: #cdbfb3;
  --text-3: #9c8c7e;
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(255, 255, 255, 0.18);
  --card: rgba(40, 31, 24, 0.66);
  --card-solid: #241b15;
  --glass: rgba(40, 31, 24, 0.5);
  --glass-strong: rgba(40, 31, 24, 0.82);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --brand: #ff8a3d;
    --brand-2: #ffb066;
    --brand-3: #ff6a00;
    --brand-soft: rgba(255, 138, 61, 0.16);
    --bg: #14100d;
    --bg-2: #1b1511;
    --bg-3: #221a14;
    --text: #f6efe8;
    --text-2: #cdbfb3;
    --text-3: #9c8c7e;
    --line: rgba(255, 255, 255, 0.1);
    --line-strong: rgba(255, 255, 255, 0.18);
    --card: rgba(40, 31, 24, 0.66);
    --card-solid: #241b15;
    --glass: rgba(40, 31, 24, 0.5);
    --glass-strong: rgba(40, 31, 24, 0.82);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 85% -10%, var(--brand-soft), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(255, 154, 60, 0.1), transparent 55%),
    var(--bg);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}

img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--brand-3);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

a:hover,
a:focus-visible {
  color: var(--brand);
}

h1, h2, h3, h4 {
  line-height: 1.3;
  margin: 0 0 0.6em;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.9rem, 4.2vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.12rem, 2vw, 1.35rem); }

p { margin: 0 0 1em; color: var(--text-2); }

ul, ol { margin: 0 0 1em; padding-left: 1.3em; }
li { margin-bottom: 0.4em; color: var(--text-2); }

:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection {
  background: var(--brand);
  color: #fff;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--brand);
  color: #fff;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow);
  transition: top 0.3s var(--ease);
}

.skip-link:focus {
  top: 12px;
  color: #fff;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--brand), var(--brand-3));
  border-radius: 999px;
  border: 2px solid var(--bg);
}

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--glass);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

#site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
  background: var(--glass-strong);
}

.header-inner {
  max-width: var(--maxw);
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: 0 6px 16px rgba(255, 106, 0, 0.35);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.brand:hover .brand-logo {
  transform: rotate(-6deg) scale(1.06);
  box-shadow: 0 10px 24px rgba(255, 106, 0, 0.45);
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(120deg, var(--brand), var(--brand-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}

.main-nav {
  flex: 1;
  min-width: 0;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

.main-nav ul::-webkit-scrollbar { display: none; }

.main-nav li { margin: 0; }

.main-nav a {
  display: block;
  padding: 8px 11px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-2);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--brand-3);
  background: var(--brand-soft);
  transform: translateY(-1px);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.site-search {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--glass-strong);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  padding: 3px 3px 3px 14px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.site-search:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-soft);
}

.site-search input {
  width: 150px;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 0.875rem;
  padding: 6px 4px;
  outline: none;
}

.site-search input::placeholder { color: var(--text-3); }

.site-search button {
  border: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--brand-3));
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  transition: filter 0.25s var(--ease), transform 0.25s var(--ease);
}

.site-search button:hover { filter: brightness(1.08); transform: scale(1.03); }

#theme-toggle,
#menu-toggle {
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-2);
  background: var(--glass-strong);
  border: 1px solid var(--line-strong);
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

#theme-toggle:hover,
#menu-toggle:hover {
  color: var(--brand-3);
  border-color: var(--brand);
  transform: translateY(-1px);
}

#menu-toggle { display: none; }

.breadcrumb {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 20px 0;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-3);
}

.breadcrumb li { margin: 0; display: flex; align-items: center; gap: 8px; }

.breadcrumb li + li::before {
  content: "/";
  color: var(--text-3);
  opacity: 0.6;
}

.breadcrumb a { color: var(--text-2); }
.breadcrumb a:hover { color: var(--brand-3); }
.breadcrumb [aria-current="page"] { color: var(--brand-3); font-weight: 600; }

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 40px;
}

main > section {
  margin-top: 56px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

main > section > h2 {
  position: relative;
  padding-left: 18px;
  margin-bottom: 20px;
}

main > section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--brand), var(--brand-3));
}

.hero {
  position: relative;
  margin-top: 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 45%, var(--brand-3) 100%);
  box-shadow: var(--shadow-lg);
  color: #fff;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 300px at 90% 0%, rgba(255, 255, 255, 0.28), transparent 60%),
    radial-gradient(500px 260px at 0% 100%, rgba(0, 0, 0, 0.18), transparent 60%);
  z-index: -1;
}

.hero-slider {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 16px 16px 0;
}

.hero-slider .slide {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  transform: translateY(0);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
  animation: slideFade 0.9s var(--ease) both;
}

.hero-slider .slide:nth-child(2) { animation-delay: 0.12s; }
.hero-slider .slide:nth-child(3) { animation-delay: 0.24s; }

.hero-slider .slide:hover {
  transform: translateY(-6px) scale(1.015);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
}

.hero-slider .slide svg {
  width: 100%;
  height: auto;
  display: block;
}

.hero-content {
  padding: 28px 32px 8px;
}

.hero-content h1 {
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.22);
  margin-bottom: 14px;
}

.hero-lead {
  color: rgba(255, 255, 255, 0.94);
  max-width: 900px;
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 22px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), background-color 0.28s var(--ease), color 0.28s var(--ease);
}

.btn-primary {
  color: var(--brand-3);
  background: #fff;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.18);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: var(--brand-3);
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.26);
}

.btn-secondary {
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  color: var(--brand-3);
  background: #fff;
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.22);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0 32px 30px;
}

.hero-stats li {
  margin: 0;
  padding: 16px 12px;
  text-align: center;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.hero-stats li:hover {
  background: rgba(255, 255, 255, 0.24);
  transform: translateY(-4px);
}

.stat-num {
  display: block;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.hero-stats li span:last-child {
  display: block;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.88);
  margin-top: 2px;
}

.anchor-nav {
  position: sticky;
  top: calc(var(--header-h) + 8px);
  z-index: 50;
  margin-top: 24px;
  border-radius: var(--radius);
  background: var(--glass);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.anchor-nav ul {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 8px 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

.anchor-nav ul::-webkit-scrollbar { display: none; }

.anchor-nav li { margin: 0; flex-shrink: 0; }

.anchor-nav a {
  display: block;
  padding: 6px 13px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease);
}

.anchor-nav a:hover,
.anchor-nav a:focus-visible {
  color: var(--brand-3);
  background: var(--brand-soft);
}

#intro,
#about,
#history,
#culture,
#products,
#advantages,
#solutions,
#applications,
#cases,
#reviews,
#news,
#articles,
#knowledge,
#faq,
#howto,
#contact,
#sitemap,
#links,
#legal,
#eeat {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
}

#intro:hover,
#about:hover,
#products:hover,
#cases:hover,
#news:hover,
#articles:hover,
#faq:hover,
#contact:hover {
  box-shadow: var(--shadow);
  border-color: var(--line-strong);
}

#products article,
#cases article,
#news article,
#articles > article {
  position: relative;
  padding: 22px 24px;
  margin-bottom: 16px;
  border-radius: var(--radius);
  background: var(--card-solid);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

#products article:hover,
#cases article:hover,
#news article:hover,
#articles > article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--brand);
}

#products article:last-child,
#cases article:last-child,
#news article:last-child,
#articles > article:last-child {
  margin-bottom: 0;
}

#products article h3,
#cases article h3,
#news article h3,
#articles > article h3 {
  color: var(--brand-3);
  margin-bottom: 0.5em;
}

#articles > article .meta {
  font-size: 0.8rem;
  color: var(--text-3);
  margin-bottom: 0.8em;
  padding-bottom: 0.8em;
  border-bottom: 1px dashed var(--line-strong);
}

#articles > article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--brand-3);
  padding: 4px 0;
  transition: gap 0.25s var(--ease), color 0.25s var(--ease);
}

#articles > article a::after {
  content: "→";
  transition: transform 0.25s var(--ease);
}

#articles > article a:hover { gap: 10px; color: var(--brand); }
#articles > article a:hover::after { transform: translateX(3px); }

#news article time {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--brand-3);
  background: var(--brand-soft);
  padding: 2px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 10px;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--brand), var(--brand-2), transparent);
}

.timeline li {
  position: relative;
  margin-bottom: 22px;
  padding: 18px 22px;
  border-radius: var(--radius);
  background: var(--card-solid);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.timeline li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 24px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 3px solid var(--brand);
  box-shadow: 0 0 0 4px var(--brand-soft);
}

.timeline li:last-child { margin-bottom: 0; }

.timeline h3 { color: var(--brand-3); margin-bottom: 0.4em; }
.timeline p { margin-bottom: 0; }

#culture h3,
#advantages h3,
#solutions h3,
#applications h3,
#knowledge h3,
#howto h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  margin-top: 1.4em;
  margin-bottom: 0.5em;
}

#culture h3::before,
#advantages h3::before,
#solutions h3::before,
#applications h3::before,
#knowledge h3::before,
#howto h3::before {
  content: "";
  flex-shrink: 0;
  width: 9px;
  height: 9px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--brand), var(--brand-3));
  transform: rotate(45deg);
}

#culture h3:first-of-type,
#advantages h3:first-of-type,
#solutions h3:first-of-type,
#applications h3:first-of-type,
#knowledge h3:first-of-type,
#howto h3:first-of-type {
  margin-top: 0;
}

#reviews blockquote {
  position: relative;
  margin: 0 0 16px;
  padding: 22px 26px 22px 60px;
  border-radius: var(--radius);
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-left: 4px solid var(--brand);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

#reviews blockquote:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

#reviews blockquote::before {
  content: "“";
  position: absolute;
  left: 18px;
  top: 6px;
  font-size: 3.2rem;
  line-height: 1;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--brand);
  opacity: 0.35;
}

#reviews blockquote p {
  font-size: 1.02rem;
  color: var(--text);
  margin-bottom: 8px;
}

#reviews blockquote footer {
  font-size: 0.85rem;
  color: var(--text-3);
  font-weight: 600;
}

#reviews blockquote:last-child { margin-bottom: 0; }

#faq details {
  margin-bottom: 12px;
  border-radius: var(--radius);
  background: var(--card-solid);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

#faq details:hover { border-color: var(--brand); }

#faq details[open] {
  border-color: var(--brand);
  box-shadow: var(--shadow);
}

#faq summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 16px 52px 16px 20px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease);
}

#faq summary::-webkit-details-marker { display: none; }

#faq summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  line-height: 24px;
  text-align: center;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--brand-3);
  background: var(--brand-soft);
  border-radius: 50%;
  transition: transform 0.35s var(--ease), background-color 0.35s var(--ease), color 0.35s var(--ease);
}

#faq details[open] summary {
  color: var(--brand-3);
  background: var(--brand-soft);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: var(--brand);
  color: #fff;
}

#faq details p {
  margin: 0;
  padding: 4px 20px 20px;
  color: var(--text-2);
  animation: fadeIn 0.35s var(--ease);
}

#faq details:last-child { margin-bottom: 0; }

#howto ol {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 12px 16px 12px 52px;
  margin-bottom: 10px;
  border-radius: var(--radius-sm);
  background: var(--card-solid);
  border: 1px solid var(--line);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

#howto ol li:hover {
  border-color: var(--brand);
  transform: translateX(4px);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  line-height: 26px;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 700;
  color: #fff;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-3));
}

.company-info,
#contact address {
  font-style: normal;
  margin-top: 18px;
  padding: 20px 24px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--brand-soft), transparent);
  border: 1px dashed var(--brand);
}

.company-info p,
#contact address p {
  margin-bottom: 6px;
  color: var(--text-2);
  font-size: 0.94rem;
}

.company-info p:last-child,
#contact address p:last-child { margin-bottom: 0; }

#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}

#sitemap li,
#links li { margin: 0; }

#sitemap a,
#links a {
  display: inline-block;
  padding: 7px 16px;
  font-size: 0.86rem;
  color: var(--text-2);
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

#sitemap a:hover,
#links a:hover {
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--brand-3));
  border-color: transparent;
  transform: translateY(-2px);
}

#legal h3 { color: var(--brand-3); margin-top: 1.2em; }
#legal h3:first-of-type { margin-top: 0; }

#eeat p { font-size: 0.94rem; }
#eeat p:nth-of-type(2),
#eeat p:nth-of-type(3) {
  display: inline-block;
  margin-right: 20px;
  font-size: 0.84rem;
  color: var(--text-3);
}

#site-footer {
  margin-top: 60px;
  padding: 40px 20px 30px;
  background: linear-gradient(180deg, transparent, var(--bg-3));
  border-top: 1px solid var(--line);
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  text-align: center;
}

.footer-inner > p {
  margin: 0 0 6px;
  font-size: 0.86rem;
  color: var(--text-3);
}

.footer-inner > p:first-child {
  font-weight: 600;
  color: var(--text-2);
}

#site-footer nav { margin-top: 18px; }

#site-footer nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

#site-footer nav li { margin: 0; }

#site-footer nav a {
  font-size: 0.85rem;
  color: var(--text-2);
  transition: color 0.25s var(--ease);
}

#site-footer nav a:hover { color: var(--brand-3); }

#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  width: 48px;
  height: 48px;
  padding: 0;
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1.1;
  color: #fff;
  cursor: pointer;
  border: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-3));
  box-shadow: 0 10px 26px rgba(255, 106, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s var(--ease), filter 0.25s var(--ease);
}

#back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

#back-to-top:hover {
  filter: brightness(1.1);
  transform: translateY(-3px) scale(1.05);
}

@keyframes slideFade {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes revealUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
}

.reveal.is-visible {
  animation: revealUp 0.7s var(--ease) forwards;
}

.reveal.delay-1 { animation-delay: 0.08s; }
.reveal.delay-2 { animation-delay: 0.16s; }
.reveal.delay-3 { animation-delay: 0.24s; }

@media (max-width: 1080px) {
  .site-search input { width: 110px; }
  .main-nav a { padding: 8px 9px; font-size: 0.85rem; }
}

@media (max-width: 900px) {
  :root { --header-h: 60px; }

  .header-inner { gap: 12px; }

  .site-search { display: none; }

  #menu-toggle { display: inline-flex; }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    background: var(--glass-strong);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    transition: max-height 0.45s var(--ease);
  }

  .main-nav.is-open { max-height: 70vh; overflow-y: auto; }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 16px 18px;
    overflow: visible;
  }

  .main-nav a {
    padding: 12px 14px;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
  }

  .hero-slider { grid-template-columns: 1fr; }
  .hero-slider .slide:nth-child(2),
  .hero-slider .slide:nth-child(3) { display: none; }

  .hero-content { padding: 22px 20px 6px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); padding: 0 20px 24px; }

  main > section { margin-top: 40px; }

  #intro, #about, #history, #culture, #products, #advantages,
  #solutions, #applications, #cases, #reviews, #news, #articles,
  #knowledge, #faq, #howto, #contact, #sitemap, #links, #legal, #eeat {
    padding: 22px 18px;
    border-radius: var(--radius);
  }
}

@media (max-width: 600px) {
  body { font-size: 15px; }

  .header-inner { padding: 0 14px; }
  .brand-name { font-size: 1.05rem; }
  .brand-logo { width: 34px; height: 34px; }
  #theme-toggle { padding: 7px 11px; font-size: 0.8rem; }
  #menu-toggle { padding: 7px 11px; font-size: 0.8rem; }

  .breadcrumb { padding: 12px 14px 0; }

  main { padding: 0 14px 30px; }

  .hero { border-radius: var(--radius); }
  .hero-content h1 { font-size: 1.5rem; }
  .hero-lead { font-size: 0.92rem; line-height: 1.8; }
  .hero-cta { gap: 10px; }
  .btn-primary, .btn-secondary { padding: 10px 22px; font-size: 0.88rem; }

  .hero-stats { gap: 8px; padding: 0 14px 18px; }
  .hero-stats li { padding: 12px 8px; }
  .stat-num { font-size: 1.25rem; }
  .hero-stats li span:last-child { font-size: 0.72rem; }

  .anchor-nav { top: calc(var(--header-h) + 4px); }
  .anchor-nav ul { padding: 6px 8px; }
  .anchor-nav a { padding: 5px 11px; font-size: 0.78rem; }

  #products article, #cases article, #news article, #articles > article {
    padding: 18px 16px;
  }

  .timeline { padding-left: 22px; }
  .timeline li { padding: 15px 16px; }
  .timeline li::before { left: -22px; width: 14px; height: 14px; top: 20px; }

  #reviews blockquote { padding: 18px 18px 18px 46px; }
  #reviews blockquote::before { left: 12px; font-size: 2.6rem; }

  #faq summary { padding: 14px 46px 14px 16px; font-size: 0.92rem; }
  #faq details p { padding: 0 16px 16px; }

  #howto ol li { padding: 10px 12px 10px 44px; }
  #howto ol li::before { left: 10px; width: 24px; height: 24px; line-height: 24px; }

  .company-info, #contact address { padding: 16px; }

  #back-to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; font-size: 0.62rem; }

  #site-footer { padding: 30px 14px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  #site-header, .anchor-nav, #back-to-top, #site-footer nav, .hero-cta { display: none !important; }
  body { background: #fff; color: #000; }
  main > section { box-shadow: none; border: 1px solid #ddd; page-break-inside: avoid; }
  a { color: #000; text-decoration: underline; }
}