:root {
  --bg: #f5f7fa;
  --bg-alt: #ffffff;
  --bg-elevated: rgba(255, 255, 255, 0.72);
  --text: #1a1a2e;
  --text-muted: #5a5f7a;
  --text-light: #8b90a8;
  --primary: #e63946;
  --primary-dark: #c1121f;
  --secondary: #457b9d;
  --secondary-dark: #2c5f7c;
  --accent: #f4a261;
  --accent-2: #2a9d8f;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.14);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.09);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 8px 32px rgba(230, 57, 70, 0.22);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.65);
  --glass-blur: blur(18px) saturate(160%);
  --header-h: 68px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  --grad-hero: linear-gradient(135deg, #1e1e2f 0%, #2d2d5e 35%, #457b9d 70%, #e63946 100%);
  --grad-primary: linear-gradient(135deg, #e63946 0%, #f4a261 100%);
  --grad-secondary: linear-gradient(135deg, #457b9d 0%, #2a9d8f 100%);
  --grad-card: linear-gradient(160deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.65) 100%);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "JetBrains Mono", Consolas, monospace;
}

[data-theme="dark"] {
  --bg: #0f0f1a;
  --bg-alt: #1a1a2e;
  --bg-elevated: rgba(30, 30, 50, 0.72);
  --text: #e8eaf0;
  --text-muted: #a0a5c0;
  --text-light: #6b7090;
  --primary: #ff4d5e;
  --primary-dark: #e63946;
  --secondary: #5a9bc4;
  --secondary-dark: #457b9d;
  --accent: #f4a261;
  --accent-2: #3ec9b8;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 8px 32px rgba(255, 77, 94, 0.25);
  --glass-bg: rgba(26, 26, 46, 0.6);
  --glass-border: rgba(255, 255, 255, 0.1);
  --grad-hero: linear-gradient(135deg, #0a0a14 0%, #1a1a3e 35%, #2c5f7c 70%, #c1121f 100%);
  --grad-card: linear-gradient(160deg, rgba(30,30,50,0.9) 0%, rgba(30,30,50,0.6) 100%);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 20px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(230, 57, 70, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 70%, rgba(69, 123, 157, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 100%, rgba(244, 162, 97, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

[data-theme="dark"] body::before {
  background:
    radial-gradient(circle at 15% 20%, rgba(255, 77, 94, 0.1) 0%, transparent 45%),
    radial-gradient(circle at 85% 70%, rgba(90, 155, 196, 0.1) 0%, transparent 45%),
    radial-gradient(circle at 50% 100%, rgba(244, 162, 97, 0.06) 0%, transparent 50%);
}

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

a {
  color: var(--secondary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--primary);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
textarea {
  font-family: inherit;
  font-size: inherit;
}

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

/* ===== Header ===== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
  background: var(--bg-elevated);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.logo:hover {
  transform: scale(1.04);
}

.logo svg {
  width: 42px;
  height: 42px;
  filter: drop-shadow(0 2px 6px rgba(230, 57, 70, 0.3));
  transition: transform var(--transition);
}

.logo:hover svg {
  transform: rotate(-8deg);
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), background var(--transition);
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition);
}

.main-nav a:hover {
  color: var(--text);
  background: rgba(230, 57, 70, 0.08);
}

.main-nav a:hover::after {
  width: 60%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.header-actions button {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  border-radius: 50%;
  background: transparent;
  color: var(--text-muted);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.header-actions button:hover {
  background: rgba(230, 57, 70, 0.12);
  color: var(--primary);
  transform: translateY(-2px);
}

.header-actions button:active {
  transform: scale(0.92);
}

#menu-toggle {
  display: none;
}

/* ===== Search Bar ===== */
.search-bar {
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

.search-bar form {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  gap: 12px;
}

.search-bar input {
  flex: 1;
  padding: 12px 18px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-alt);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-bar input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.15);
}

.search-bar button {
  padding: 12px 28px;
  background: var(--grad-primary);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
}

.search-bar button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 0;
  overflow: hidden;
}

.hero-slider {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-hero);
  overflow: hidden;
}

.hero-slider::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(230, 57, 70, 0.25) 0%, transparent 45%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-slider::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
  pointer-events: none;
  z-index: 2;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px 100px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease, visibility 0.8s;
  z-index: 1;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  z-index: 3;
}

.slide h1,
.slide h2 {
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  max-width: 900px;
  animation: heroTextIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.slide p {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 36px;
  max-width: 640px;
  animation: heroTextIn 0.9s 0.12s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.slide .btn {
  animation: heroTextIn 0.9s 0.24s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes heroTextIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 38px;
  font-size: 1.02rem;
  font-weight: 700;
  color: #fff;
  background: var(--grad-primary);
  border-radius: 50px;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.25) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn:hover {
  color: #fff;
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 14px 40px rgba(230, 57, 70, 0.4);
}

.btn:hover::before {
  opacity: 1;
}

.btn:active {
  transform: translateY(-1px) scale(0.99);
}

/* Hero Stats */
.hero-stats {
  position: relative;
  z-index: 5;
  max-width: 1100px;
  margin: -70px auto 0;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px 16px;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.stat:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.stat .num {
  display: block;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 900;
  line-height: 1.2;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-variant-numeric: tabular-nums;
}

.stat span:last-child {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-weight: 500;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 24px 0;
  position: relative;
  z-index: 5;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-light);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-light);
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--primary);
}

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

/* ===== Sections ===== */
.section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 72px 24px;
  position: relative;
  z-index: 1;
}

.section > h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 28px;
  position: relative;
  padding-left: 20px;
  letter-spacing: 0.01em;
}

.section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 6px;
  background: var(--grad-primary);
  box-shadow: 0 0 16px rgba(230, 57, 70, 0.4);
}

.section h3 {
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 800;
  margin: 36px 0 14px;
  color: var(--text);
  line-height: 1.4;
}

.section h4 {
  font-size: 1.08rem;
  font-weight: 700;
  margin: 24px 0 10px;
  color: var(--secondary);
}

.section p {
  color: var(--text-muted);
  margin-bottom: 16px;
  max-width: 78ch;
}

.section > p:first-of-type {
  font-size: 1.05rem;
  color: var(--text);
}

.section ul,
.section ol {
  margin: 16px 0 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section ul li,
.section ol li {
  position: relative;
  padding-left: 28px;
  color: var(--text-muted);
  line-height: 1.7;
}

.section ul li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.65em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--grad-primary);
  box-shadow: 0 0 8px rgba(230, 57, 70, 0.5);
}

.section ol {
  counter-reset: ol-counter;
}

.section ol li {
  counter-increment: ol-counter;
  padding-left: 40px;
}

.section ol li::before {
  content: counter(ol-counter);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 800;
  color: #fff;
  background: var(--grad-primary);
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(230, 57, 70, 0.35);
}

.section strong {
  color: var(--text);
  font-weight: 700;
}

/* ===== Brand Intro ===== */
#brand-intro {
  background: transparent;
}

#brand-intro > p:first-of-type {
  font-size: 1.1rem;
  line-height: 1.85;
  padding: 28px 32px;
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  color: var(--text);
  max-width: none;
}

/* ===== Products ===== */
#products {
  background: transparent;
}

#products ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin: 24px 0 32px;
}

#products ul li {
  padding: 24px 24px 24px 52px;
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#products ul li:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(230, 57, 70, 0.3);
}

#products ul li::before {
  left: 22px;
  top: 1.55em;
}

#products h4 {
  padding: 18px 22px;
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  margin: 20px 0 12px;
  transition: transform var(--transition), border-color var(--transition);
}

#products h4:hover {
  transform: translateX(6px);
  border-left-color: var(--accent);
}

/* ===== Solutions ===== */
#solutions {
  background: transparent;
}

#solutions h3 {
  padding: 20px 26px;
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  margin-bottom: 0;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

#solutions h3::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--grad-primary);
  transition: width var(--transition);
}

#solutions h3:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

#solutions h3:hover::after {
  width: 8px;
}

#solutions h3 + p {
  padding: 20px 26px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

/* ===== Cases ===== */
#cases {
  background: transparent;
}

#cases h3 {
  display: inline-block;
  padding: 10px 22px;
  background: var(--grad-secondary);
  color: #fff;
  border-radius: 50px;
  font-size: 1.05rem;
  margin: 32px 0 14px;
  box-shadow: 0 4px 16px rgba(69, 123, 157, 0.3);
  transition: transform var(--transition), box-shadow var(--transition);
}

#cases h3:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 24px rgba(69, 123, 157, 0.45);
}

#cases blockquote {
  margin: 32px 0 0;
  padding: 28px 32px;
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-left: 5px solid var(--accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  top: -10px;
  left: 22px;
  font-size: 5rem;
  font-family: Georgia, serif;
  line-height: 1;
  color: var(--accent);
  opacity: 0.35;
  pointer-events: none;
}

#cases blockquote p {
  position: relative;
  padding-left: 28px;
  margin-bottom: 14px;
  font-style: italic;
  color: var(--text);
  line-height: 1.8;
}

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

#cases blockquote p::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 14px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* ===== News ===== */
#news {
  background: transparent;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  background: var(--bg-alt);
}

.news-list li {
  padding: 20px 26px 20px 26px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  transition: background var(--transition), padding-left var(--transition);
  position: relative;
}

.news-list li:last-child {
  border-bottom: none;
}

.news-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--grad-primary);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition);
}

.news-list li:hover {
  background: rgba(230, 57, 70, 0.05);
  padding-left: 34px;
}

.news-list li:hover::before {
  transform: scaleY(1);
}

.news-list time {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  padding: 3px 12px;
  background: rgba(230, 57, 70, 0.1);
  border-radius: 50px;
  letter-spacing: 0.02em;
}

/* ===== Articles ===== */
#articles {
  background: transparent;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.article-grid article {
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition);
}

.article-grid article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.article-grid article:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(230, 57, 70, 0.25);
}

.article-grid article:hover::before {
  transform: scaleX(1);
}

.article-grid h3 {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.5;
}

.article-grid h3 a {
  color: var(--text);
  position: relative;
  transition: color var(--transition);
}

.article-grid h3 a:hover {
  color: var(--primary);
}

.article-grid time {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-light);
  letter-spacing: 0.02em;
}

.article-grid p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
  margin: 0;
}

.article-grid > article > a:last-child {
  align-self: flex-start;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 0;
  position: relative;
  transition: gap var(--transition), color var(--transition);
}

.article-grid > article > a:last-child::after {
  content: "→";
  transition: transform var(--transition);
}

.article-grid > article > a:last-child:hover {
  gap: 10px;
  color: var(--primary-dark);
}

.article-grid > article > a:last-child:hover::after {
  transform: translateX(4px);
}

/* ===== FAQ ===== */
#faq {
  background: transparent;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
}

.faq-list dt {
  margin: 0;
}

.faq-list dt button {
  width: 100%;
  text-align: left;
  padding: 20px 56px 20px 26px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text);
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.faq-list dt button::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 400;
  color: #fff;
  background: var(--grad-primary);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition);
  line-height: 1;
}

.faq-list dt button[aria-expanded="true"] {
  border-color: rgba(230, 57, 70, 0.35);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  box-shadow: var(--shadow-md);
}

.faq-list dt button[aria-expanded="true"]::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
}

.faq-list dt button:hover {
  transform: translateX(4px);
  border-color: rgba(230, 57, 70, 0.3);
}

.faq-list dd {
  margin: 0;
  padding: 0 26px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  color: var(--text-muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  line-height: 1.8;
  transition: max-height 0.45s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.35s ease, padding 0.35s ease;
}

.faq-list dd.open {
  max-height: 500px;
  opacity: 1;
  padding: 20px 26px 24px;
}

/* ===== HowTo ===== */
#howto {
  background: transparent;
}

#howto > p {
  padding: 16px 24px;
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  max-width: none;
}

#howto ol {
  counter-reset: howto-counter;
  gap: 14px;
}

#howto ol li {
  counter-increment: howto-counter;
  padding: 22px 26px 22px 74px;
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(69, 123, 157, 0.35);
}

#howto ol li::before {
  content: counter(howto-counter);
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  font-size: 0.92rem;
  background: var(--grad-secondary);
  box-shadow: 0 4px 12px rgba(69, 123, 157, 0.35);
}

/* ===== Contact ===== */
#contact {
  background: transparent;
}

#contact address {
  font-style: normal;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 24px 0 32px;
}

#contact address p {
  padding: 20px 24px;
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#contact address p:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(244, 162, 97, 0.4);
}

#contact address strong {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  font-weight: 700;
}

#contact address a {
  font-weight: 600;
  color: var(--secondary);
  word-break: break-all;
}

#contact address a:hover {
  color: var(--primary);
}

#contact h3 {
  display: inline-block;
  padding: 8px 20px;
  background: var(--grad-primary);
  color: #fff;
  border-radius: 50px;
  font-size: 1rem;
  box-shadow: 0 4px 14px rgba(230, 57, 70, 0.3);
  margin-top: 28px;
}

/* ===== Sitemap & Links ===== */
#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 24px;
}

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

#sitemap li::before,
#links li::before {
  display: none;
}

#sitemap a,
#links a {
  display: block;
  padding: 14px 20px;
  background: var(--grad-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.92rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), color var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

#sitemap a::before,
#links a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--grad-primary);
  transform: scaleY(0);
  transition: transform var(--transition);
}

#sitemap a:hover,
#links a:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  color: var(--primary);
  border-color: rgba(230, 57, 70, 0.3);
}

#sitemap a:hover::before,
#links a:hover::before {
  transform: scaleY(1);
}

/* ===== Legal ===== */
#legal {
  background: transparent;
  padding-bottom: 60px;
}

#legal h3 {
  font-size: 1.05rem;
  color: var(--secondary);
  margin-top: 28px;
  padding-left: 16px;
  border-left: 3px solid var(--secondary);
}

#legal p {
  font-size: 0.92rem;
}

/* ===== Footer ===== */
footer {
  background: var(--grad-hero);
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10% 20%, rgba(230, 57, 70, 0.18) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(69, 123, 157, 0.18) 0%, transparent 40%);
  pointer-events: none;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 24px 32px;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: center;
}

.footer-inner p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
}

.footer-inner p:first-child {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

.footer-inner a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(255, 255, 255, 0.3);
  transition: color var(--transition), text-decoration-color var(--transition);
}

.footer-inner a:hover {
  color: #fff;
  text-decoration-color: #fff;
}

/* ===== Back to Top ===== */
#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  background: var(--grad-primary);
  border-radius: 50%;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), box-shadow var(--transition);
  z-index: 999;
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 36px rgba(230, 57, 70, 0.5);
}

#back-to-top:active {
  transform: translateY(-2px) scale(0.96);
}

/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* ===== Focus Visible ===== */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== Responsive: Tablet ===== */
@media (max-width: 1024px) {
  .main-nav ul {
    gap: 0;
  }

  .main-nav a {
    padding: 8px 10px;
    font-size: 0.88rem;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    margin-top: -50px;
  }

  .section {
    padding: 56px 20px;
  }

  .article-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 18px;
  }
}

/* ===== Responsive: Mobile ===== */
@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }

  .header-inner {
    padding: 0 16px;
    gap: 10px;
  }

  .logo svg {
    width: 34px;
    height: 34px;
  }

  .logo-text {
    font-size: 1.15rem;
  }

  #menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--glass-bg);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.3s ease;
    opacity: 0;
    z-index: 999;
  }

  .main-nav.open {
    max-height: 80vh;
    overflow-y: auto;
    opacity: 1;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 20px;
    gap: 2px;
  }

  .main-nav a {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  .main-nav a::after {
    display: none;
  }

  .hero-slider {
    min-height: 440px;
  }

  .slide {
    padding: 32px 20px 90px;
  }

  .slide h1,
  .slide h2 {
    font-size: clamp(1.6rem, 7vw, 2.2rem);
  }

  .slide p {
    font-size: 0.95rem;
    margin-bottom: 28px;
  }

  .btn {
    padding: 12px 30px;
    font-size: 0.95rem;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: -40px;
    padding: 0 16px 32px;
  }

  .stat {
    padding: 18px 12px;
    border-radius: var(--radius);
  }

  .stat .num {
    font-size: 1.5rem;
  }

  .stat span:last-child {
    font-size: 0.76rem;
  }

  .breadcrumb {
    padding: 16px 16px 0;
  }

  .section {
    padding: 48px 16px;
  }

  .section > h2 {
    padding-left: 16px;
    margin-bottom: 22px;
  }

  .section > h2::before {
    width: 5px;
  }

  #brand-intro > p:first-of-type {
    padding: 22px 20px;
    font-size: 1rem;
  }

  #products ul {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  #products ul li {
    padding: 20px 20px 20px 46px;
  }

  #products ul li::before {
    left: 18px;
  }

  #products h4 {
    padding: 14px 18px;
    font-size: 1rem;
  }

  #solutions h3 {
    padding: 16px 20px;
    font-size: 1.05rem;
  }

  #solutions h3 + p {
    padding: 16px 20px;
  }

  #cases blockquote {
    padding: 24px 20px;
  }

  #cases blockquote p {
    padding-left: 22px;
    font-size: 0.94rem;
  }

  .news-list li {
    padding: 16px 18px;
    flex-direction: column;
    gap: 8px;
  }

  .news-list li:hover {
    padding-left: 24px;
  }

  .article-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .article-grid article {
    padding: 22px 20px;
  }

  .faq-list dt button {
    padding: 16px 52px 16px 20px;
    font-size: 0.95rem;
  }

  .faq-list dt button::after {
    right: 16px;
    width: 26px;
    height: 26px;
    font-size: 1.15rem;
  }

  .faq-list dd.open {
    padding: 16px 20px 20px;
  }

  #howto > p {
    padding: 14px 18px;
    font-size: 0.92rem;
  }

  #howto ol li {
    padding: 18px 20px 18px 66px;
  }

  #howto ol li::before {
    left: 18px;
    width: 30px;
    height: 30px;
  }

  #contact address {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  #contact address p {
    padding: 16px 20px;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  #sitemap a,
  #links a {
    padding: 12px 16px;
    font-size: 0.86rem;
  }

  .footer-inner {
    padding: 40px 16px 28px;
  }

  .footer-inner p {
    font-size: 0.84rem;
  }

  #back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
    font-size: 1.15rem;
  }
}

/* ===== Responsive: Small Mobile ===== */
@media (max-width: 400px) {
  .logo-text {
    font-size: 1rem;
  }

  .header-actions button {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .stat {
    padding: 14px 10px;
  }

  .stat .num {
    font-size: 1.3rem;
  }

  .section > h2 {
    font-size: 1.4rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr;
  }
}

/* ===== Print ===== */
@media print {
  #site-header,
  #back-to-top,
  .hero-slider,
  .hero-stats,
  .search-bar {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .section {
    padding: 20px 0;
    page-break-inside: avoid;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}