:root {
  --brand: #6c3ce9;
  --brand2: #ff5c8a;
  --brand3: #3cd6e9;
  --bg: #ffffff;
  --bg-soft: #f7f6ff;
  --fg: #1c1c28;
  --muted: #5b5b6b;
  --line: #e6e6f0;
  --card: #f7f6ff;
  --glass: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.55);
  --shadow-sm: 0 4px 14px rgba(28, 28, 40, 0.06);
  --shadow-md: 0 12px 30px rgba(108, 60, 233, 0.12);
  --shadow-lg: 0 18px 44px rgba(108, 60, 233, 0.18);
  --radius: 14px;
  --radius-lg: 20px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --header-h: 66px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.8;
  font-size: 16px;
  overflow-x: hidden;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
}

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

a:hover {
  text-decoration: underline;
}

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

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

::selection {
  background: rgba(108, 60, 233, 0.22);
  color: var(--fg);
}

/* ============ Header ============ */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.35s var(--ease), border-color 0.35s var(--ease);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 19px;
  color: var(--fg);
  white-space: nowrap;
  transition: color 0.25s var(--ease);
}

.logo:hover {
  text-decoration: none;
  color: var(--brand);
}

.logo .mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 6px 16px rgba(108, 60, 233, 0.32);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.logo:hover .mark {
  transform: rotate(-8deg) scale(1.06);
  box-shadow: 0 10px 22px rgba(255, 92, 138, 0.4);
}

nav.main-nav ul {
  display: flex;
  list-style: none;
  gap: 22px;
  flex-wrap: wrap;
}

nav.main-nav a {
  color: var(--fg);
  font-size: 15px;
  position: relative;
  padding: 4px 0;
  transition: color 0.25s var(--ease);
}

nav.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

nav.main-nav a:hover {
  color: var(--brand);
  text-decoration: none;
}

nav.main-nav a:hover::after {
  transform: scaleX(1);
}

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

.search-box {
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 4px 12px;
  background: var(--card);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.35s var(--ease);
}

.search-box:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(108, 60, 233, 0.14);
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  width: 130px;
  color: var(--fg);
  font-family: inherit;
}

.search-box input::placeholder {
  color: var(--muted);
  opacity: 0.8;
}

.search-box button {
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--brand);
  font-size: 14px;
  padding: 0 2px;
  transition: transform 0.25s var(--ease);
}

.search-box button:hover {
  transform: scale(1.18);
}

.theme-toggle {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s var(--ease), background-color 0.35s var(--ease), border-color 0.35s var(--ease);
}

.theme-toggle:hover {
  transform: rotate(20deg) scale(1.08);
  border-color: var(--brand);
}

.menu-toggle {
  display: none;
  border: none;
  background: transparent;
  font-size: 22px;
  cursor: pointer;
  color: var(--fg);
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
}

/* ============ Breadcrumb ============ */
.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  padding: 14px 20px;
}

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

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

.breadcrumb span {
  margin: 0 6px;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  background: linear-gradient(135deg, #f4f0ff 0%, #fff0f5 55%, #eefaff 100%);
  padding: 56px 0 48px;
  overflow: hidden;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.5;
  pointer-events: none;
}

.hero::before {
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(108, 60, 233, 0.35), transparent 70%);
  top: -120px;
  right: -60px;
  animation: floatBlob 14s ease-in-out infinite;
}

.hero::after {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(255, 92, 138, 0.3), transparent 70%);
  bottom: -140px;
  left: -80px;
  animation: floatBlob 18s ease-in-out infinite reverse;
}

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -24px) scale(1.08); }
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.3;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.hero h1 .hl {
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .lead {
  font-size: 17px;
  color: var(--muted);
  margin-bottom: 24px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 26px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), opacity 0.28s var(--ease), background-color 0.28s var(--ease);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color: #fff;
  box-shadow: 0 8px 22px rgba(108, 60, 233, 0.3);
}

.btn-primary:hover {
  opacity: 0.94;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(255, 92, 138, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-ghost {
  border: 1px solid var(--brand);
  color: var(--brand);
  background: transparent;
}

.btn-ghost:hover {
  background: var(--card);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.stats {
  display: flex;
  gap: 34px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.stat .num {
  font-size: 28px;
  font-weight: 700;
  color: var(--brand);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat .lbl {
  font-size: 13px;
  color: var(--muted);
}

.hero-visual {
  position: relative;
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-lg);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), background-color 0.35s var(--ease);
}

.hero-visual:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  box-shadow: 0 26px 60px rgba(108, 60, 233, 0.24);
}

.banner-slide {
  display: none;
  text-align: center;
  animation: fadeSlide 0.6s var(--ease);
}

.banner-slide.active {
  display: block;
}

.banner-slide svg {
  border-radius: 12px;
  width: 100%;
  height: auto;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(10px) scale(0.985); }
  to { opacity: 1; transform: none; }
}

.banner-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 14px;
}

.banner-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #d6cdf5;
  cursor: pointer;
  transition: width 0.3s var(--ease), background-color 0.3s var(--ease);
}

.banner-dots span:hover {
  background: var(--brand2);
}

.banner-dots span.active {
  width: 22px;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--brand), var(--brand2));
}

/* ============ Sections ============ */
section {
  padding: 56px 0;
}

section.alt {
  background: var(--bg-soft);
  transition: background-color 0.35s var(--ease);
}

h2.sec-title {
  font-size: 29px;
  margin-bottom: 10px;
  text-align: center;
  line-height: 1.35;
  letter-spacing: -0.3px;
}

h2.sec-title::after {
  content: "";
  display: block;
  width: 54px;
  height: 4px;
  margin: 14px auto 0;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--brand), var(--brand2));
}

p.sec-sub {
  text-align: center;
  color: var(--muted);
  max-width: 760px;
  margin: 0 auto 38px;
}

h3 {
  font-size: 21px;
  margin: 22px 0 10px;
  line-height: 1.45;
}

h4 {
  font-size: 17px;
  margin: 16px 0 8px;
  color: var(--brand);
  line-height: 1.5;
}

p {
  margin-bottom: 14px;
  color: #333;
}

/* ============ Grids ============ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

/* ============ Cards ============ */
.card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease), background-color 0.35s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(108, 60, 233, 0.06), rgba(255, 92, 138, 0.06));
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 60, 233, 0.35);
}

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

.card > * {
  position: relative;
}

.card h3 {
  margin-top: 0;
}

.card p {
  color: var(--muted);
  font-size: 15px;
}

.tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(108, 60, 233, 0.12), rgba(255, 92, 138, 0.12));
  color: var(--brand);
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 12px;
  margin-bottom: 10px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

/* ============ Articles ============ */
.article-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.article-item {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease), background-color 0.35s var(--ease);
}

.article-item::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.article-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 60, 233, 0.3);
}

.article-item:hover::after {
  transform: scaleX(1);
}

.article-item h4 {
  margin-top: 0;
  color: var(--fg);
  font-size: 17px;
  transition: color 0.25s var(--ease);
}

.article-item:hover h4 {
  color: var(--brand);
}

.article-item .meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}

.article-item p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 10px;
}

.article-item a {
  font-size: 14px;
  font-weight: 600;
  display: inline-block;
  transition: transform 0.25s var(--ease);
}

.article-item:hover a {
  transform: translateX(4px);
}

/* ============ FAQ ============ */
.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  background: #fff;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), background-color 0.35s var(--ease);
}

.faq-item:hover {
  border-color: rgba(108, 60, 233, 0.35);
}

.faq-item.open {
  border-color: rgba(108, 60, 233, 0.5);
  box-shadow: var(--shadow-sm);
}

.faq-q {
  width: 100%;
  text-align: left;
  padding: 16px 20px;
  background: transparent;
  border: none;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--fg);
  font-family: inherit;
  line-height: 1.6;
  transition: color 0.25s var(--ease);
}

.faq-q:hover {
  color: var(--brand);
}

.faq-q .ico {
  color: var(--brand);
  font-size: 18px;
  transition: transform 0.35s var(--ease);
  flex-shrink: 0;
  line-height: 1;
}

.faq-item.open .faq-q .ico {
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease), padding 0.4s var(--ease);
  padding: 0 20px;
}

.faq-item.open .faq-a {
  max-height: 900px;
  padding: 0 20px 18px;
}

.faq-a p {
  font-size: 15px;
  color: var(--muted);
  margin: 0;
}

/* ============ Steps ============ */
.steps {
  counter-reset: step;
  list-style: none;
}

.steps li {
  position: relative;
  padding: 16px 20px 16px 62px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 14px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease), background-color 0.35s var(--ease);
}

.steps li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(108, 60, 233, 0.3);
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 18px;
  top: 16px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(108, 60, 233, 0.28);
}

.steps li strong {
  display: block;
  margin-bottom: 4px;
}

.steps li span {
  font-size: 14px;
  color: var(--muted);
}

/* ============ Case cards ============ */
.case-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease), background-color 0.35s var(--ease);
}

.case-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--brand), var(--brand2));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.4s var(--ease);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 60, 233, 0.3);
}

.case-card:hover::before {
  transform: scaleY(1);
}

.case-card h3 {
  margin-top: 0;
}

.case-card .quote {
  font-style: italic;
  color: #444;
  border-left: 3px solid var(--brand);
  padding-left: 14px;
  margin: 12px 0;
  background: linear-gradient(90deg, rgba(108, 60, 233, 0.05), transparent);
  border-radius: 0 8px 8px 0;
  padding-top: 8px;
  padding-bottom: 8px;
}

.case-card .who {
  font-size: 13px;
  color: var(--muted);
}

/* ============ News ============ */
.news-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
  transition: transform 0.3s var(--ease);
}

.news-item:hover {
  transform: translateX(6px);
}

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

.news-date {
  min-width: 78px;
  font-size: 13px;
  color: var(--brand);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.news-item h4 {
  margin: 0 0 4px;
  color: var(--fg);
  transition: color 0.25s var(--ease);
}

.news-item:hover h4 {
  color: var(--brand);
}

.news-item p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

/* ============ Contact ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.contact-info p {
  margin-bottom: 10px;
}

.contact-info strong {
  color: var(--brand);
}

.contact-form {
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.35s var(--ease), border-color 0.35s var(--ease);
}

.contact-form h3 {
  margin-top: 0;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 12px;
  font-family: inherit;
  font-size: 14px;
  outline: none;
  background: #fff;
  color: var(--fg);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.35s var(--ease);
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(108, 60, 233, 0.14);
}

.contact-form textarea {
  min-height: 110px;
  resize: vertical;
}

.contact-form button {
  width: 100%;
}

/* ============ Footer ============ */
footer {
  background: #14142a;
  color: #c9c9dd;
  padding: 50px 0 24px;
  margin-top: 20px;
}

footer a {
  color: #b9aef5;
  transition: color 0.25s var(--ease);
}

footer a:hover {
  color: #fff;
  text-decoration: none;
}

footer h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 12px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 30px;
}

.footer-grid ul {
  list-style: none;
}

.footer-grid li {
  margin-bottom: 8px;
  font-size: 14px;
}

.footer-grid li a {
  position: relative;
  display: inline-block;
  transition: transform 0.25s var(--ease);
}

.footer-grid li a:hover {
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid #2a2a48;
  margin-top: 34px;
  padding-top: 20px;
  font-size: 13px;
  color: #8a8aa8;
  text-align: center;
}

.footer-bottom p {
  color: #8a8aa8;
  margin-bottom: 6px;
}

/* ============ Back to top ============ */
.back-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 20px;
  display: none;
  z-index: 120;
  box-shadow: 0 8px 20px rgba(108, 60, 233, 0.35);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.back-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 14px 28px rgba(255, 92, 138, 0.45);
}

/* ============ Reveal animation ============ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
  will-change: opacity, transform;
}

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

/* ============ Dark mode ============ */
body.dark {
  --bg: #12121c;
  --bg-soft: #171724;
  --fg: #ececf5;
  --muted: #a2a2b8;
  --line: #2b2b40;
  --card: #1b1b2b;
  --glass: rgba(24, 24, 38, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 44px rgba(0, 0, 0, 0.5);
}

body.dark p {
  color: #d2d2e0;
}

body.dark .card,
body.dark .article-item,
body.dark .faq-item,
body.dark .case-card,
body.dark .steps li,
body.dark .hero-visual {
  background: #1b1b2b;
}

body.dark .hero {
  background: linear-gradient(135deg, #1a1530 0%, #241528 55%, #121a2e 100%);
}

body.dark .hero::before {
  background: radial-gradient(circle, rgba(108, 60, 233, 0.45), transparent 70%);
}

body.dark .hero::after {
  background: radial-gradient(circle, rgba(255, 92, 138, 0.35), transparent 70%);
}

body.dark header.site-header {
  background: rgba(18, 18, 28, 0.94);
}

body.dark .search-box,
body.dark .theme-toggle {
  background: #1b1b2b;
}

body.dark .contact-form input,
body.dark .contact-form textarea {
  background: #1b1b2b;
  color: var(--fg);
}

body.dark .contact-form input::placeholder,
body.dark .contact-form textarea::placeholder {
  color: var(--muted);
}

body.dark .banner-dots span {
  background: #3a3a55;
}

body.dark .case-card .quote {
  color: #cfcfe0;
  background: linear-gradient(90deg, rgba(108, 60, 233, 0.12), transparent);
}

body.dark .footer-bottom,
body.dark .footer-bottom p {
  color: #7c7c98;
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 34px;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  nav.main-nav ul {
    gap: 16px;
  }

  nav.main-nav a {
    font-size: 14px;
  }
}

@media (max-width: 900px) {
  .hero-grid,
  .grid-3,
  .grid-2,
  .article-list,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  nav.main-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 16px 20px;
    box-shadow: var(--shadow-md);
    animation: navDrop 0.3s var(--ease);
  }

  @keyframes navDrop {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: none; }
  }

  nav.main-nav.open {
    display: block;
  }

  nav.main-nav ul {
    flex-direction: column;
    gap: 14px;
  }

  nav.main-nav a {
    display: block;
    padding: 6px 0;
    font-size: 15px;
  }

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

  .menu-toggle {
    display: flex;
  }

  .hero {
    padding: 40px 0 36px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero .lead {
    font-size: 16px;
  }

  .search-box input {
    width: 90px;
  }

  section {
    padding: 44px 0;
  }

  h2.sec-title {
    font-size: 24px;
  }

  .hero-visual:hover {
    transform: translateY(-3px);
  }

  .steps li:hover {
    transform: translateX(3px);
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    gap: 8px;
  }

  .logo {
    font-size: 16px;
  }

  .logo .mark {
    width: 30px;
    height: 30px;
    font-size: 13px;
  }

  .search-box {
    padding: 3px 8px;
  }

  .search-box input {
    width: 64px;
    font-size: 13px;
  }

  .theme-toggle,
  .menu-toggle {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  .hero h1 {
    font-size: 26px;
  }

  .hero-cta {
    gap: 10px;
  }

  .btn {
    padding: 11px 20px;
    font-size: 14px;
    flex: 1 1 auto;
    text-align: center;
  }

  .stats {
    gap: 22px;
    margin-top: 26px;
  }

  .stat .num {
    font-size: 23px;
  }

  .card,
  .case-card,
  .article-item,
  .contact-form {
    padding: 18px;
  }

  .faq-q {
    padding: 14px 16px;
    font-size: 15px;
  }

  .faq-a {
    padding: 0 16px;
  }

  .faq-item.open .faq-a {
    padding: 0 16px 16px;
  }

  .steps li {
    padding: 14px 16px 14px 56px;
  }

  .steps li::before {
    left: 14px;
    top: 14px;
    width: 28px;
    height: 28px;
    font-size: 13px;
  }

  .news-item {
    flex-direction: column;
    gap: 4px;
  }

  .news-date {
    min-width: 0;
  }

  .back-top {
    right: 14px;
    bottom: 14px;
    width: 42px;
    height: 42px;
    font-size: 18px;
  }
}

@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;
  }
}