:root {
  --primary: #2F6B9E;
  --primary-hover: #24527C;
  --primary-active: #1C3E5F;
  --primary-light: #EAF1F8;
  --teal-brown: #8A6A4F;
  --amber: #C9A063;
  --bamboo: #5E8B7E;
  --bg-body: #F6F8FA;
  --bg-card: #FFFFFF;
  --bg-blue-light: #F1F5F9;
  --text-main: #1F2A37;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  --border: #E5EAF0;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 8px 24px rgba(31,42,55,0.06);
  --shadow-hover: 0 12px 32px rgba(31,42,55,0.12);
  --space-section: 88px;
  --space-section-mobile: 48px;
  --container-max: 1200px;
  --transition: 0.25s ease;
  --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-stack);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-main);
  background-color: var(--bg-body);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }
ul, ol { list-style: none; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ===== Header / Navigation ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px) saturate(180%);
  -webkit-backdrop-filter: blur(8px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

.nav-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 54px;
  padding: 0 16px;
  max-width: var(--container-max);
  margin: 0 auto;
}

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

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name-main {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
}

.brand-name-sub {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 1px;
}

.nav-search-wrap {
  display: flex;
  align-items: center;
  flex: 0 1 320px;
  justify-content: center;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-blue-light);
  border-radius: 20px;
  padding: 6px 14px;
  width: 100%;
  max-width: 320px;
  border: 1px solid transparent;
  transition: border-color var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary);
  background: #fff;
}

.search-box svg {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.search-box input {
  border: none;
  background: transparent;
  padding: 4px 8px;
  font-size: 13px;
  width: 100%;
  color: var(--text-main);
}

.search-box input:focus {
  outline: none;
}

.btn-publish {
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 20px;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-publish:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

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

/* Channel bar */
.nav-channel-row {
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.8);
}

.channel-bar {
  display: flex;
  align-items: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 16px;
  height: 42px;
  gap: 4px;
}

.channel-list {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
}

.channel-list::-webkit-scrollbar { display: none; }

.channel-list a {
  display: flex;
  align-items: center;
  height: 42px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition);
}

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

.channel-list a.active {
  color: var(--primary);
  font-weight: 600;
}

.channel-list a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--primary);
}

.channel-list a:hover::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--primary-light);
}

.hot-keywords {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  margin-left: 8px;
}

.hot-keywords span {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.hot-tag {
  display: inline-block;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.hot-tag:hover {
  background: var(--teal-brown);
  color: #fff;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
  padding: 110px 0 90px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.88);
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(255,255,255,0.72) 0%, rgba(255,255,255,0.55) 50%, rgba(246,248,250,1) 100%);
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-content {
  display: flex;
  align-items: center;
  gap: 56px;
}

.hero-text-col {
  flex: 1 1 58%;
}

.hero-visual-col {
  flex: 1 1 42%;
  position: relative;
}

.hero-visual-col img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-hover);
}

.hero-visual-col::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(to top, rgba(47,107,158,0.15), rgba(255,255,255,0.25));
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.25;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 560px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 16px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(47,107,158,0.25);
}

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

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--primary);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

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

.btn-amber {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--amber);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-amber:hover {
  background: #b89357;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(201,160,99,0.3);
}

/* Hero pain points */
.pain-points-row {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pain-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.pain-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.pain-card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
}

.pain-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.pain-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== Solutions ===== */
.solutions {
  padding: var(--space-section) 0;
  background: var(--bg-body);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-header h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.section-header p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.solution-card-large {
  grid-column: span 6;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.solution-card-large:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.solution-card-small {
  grid-column: span 3;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.solution-card-small:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.solution-cover {
  position: relative;
  overflow: hidden;
  height: 180px;
}

.solution-card-large .solution-cover {
  height: 220px;
}

.solution-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.solution-card-large:hover .solution-cover img,
.solution-card-small:hover .solution-cover img {
  transform: scale(1.03);
}

.solution-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(31,42,55,0.12), transparent 40%);
}

.solution-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  background: rgba(255,255,255,0.92);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 16px;
  backdrop-filter: blur(4px);
}

.solution-body {
  padding: 22px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.solution-body h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.solution-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  flex: 1;
}

.solution-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: color var(--transition), gap var(--transition);
}

.solution-link:hover {
  color: var(--primary-hover);
  gap: 10px;
}

/* Solutions bottom lists */
.solutions-bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 40px;
}

.activity-list-card,
.forum-list-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 28px;
}

.list-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.list-card-header h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.list-card-more {
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
}

.list-card-more:hover {
  text-decoration: underline;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.activity-item:last-child,
.forum-item:last-child {
  border-bottom: none;
}

.activity-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 50px;
  height: 54px;
  background: var(--primary-light);
  border-radius: 10px;
  color: var(--primary);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.2;
  flex-shrink: 0;
}

.activity-date small {
  font-size: 11px;
  font-weight: 400;
}

.activity-info {
  flex: 1;
}

.activity-info h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 2px;
}

.activity-info p {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.activity-btn {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 14px;
  border-radius: 16px;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.activity-btn:hover {
  background: var(--primary);
  color: #fff;
}

.forum-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.forum-item-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 12px;
  background: var(--teal-brown);
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}

.forum-item-badge.new {
  background: var(--bamboo);
}

.forum-item-info {
  flex: 1;
  min-width: 0;
}

.forum-item-info h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition);
}

.forum-item:hover .forum-item-info h4 {
  color: var(--primary);
}

.forum-item-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.forum-item-replies {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  font-weight: 500;
}

/* ===== Results / Stats ===== */
.results {
  background: var(--bg-blue-light);
  padding: var(--space-section) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.stat-item {
  text-align: center;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 30px 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.stat-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.stat-number {
  font-size: 40px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.story-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.story-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.story-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.story-cover {
  height: 170px;
  overflow: hidden;
}

.story-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.story-card:hover .story-cover img {
  transform: scale(1.05);
}

.story-body {
  padding: 20px;
}

.story-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.5;
}

.story-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}

.story-meta .tag {
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  padding: 2px 10px;
  font-size: 11px;
  font-weight: 500;
}

/* ===== Testimonials ===== */
.testimonials {
  padding: var(--space-section) 0;
  background: var(--bg-body);
}

.testimonial-header {
  position: relative;
}

.testimonial-header .quote-mark {
  font-size: 72px;
  line-height: 0.6;
  color: var(--primary-light);
  font-weight: 700;
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 0;
}

.testimonial-header h2,
.testimonial-header p {
  position: relative;
  z-index: 1;
}

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

.testimonial-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.testimonial-header-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.avatar.teal { background: #E8F0EC; color: var(--bamboo); }
.avatar.tan { background: #F4EEE6; color: var(--teal-brown); }
.avatar.amber { background: #F3EDDE; color: var(--amber); }

.testimonial-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.3;
}

.testimonial-role {
  font-size: 12px;
  color: var(--text-muted);
}

.testimonial-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 14px;
}

.testimonial-rating {
  display: flex;
  gap: 4px;
  color: var(--amber);
  font-size: 16px;
}

.testimonial-rating span::before {
  content: '🍵';
  font-size: 16px;
}

/* ===== CTA ===== */
.cta-section {
  padding: var(--space-section) 0;
  background: var(--bg-body);
}

.invitation-card {
  background: var(--primary);
  background-image: radial-gradient(circle at 15% 20%, rgba(255,255,255,0.08) 0%, transparent 40%);
  border-radius: 20px;
  padding: 48px 56px;
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 48px;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(47,107,158,0.28);
}

.invitation-card::before {
  content: '';
  position: absolute;
  inset: 18px;
  border: 2px dashed rgba(255,255,255,0.35);
  border-radius: 14px;
  pointer-events: none;
}

.invitation-badge {
  position: absolute;
  top: 28px;
  right: 28px;
  background: var(--amber);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 1px;
  transform: rotate(5deg);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.invitation-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.invitation-content h2 {
  color: #fff;
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 10px;
}

.invitation-content p {
  color: rgba(255,255,255,0.85);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 8px;
}

.invitation-cta-group {
  display: flex;
  gap: 12px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.invitation-cta-group .btn-white {
  background: #fff;
  color: var(--primary);
  font-weight: 600;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background var(--transition), transform var(--transition);
}

.invitation-cta-group .btn-white:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

.invitation-cta-group .btn-white-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.6);
  font-weight: 600;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background var(--transition), transform var(--transition);
}

.invitation-cta-group .btn-white-outline:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
  background: var(--bg-blue-light);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.faq-item.open {
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--primary);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  gap: 20px;
  cursor: pointer;
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  transition: transform var(--transition), background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.3s ease;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.faq-item.open .faq-answer {
  padding: 0 24px 20px;
  max-height: 260px;
}

/* ===== Footer ===== */
.site-footer {
  background: #1F2A37;
  color: #C8D2DC;
  padding-top: 64px;
  padding-bottom: 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand .brand-group {
  margin-bottom: 16px;
}

.footer-brand .brand-logo {
  background: rgba(255,255,255,0.12);
}

.footer-brand .brand-name-main {
  color: #fff;
}

.footer-brand .brand-name-sub {
  color: #9CA3AF;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.75;
  color: #9CA3AF;
  margin-bottom: 16px;
  max-width: 260px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: #9CA3AF;
  transition: background var(--transition), color var(--transition);
}

.footer-social a:hover {
  background: var(--primary);
  color: #fff;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 13px;
  color: #9CA3AF;
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: var(--amber);
}

.footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-tags a {
  font-size: 12px;
  background: rgba(255,255,255,0.06);
  color: #9CA3AF;
  padding: 4px 12px;
  border-radius: 16px;
  transition: background var(--transition), color var(--transition);
}

.footer-tags a:hover {
  background: var(--amber);
  color: #1F2A37;
}

.footer-contact p {
  font-size: 13px;
  color: #9CA3AF;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-contact .icon {
  width: 16px;
  text-align: center;
  color: var(--amber);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 20px;
  text-align: center;
  font-size: 12px;
  color: #6B7280;
}

.footer-bottom a {
  color: #9CA3AF;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .solutions-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .solution-card-large {
    grid-column: span 6;
  }
  .solution-card-small {
    grid-column: span 3;
  }
  .solutions-bottom {
    grid-template-columns: 1fr;
  }
  .testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  :root {
    --space-section: var(--space-section-mobile);
  }
  
  .nav-brand-row {
    padding: 0 12px;
  }
  
  .brand-name-main {
    font-size: 14px;
  }
  
  .brand-name-sub {
    font-size: 10px;
  }
  
  .search-box {
    display: none;
  }
  
  .nav-search-wrap {
    flex: 0 0 auto;
  }
  
  .search-mobile-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-blue-light);
    color: var(--text-secondary);
  }
  
  .btn-publish {
    padding: 6px 14px;
    font-size: 12px;
  }
  
  .channel-bar {
    padding: 0 12px;
    height: 40px;
  }
  
  .hot-keywords {
    display: none;
  }
  
  .hero {
    padding: 72px 0 56px;
  }
  
  .hero-content {
    flex-direction: column;
    gap: 32px;
  }
  
  .hero-visual-col img {
    height: 220px;
  }
  
  .pain-points-row {
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 40px;
  }
  
  .solution-card-small {
    grid-column: span 6;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .stat-number {
    font-size: 32px;
  }
  
  .story-list {
    grid-template-columns: 1fr;
  }
  
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  
  .invitation-card {
    padding: 36px 24px;
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  
  .invitation-cta-group {
    justify-content: center;
  }
  
  .invitation-cta-group .btn-white,
  .invitation-cta-group .btn-white-outline {
    width: 100%;
    justify-content: center;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .hero h1 {
    font-size: 30px;
  }
  
  .hero-subtitle {
    font-size: 15px;
  }
  
  .section-header h2 {
    font-size: 24px;
  }
}

@media (max-width: 520px) {
  .hero-cta-group {
    flex-direction: column;
  }
  
  .hero-cta-group .btn-primary,
  .hero-cta-group .btn-outline {
    width: 100%;
    justify-content: center;
  }
  
  .solution-card-large .solution-cover {
    height: 180px;
  }
  
  .faq-question {
    padding: 14px 16px;
    font-size: 14px;
  }
  
  .faq-answer {
    padding: 0 16px;
  }
  
  .faq-item.open .faq-answer {
    padding: 0 16px 16px;
  }
}