/* roulang page: index */
:root {
  --bg: #0A0A12;
  --bg-2: #12101E;
  --card: #151526;
  --card-2: #1C1B2E;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(124,58,237,0.4);
  --primary: #7C3AED;
  --primary-2: #A855F7;
  --pink: #EC4899;
  --cyan: #22D3EE;
  --text: #F2F1FA;
  --text-2: #A5A3C0;
  --text-3: #6E6C8A;
  --success: #34D399;
  --warning: #FBBF24;
  --error: #F87171;
  --grad: linear-gradient(135deg, #7C3AED, #A855F7);
  --grad-btn: linear-gradient(135deg, #7C3AED 0%, #EC4899 100%);
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-hover: 0 8px 40px rgba(124,58,237,0.25);
  --container: 1200px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
}

.section {
  padding: clamp(3rem, 6vw, 5rem) 0;
}

.section-head {
  max-width: 660px;
  margin: 0 auto 40px;
  text-align: center;
}

.section-head h2 {
  font-size: clamp(1.5rem, 2vw + 0.5rem, 2rem);
  font-weight: 700;
  line-height: 1.3;
}

.section-head p {
  color: var(--text-2);
  margin-top: 12px;
  font-size: 0.95rem;
}

.gradient-text {
  background: linear-gradient(135deg, #A855F7, #22D3EE);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  transition: all 0.25s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad-btn);
  color: #fff;
  box-shadow: 0 4px 18px rgba(124,58,237,0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 8px 28px rgba(124,58,237,0.4);
}

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

.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: #C4B5FD;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
  border-radius: 10px;
}

.btn-block {
  width: 100%;
}

.btn:focus-visible,
.search-btn:focus-visible,
.faq-q:focus-visible,
a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,10,18,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text);
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #7C3AED, #EC4899);
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-search {
  display: flex;
  align-items: center;
  position: relative;
}

.search-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-2);
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  transition: all 0.25s ease;
}

.search-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.search-input {
  width: 0;
  opacity: 0;
  position: absolute;
  right: 44px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 14px;
  color: var(--text);
  font-size: 0.88rem;
  transition: all 0.3s ease;
  pointer-events: none;
}

.header-search:focus-within .search-input {
  width: 200px;
  opacity: 1;
  pointer-events: auto;
}

.search-input:focus {
  outline: none;
  border-color: var(--cyan);
}

/* Channel Nav */
.channel-nav {
  border-top: 1px solid var(--border);
  background: rgba(10,10,18,0.92);
}

.channel-list {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.channel-item {
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-2);
  border: 1px solid var(--border);
  white-space: nowrap;
  transition: all 0.25s ease;
  flex-shrink: 0;
}

.channel-item:hover {
  color: var(--text);
  border-color: var(--border-hover);
}

.channel-item.active {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: clamp(3rem, 6vw, 5rem) 0;
  background:
    radial-gradient(ellipse at 18% 20%, rgba(124,58,237,0.28), transparent 52%),
    radial-gradient(ellipse at 82% 30%, rgba(236,72,153,0.16), transparent 50%),
    radial-gradient(ellipse at 50% 90%, rgba(34,211,238,0.1), transparent 45%),
    var(--bg);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(34,211,238,0.5);
  color: var(--cyan);
  font-size: 0.85rem;
  font-weight: 500;
}

.hero-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  flex-shrink: 0;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw + 1rem, 3.6rem);
  font-weight: 800;
  line-height: 1.2;
  margin: 20px 0 16px;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-2);
  max-width: 520px;
  margin-bottom: 28px;
}

.hero-ctas {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.hero-trust {
  color: var(--text-3);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.hero-trust .trust-num {
  color: var(--cyan);
  font-weight: 700;
}

.hero-visual {
  position: relative;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: -14px;
  background: linear-gradient(135deg, rgba(124,58,237,0.3), rgba(236,72,153,0.2));
  filter: blur(34px);
  z-index: -1;
  border-radius: 30px;
}

.hero-visual img {
  width: 100%;
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.float-card {
  position: absolute;
  bottom: 18px;
  left: -24px;
  background: rgba(28,27,46,0.92);
  border: 1px solid var(--border-hover);
  border-radius: 12px;
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--text);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 8px;
}

.float-card i {
  color: var(--cyan);
}

/* ===== Stats Bar ===== */
.stats-bar {
  position: relative;
  z-index: 5;
  margin-top: -28px;
  padding-bottom: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 28px 0;
}

.stat-item {
  text-align: center;
  padding: 0 16px;
}

.stat-item + .stat-item {
  border-left: 1px solid var(--border);
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--pink);
  line-height: 1.2;
}

.stat-label {
  margin-top: 6px;
  color: var(--text-2);
  font-size: 0.9rem;
}

/* ===== Plans ===== */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: stretch;
}

.plan-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  margin-top: 16px;
}

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

.plan-popular {
  border: 1.5px solid transparent;
  background: linear-gradient(var(--card), var(--card)) padding-box,
              linear-gradient(135deg, #7C3AED, #EC4899) border-box;
  box-shadow: 0 12px 40px rgba(124,58,237,0.22);
  margin-top: 0;
  padding-top: 38px;
}

.plan-popular:hover {
  box-shadow: 0 16px 48px rgba(124,58,237,0.32);
}

.popular-badge {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--pink);
  color: #fff;
  padding: 4px 18px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.plan-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(124,58,237,0.22), rgba(236,72,153,0.22));
  display: grid;
  place-items: center;
  font-size: 1.3rem;
  color: var(--cyan);
  margin-bottom: 18px;
}

.plan-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
}

.plan-desc {
  color: var(--text-2);
  font-size: 0.9rem;
  margin: 8px 0 18px;
}

.plan-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  flex: 1;
}

.plan-list li {
  display: flex;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-2);
  align-items: flex-start;
}

.plan-list li::before {
  content: "✓";
  color: var(--cyan);
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== Compare ===== */
.compare-section {
  background: var(--bg-2);
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.compare-col {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.compare-col.recommend {
  background: linear-gradient(135deg, rgba(124,58,237,0.14), rgba(236,72,153,0.08)), var(--card);
  border-color: var(--border-hover);
}

.compare-tag {
  display: inline-block;
  background: var(--pink);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.compare-name {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.compare-sub {
  font-size: 0.8rem;
  color: var(--text-3);
  margin-bottom: 16px;
}

.compare-row {
  padding: 11px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
}

.compare-row:last-child {
  border-bottom: none;
}

.compare-row i.fa-check {
  color: var(--cyan);
  font-size: 0.8rem;
  width: 16px;
  flex-shrink: 0;
}

.compare-row i.fa-minus {
  color: var(--text-3);
  font-size: 0.8rem;
  width: 16px;
  flex-shrink: 0;
}

/* ===== Time Limit ===== */
.time-band {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  background:
    linear-gradient(135deg, rgba(124,58,237,0.18), rgba(28,27,46,0.7)),
    repeating-linear-gradient(-45deg, rgba(255,255,255,0.02) 0 12px, transparent 12px 24px),
    var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.time-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.time-left h2 {
  font-size: clamp(1.4rem, 2vw, 1.9rem);
  font-weight: 700;
}

.time-left p {
  color: var(--text-2);
  margin-top: 6px;
  font-size: 0.95rem;
}

.countdown {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
}

.countdown .num {
  background: var(--card-2);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--pink);
  font-variant-numeric: tabular-nums;
  border: 1px solid var(--border);
  min-width: 72px;
  text-align: center;
}

.countdown .sep {
  color: var(--text-3);
  font-size: 1.6rem;
  font-weight: 300;
}

.time-cta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.time-cta .btn {
  animation: breathe 2s ease-in-out infinite;
}

.time-cta .time-note {
  color: var(--text-3);
  font-size: 0.82rem;
}

@keyframes breathe {
  0%, 100% {
    box-shadow: 0 4px 18px rgba(124,58,237,0.3), 0 0 0 0 rgba(236,72,153,0.4);
  }
  50% {
    box-shadow: 0 4px 18px rgba(124,58,237,0.3), 0 0 0 12px rgba(236,72,153,0);
  }
}

/* ===== News ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.news-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  display: flex;
  flex-direction: column;
}

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

.news-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-2);
}

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

.news-card:hover .news-thumb img {
  transform: scale(1.05);
}

.news-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.news-tag {
  align-self: flex-start;
  background: var(--grad);
  color: #fff;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
}

.news-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.9em;
}

.news-card p {
  color: var(--text-2);
  font-size: 0.88rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.8em;
}

.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  color: var(--text-3);
  font-size: 0.82rem;
}

.news-meta time {
  display: flex;
  align-items: center;
  gap: 5px;
}

.news-meta .read-more {
  color: var(--primary-2);
  font-weight: 500;
  transition: color 0.2s ease;
}

.news-meta .read-more:hover {
  color: var(--cyan);
}

.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 56px 20px;
  color: var(--text-3);
}

.news-empty-icon {
  font-size: 2.4rem;
  color: var(--text-3);
  margin-bottom: 12px;
  opacity: 0.6;
}

.news-empty p {
  font-size: 0.95rem;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-2);
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.faq-item.open {
  border-color: var(--border-hover);
}

.faq-q {
  width: 100%;
  background: transparent;
  border: none;
  padding: 18px 20px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  text-align: left;
  transition: color 0.2s ease;
}

.faq-q:hover {
  color: #C4B5FD;
}

.faq-icon {
  width: 24px;
  height: 24px;
  position: relative;
  flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.faq-icon::before {
  width: 14px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.faq-icon::after {
  width: 2px;
  height: 14px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.faq-item.open .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.faq-item.open .faq-icon::before {
  transform: translate(-50%, -50%) rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.3s ease;
  color: var(--text-2);
  font-size: 0.93rem;
  line-height: 1.75;
  padding: 0 20px;
}

.faq-item.open .faq-a {
  max-height: 320px;
  padding-bottom: 20px;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: start;
}

.contact-info h2 {
  font-size: clamp(1.5rem, 2vw, 1.9rem);
  font-weight: 700;
  margin-bottom: 14px;
}

.contact-info > p {
  color: var(--text-2);
  margin-bottom: 28px;
}

.info-item {
  display: flex;
  gap: 14px;
  margin-bottom: 18px;
  align-items: flex-start;
}

.info-item .info-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--cyan);
  font-size: 1rem;
  flex-shrink: 0;
}

.info-item .info-text {
  font-size: 0.92rem;
  color: var(--text-2);
}

.info-item .info-text strong {
  display: block;
  color: var(--text);
  font-size: 0.98rem;
  margin-bottom: 2px;
}

.contact-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
}

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

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-2);
  margin-bottom: 6px;
}

.form-group label .required {
  color: var(--error);
}

.form-control {
  width: 100%;
  background: #1A1A2E;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.92rem;
  transition: border-color 0.25s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--cyan);
}

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

.form-control.error {
  border-color: var(--error);
}

.form-error-msg {
  color: var(--error);
  font-size: 0.8rem;
  margin-top: 4px;
  display: none;
}

.form-error-msg.show {
  display: block;
}

.privacy {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 0.8rem;
  color: var(--text-3);
  margin: 16px 0 20px;
}

.privacy input[type="checkbox"] {
  accent-color: var(--primary);
  margin-top: 4px;
  flex-shrink: 0;
}

.form-submit {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.form-status {
  display: none;
  font-size: 0.88rem;
}

.form-status.loading {
  color: var(--text-2);
}

.form-status.loading i {
  animation: spin 1s linear infinite;
}

.form-status.success {
  color: var(--success);
}

.form-status.error {
  color: var(--error);
}

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

/* ===== Footer ===== */
.site-footer {
  background: #0D0C1A;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
}

.footer-col p {
  color: var(--text-3);
  font-size: 0.9rem;
  margin-top: 12px;
  line-height: 1.7;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
}

.footer-logo .logo-icon {
  width: 34px;
  height: 34px;
  font-size: 0.75rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul a {
  color: var(--text-2);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

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

.footer-contact li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--text-2);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.footer-contact i {
  color: var(--text-3);
  margin-top: 4px;
  width: 16px;
  flex-shrink: 0;
}

.footer-bottom {
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-3);
  font-size: 0.82rem;
}

.footer-bottom a {
  color: var(--text-3);
}

.footer-bottom a:hover {
  color: var(--cyan);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-visual {
    max-width: 600px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
  }

  .stat-item {
    padding: 18px 12px;
  }

  .stat-item:nth-child(3) {
    border-left: none;
  }

  .stat-item:nth-child(n+3) {
    border-top: 1px solid var(--border);
  }

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

  .plan-card:last-child {
    grid-column: 1 / -1;
  }

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

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

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-brand {
    height: 58px;
  }

  .logo {
    font-size: 1.1rem;
  }

  .search-input:focus-within {
    display: none;
  }

  .header-search:focus-within .search-input {
    width: 140px;
  }

  .time-wrap {
    flex-direction: column;
    align-items: flex-start;
  }

  .countdown .num {
    padding: 8px 14px;
    font-size: 1.8rem;
    min-width: 62px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-sub {
    font-size: 0.95rem;
  }

  .hero-ctas {
    flex-direction: column;
  }

  .hero-ctas .btn {
    width: 100%;
  }

  .float-card {
    left: 12px;
    bottom: 12px;
    font-size: 0.78rem;
    padding: 8px 12px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .stat-num {
    font-size: 1.7rem;
  }

  .plans-grid,
  .compare-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .plan-card:last-child {
    grid-column: auto;
  }

  .plan-popular {
    margin-top: 0;
  }

  .countdown {
    gap: 6px;
  }

  .countdown .num {
    padding: 6px 10px;
    font-size: 1.5rem;
    min-width: 50px;
  }

  .countdown .sep {
    font-size: 1.2rem;
  }

  .contact-form {
    padding: 20px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* roulang page: article */
:root {
  --primary: #7C3AED;
  --primary-light: #A855F7;
  --accent: #EC4899;
  --cyan: #22D3EE;
  --bg: #0A0A12;
  --bg-secondary: #12101E;
  --bg-card: #151526;
  --bg-elevated: #1C1B2E;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(124,58,237,0.4);
  --text: #F2F1FA;
  --text-secondary: #A5A3C0;
  --text-muted: #6E6C8A;
  --success: #34D399;
  --warning: #FBBF24;
  --error: #F87171;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-hover: 0 8px 40px rgba(124,58,237,0.25);
  --gradient-primary: linear-gradient(135deg, #7C3AED, #A855F7);
  --gradient-accent: linear-gradient(135deg, #EC4899, #A855F7);
  --container: 1200px;
  --gap: 20px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color .3s ease;
}

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

ul, ol {
  list-style-position: inside;
}

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

input, textarea, select {
  font-family: inherit;
  font-size: 0.95rem;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 32px);
  padding-right: clamp(16px, 4vw, 32px);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  border: 1px solid transparent;
  transition: all .3s ease;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(124,58,237,0.3);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  filter: brightness(1.1);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

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

.btn-secondary {
  background: transparent;
  border-color: rgba(255,255,255,0.18);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1rem;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,10,18,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.header-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.5px;
}

.logo:hover {
  color: var(--text);
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--gradient-primary);
  border-radius: 10px;
  font-size: 0.78rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-search {
  display: flex;
  align-items: center;
  gap: 6px;
}

.search-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  border: 1px solid var(--border);
  transition: all .3s;
}

.search-btn:hover {
  color: var(--cyan);
  border-color: var(--border-hover);
}

.search-input {
  width: 0;
  opacity: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.85rem;
  padding: 0;
  transition: width .35s ease, opacity .35s ease, padding .35s ease, border-color .3s;
}

.search-input.open {
  width: 170px;
  opacity: 1;
  padding: 8px 14px;
  border-color: var(--border);
}

.search-input:focus {
  outline: none;
  border-color: var(--cyan);
}

.channel-nav {
  border-top: 1px solid rgba(255,255,255,0.05);
}

.channel-list {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.channel-item {
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all .3s ease;
  flex-shrink: 0;
}

.channel-item:hover {
  border-color: var(--primary);
  color: var(--text);
}

.channel-item.active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 3.2rem 0 3.5rem;
  background:
    radial-gradient(ellipse 60% 55% at 15% 20%, rgba(124,58,237,0.22), transparent 65%),
    radial-gradient(ellipse 45% 40% at 85% 25%, rgba(236,72,153,0.14), transparent 60%),
    linear-gradient(135deg, #12101E 0%, #0A0A12 60%, #12101E 100%);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.6rem;
}

.breadcrumb a {
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color .3s;
}

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

.breadcrumb .sep {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.breadcrumb .current {
  color: var(--text);
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-hero h1 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.5px;
  max-width: 860px;
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, #F2F1FA 30%, #A855F7 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
}

.meta-item i {
  color: var(--cyan);
  font-size: 0.8rem;
}

.meta-item.official i {
  color: var(--success);
}

/* ===== Article Section ===== */
.article-section {
  padding: 3rem 0 4rem;
  background: var(--bg);
}

.article-content {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1.8rem, 3.5vw, 3rem);
  box-shadow: var(--shadow);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.article-content p {
  margin-bottom: 1.25em;
}

.article-content h2,
.article-content h3,
.article-content h4 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.article-content h2 {
  font-size: 1.4rem;
}

.article-content h3 {
  font-size: 1.1rem;
}

.article-content h4 {
  font-size: 1rem;
}

.article-content a {
  color: var(--primary-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-content a:hover {
  color: var(--cyan);
}

.article-content img {
  width: 100%;
  border-radius: var(--radius-lg);
  margin: 1.8rem 0;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(124,58,237,0.07);
  padding: 1.1rem 1.4rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text);
  font-style: normal;
  margin: 1.5rem 0;
}

.article-content ul,
.article-content ol {
  margin: 1.2rem 0;
  padding-left: 1.2rem;
}

.article-content ul li,
.article-content ol li {
  margin-bottom: 0.5rem;
}

.article-content ul li::marker {
  color: var(--primary-light);
}

.article-content code {
  background: rgba(124,58,237,0.12);
  color: var(--cyan);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.88em;
}

.article-content pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.article-content pre code {
  background: none;
  color: var(--text);
  padding: 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}

.article-content th {
  background: var(--bg-elevated);
  color: var(--text);
  font-weight: 600;
}

.article-content td {
  color: var(--text-secondary);
}

/* ===== Article Empty ===== */
.article-empty {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  padding: 4rem 2rem;
}

.empty-icon {
  width: 84px;
  height: 84px;
  margin: 0 auto 1.4rem;
  border-radius: 50%;
  background: rgba(124,58,237,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--primary-light);
}

.article-empty h2 {
  font-size: 1.5rem;
  margin-bottom: 0.6rem;
}

.article-empty p {
  color: var(--text-secondary);
  margin-bottom: 1.8rem;
}

/* ===== Article Footer (tags, post nav) ===== */
.article-footer {
  max-width: 760px;
  margin: 0 auto;
  padding-top: 2.2rem;
}

.tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 2.4rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 16px;
  border-radius: var(--radius-pill);
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.25);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
}

.tag i {
  color: var(--primary-light);
  font-size: 0.7rem;
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 2.4rem;
}

.post-nav-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all .3s ease;
}

.post-nav-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.post-nav-card.next {
  flex-direction: row-reverse;
  text-align: right;
}

.nav-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(124,58,237,0.12);
  color: var(--primary-light);
  font-size: 0.9rem;
  flex-shrink: 0;
}

.nav-body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.nav-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.nav-title {
  font-size: 0.92rem;
  color: var(--text);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.post-nav-card:hover .nav-title {
  color: var(--primary-light);
}

.back-to-list {
  display: flex;
  justify-content: center;
  padding: 0.6rem 0 1rem;
}

/* ===== Related Section ===== */
.related-section {
  padding: 4rem 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.section-head {
  text-align: center;
  margin-bottom: 2.6rem;
}

.section-head h2 {
  font-size: clamp(1.5rem, 2vw + 0.5rem, 2rem);
  margin-bottom: 0.5rem;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.related-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  transition: all .3s ease;
  box-shadow: var(--shadow);
}

.related-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}

.related-cover {
  position: relative;
  aspect-ratio: 360 / 200;
  overflow: hidden;
}

.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}

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

.related-cover .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  z-index: 2;
}

.related-body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.related-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.read-more {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--primary-light);
  font-weight: 600;
}

.read-more i {
  transition: transform .3s;
}

.related-card:hover .read-more i {
  transform: translateX(4px);
}

/* ===== Article CTA ===== */
.article-cta {
  position: relative;
  padding: 4.5rem 0;
  background:
    linear-gradient(135deg, rgba(10,10,18,0.96), rgba(124,58,237,0.85)),
    url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  border-top: 1px solid var(--border);
}

.article-cta .container {
  position: relative;
  z-index: 2;
  text-align: center;
}

.article-cta h2 {
  font-size: clamp(1.6rem, 2.4vw, 2.2rem);
  color: #fff;
  margin-bottom: 0.6rem;
}

.article-cta p {
  color: rgba(255,255,255,0.75);
  font-size: 0.95rem;
  margin-bottom: 1.8rem;
}

.cta-contact-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 2.2rem;
}

.cta-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-pill);
  color: #fff;
  font-size: 0.9rem;
  backdrop-filter: blur(4px);
}

.cta-item i {
  color: var(--cyan);
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.cta-actions .btn-primary {
  background: var(--gradient-accent);
}

.cta-actions .btn-secondary {
  border-color: rgba(255,255,255,0.3);
  color: #fff;
}

.cta-actions .btn-secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ===== Footer ===== */
.site-footer {
  background: #0D0C1A;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 3.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 2.4rem;
  padding-bottom: 2.5rem;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  margin-bottom: 12px;
}

.footer-col p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-top: 12px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
}

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

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

.footer-col ul a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  text-decoration: none;
  transition: color .3s;
}

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

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.footer-contact i {
  color: var(--primary-light);
  font-size: 0.85rem;
  width: 16px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 1.4rem 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===== Focus visibility for all interactive ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(124,58,237,0.3);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-card:last-child {
    grid-column: 1 / -1;
  }

  .related-cover {
    aspect-ratio: 360 / 200;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-brand {
    height: 60px;
  }

  .logo {
    font-size: 1.05rem;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 0.72rem;
  }

  .search-input.open {
    width: 130px;
  }

  .btn-sm {
    padding: 7px 14px;
    font-size: 0.8rem;
  }

  .article-hero {
    padding: 2.2rem 0 2.5rem;
  }

  .article-hero h1 {
    font-size: 1.6rem;
  }

  .article-content {
    padding: 1.6rem;
  }

  .post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav-card.next {
    flex-direction: row;
    text-align: left;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.8rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .related-grid {
    grid-template-columns: 1fr;
  }

  .related-card:last-child {
    grid-column: auto;
  }

  .related-cover {
    aspect-ratio: 16 / 10;
  }

  .article-meta {
    gap: 8px;
  }

  .meta-item {
    padding: 4px 10px;
    font-size: 0.78rem;
  }

  .cta-contact-row {
    flex-direction: column;
    align-items: center;
  }

  .cta-item {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .search-input.open {
    position: absolute;
    right: 118px;
    width: 140px;
  }

  .header-search {
    position: relative;
  }

  .article-content {
    padding: 1.3rem;
    border-radius: var(--radius-md);
  }

  .tags-wrap {
    gap: 6px;
  }

  .tag {
    font-size: 0.75rem;
    padding: 4px 12px;
  }
}

/* roulang page: category1 */
:root {
  --primary: #7C3AED;
  --primary-light: #A855F7;
  --accent: #EC4899;
  --cyan: #22D3EE;
  --bg-dark: #0A0A12;
  --bg-section: #12101E;
  --bg-card: #151526;
  --bg-elevated: #1C1B2E;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(124, 58, 237, 0.4);
  --text-main: #F2F1FA;
  --text-secondary: #A5A3C0;
  --text-muted: #6E6C8A;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 8px 40px rgba(124, 58, 237, 0.25);
  --transition: all 0.3s ease;
  --gradient-main: linear-gradient(135deg, #7C3AED, #EC4899);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.3s ease; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; background: none; border: none; color: inherit; }
input, textarea, select { font-family: inherit; }
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 32px);
  padding-right: clamp(16px, 4vw, 32px);
}
section { padding: clamp(3rem, 6vw, 5rem) 0; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all 0.3s ease;
  text-align: center;
  line-height: 1.4;
}
.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35);
}
.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.45);
  transform: translateY(-2px);
}
.btn-primary:active { transform: translateY(1px); }
.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--text-main);
}
.btn-secondary:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
  transform: translateY(-2px);
}
.btn-secondary:active { transform: translateY(1px); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  box-shadow: 0 0 0 5px rgba(124, 58, 237, 0.3);
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 18, 0.96);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.header-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--gradient-main);
  border-radius: 10px;
  font-size: 0.78rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}
.header-search:focus-within {
  border-color: var(--cyan);
  background: rgba(255, 255, 255, 0.09);
}
.search-btn { color: var(--text-secondary); font-size: 0.9rem; transition: color 0.3s; }
.search-btn:hover { color: var(--cyan); }
.search-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  width: 140px;
  font-size: 0.85rem;
}
.search-input::placeholder { color: var(--text-muted); }
.channel-nav {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  height: 48px;
}
.channel-list {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 12px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.channel-list::-webkit-scrollbar { display: none; }
.channel-item {
  display: inline-flex;
  align-items: center;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.12);
  white-space: nowrap;
  transition: all 0.3s ease;
  background: transparent;
}
.channel-item:hover {
  color: var(--text-main);
  border-color: var(--primary-light);
  background: rgba(124, 58, 237, 0.1);
}
.channel-item.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
}
.page-hero {
  position: relative;
  padding: clamp(3rem, 6vw, 4.5rem) 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(124, 58, 237, 0.28), transparent 50%),
    radial-gradient(ellipse at 80% 40%, rgba(236, 72, 153, 0.16), transparent 45%),
    linear-gradient(135deg, rgba(10, 10, 18, 0.94), rgba(18, 16, 30, 0.96)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  top: -60%;
  right: -10%;
  width: 50%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(34, 211, 238, 0.12), transparent 70%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-secondary); transition: color 0.3s; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb .sep { color: var(--text-muted); font-size: 0.7rem; }
.breadcrumb .current { color: var(--text-secondary); }
.page-hero h1 {
  font-size: clamp(2rem, 4vw + 0.5rem, 2.8rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 18px;
  max-width: 720px;
  letter-spacing: 0.02em;
}
.gradient-text {
  background: linear-gradient(135deg, var(--primary-light), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.85;
  margin-bottom: 24px;
}
.hero-tags { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
}
.hero-tag i { color: var(--cyan); font-size: 0.7rem; }
.intro-section { background: var(--bg-dark); }
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.intro-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-card);
}
.intro-image img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.intro-image:hover img { transform: scale(1.03); }
.intro-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), transparent 50%);
  pointer-events: none;
}
.intro-content h2 {
  font-size: clamp(1.5rem, 2vw, 2rem);
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.35;
}
.intro-content p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.85;
  font-size: 0.95rem;
}
.intro-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}
.intro-list-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
}
.intro-list-item i { color: var(--cyan); font-size: 0.7rem; }
.featured-section { background: var(--bg-dark); }
.section-header {
  text-align: center;
  margin-bottom: 42px;
}
.section-header h2 {
  font-size: clamp(1.5rem, 2vw, 2rem);
  font-weight: 700;
  margin-bottom: 10px;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}
.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.guide-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}
.guide-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}
.guide-card-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  flex-shrink: 0;
}
.guide-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.guide-card:hover .guide-card-image img { transform: scale(1.05); }
.card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  z-index: 2;
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.35);
}
.guide-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.guide-card-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.45;
}
.guide-card-body p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.card-link {
  color: var(--primary-light);
  font-size: 0.88rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.3s, gap 0.3s;
}
.card-link:hover { color: var(--cyan); gap: 10px; }
.features-section {
  background: var(--bg-section);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-item {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}
.feature-item:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
}
.feature-item .feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(34, 211, 238, 0.1));
  border-radius: 16px;
  font-size: 1.4rem;
  color: var(--cyan);
}
.feature-item h3 { font-size: 1.08rem; font-weight: 600; margin-bottom: 8px; }
.feature-item p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.65; }
.audience-section { background: var(--bg-dark); }
.audience-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  max-width: 860px;
  margin: 0 auto;
}
.audience-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-card);
  border-radius: 16px;
  padding: 22px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}
.audience-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.audience-item i {
  color: var(--accent);
  font-size: 1.2rem;
  margin-top: 4px;
  flex-shrink: 0;
}
.audience-item h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; }
.audience-item p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }
.faq-section {
  background: var(--bg-section);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-card);
  border-radius: 16px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item.active { border-color: var(--border-hover); }
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: color 0.3s;
  gap: 16px;
}
.faq-question:hover { color: var(--primary-light); }
.faq-icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--primary-light);
  border-radius: 2px;
  transition: all 0.35s ease;
}
.faq-icon::before {
  top: 9px;
  left: 3px;
  width: 14px;
  height: 2px;
}
.faq-icon::after {
  top: 3px;
  left: 9px;
  width: 2px;
  height: 14px;
}
.faq-item.active .faq-icon::after { transform: scaleY(0); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.75;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}
.cta-section {
  position: relative;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(124, 58, 237, 0.15), transparent 55%),
    radial-gradient(ellipse at 70% 30%, rgba(236, 72, 153, 0.1), transparent 45%),
    var(--bg-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  text-align: center;
  overflow: hidden;
}
.cta-section h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.35;
}
.cta-section p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 30px;
  font-size: 0.95rem;
  line-height: 1.7;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.site-footer {
  background: #0D0C1A;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 50px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 32px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.footer-col .logo-icon {
  width: 30px;
  height: 30px;
  font-size: 0.7rem;
}
.footer-col p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-main);
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: color 0.3s, padding-left 0.3s;
}
.footer-col ul li a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.footer-contact li i {
  color: var(--cyan);
  width: 16px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.8rem;
}
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .featured-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .intro-image img { height: 260px; }
  .audience-list { grid-template-columns: 1fr; }
  .header-search .search-input { width: 100px; }
  .footer-grid { gap: 28px; }
}
@media (max-width: 640px) {
  .header-brand { height: 58px; }
  .header-actions { gap: 10px; }
  .header-search { padding: 5px 10px; }
  .header-search .search-input { width: 80px; font-size: 0.8rem; }
  .btn { padding: 10px 20px; font-size: 0.88rem; }
  .btn-sm { padding: 7px 14px; font-size: 0.8rem; }
  .channel-list { gap: 8px; }
  .channel-item { padding: 5px 14px; font-size: 0.82rem; }
  .featured-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
  .hero-tags { flex-wrap: wrap; }
  .page-hero h1 { font-size: clamp(1.7rem, 4vw, 2.2rem); }
}