/* roulang page: index */
:root {
  --color-primary: #0f766e;
  --color-primary-light: #14b8a6;
  --color-primary-dark: #134e4a;
  --color-accent: #d97706;
  --color-dark: #0f172a;
  --color-bg: #f8fafc;
  --color-card: #ffffff;
  --color-text: #1e293b;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --gradient-brand: linear-gradient(135deg, #0f766e 0%, #14b8a6 60%, #5eead4 100%);
  --gradient-accent: linear-gradient(135deg, #b45309, #f59e0b);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-card: 0 10px 30px rgba(15, 118, 110, 0.08);
  --shadow-hover: 0 20px 44px rgba(15, 118, 110, 0.16);
  --transition: all 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.85;
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--color-primary-dark);
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 2px;
}

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

.container {
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
}

.row {
  --bs-gutter-x: 24px;
}

.section {
  padding: 80px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  position: relative;
}
.section-head h2::after {
  content: "";
  display: block;
  width: 28px;
  height: 4px;
  border-radius: 2px;
  background: var(--gradient-brand);
  margin: 14px auto 0;
}
.section-head p {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 640px;
  margin: 12px auto 0;
  line-height: 1.7;
}

.btn {
  border-radius: var(--radius-sm);
  padding: 14px 28px;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.4;
  border: 2px solid transparent;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.btn:active {
  transform: translateY(0) scale(0.98);
}
.btn:focus {
  box-shadow: none;
}
.btn-brand {
  background: var(--gradient-brand);
  color: #fff;
  border: none;
}
.btn-brand:hover {
  color: #fff;
  box-shadow: 0 12px 28px rgba(15, 118, 110, 0.3);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.7);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: #fff;
}
.btn-outline-dark {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn-outline-dark:hover {
  background: rgba(15, 118, 110, 0.08);
  color: var(--color-primary-dark);
}
.btn-accent {
  background: var(--gradient-accent);
  color: #fff;
  border: none;
}
.btn-accent:hover {
  color: #fff;
  box-shadow: 0 12px 28px rgba(217, 119, 6, 0.35);
}
.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}
.w-100 {
  width: 100%;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}
.header-top {
  padding: 14px 0;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.brand-text {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  white-space: nowrap;
}
.header-search {
  display: flex;
  align-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  padding: 8px 18px;
  gap: 10px;
  transition: var(--transition);
}
.header-search:focus-within {
  border-color: var(--color-primary-light);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.12);
}
.header-search i {
  color: var(--color-muted);
  font-size: 0.875rem;
}
.header-search input {
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
  font-size: 0.9rem;
  color: var(--color-text);
}
.header-search input::placeholder {
  color: var(--color-muted);
}
.header-cta .btn {
  padding: 10px 24px;
  font-size: 0.9rem;
}

.channel-nav {
  background: #fff;
  border-top: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1020;
}
.channel-tabs {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 10px 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.channel-tabs::-webkit-scrollbar {
  display: none;
}
.channel-tabs li {
  flex-shrink: 0;
}
.tab-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  background: #f1f5f9;
  transition: var(--transition);
  border: 2px solid transparent;
}
.tab-link:hover {
  background: #ccfbf1;
  color: var(--color-primary-dark);
}
.tab-link.active {
  background: var(--gradient-brand);
  color: #fff;
  font-weight: 600;
}
.tab-link:focus-visible {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 2px;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background-color: var(--color-primary-dark);
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  z-index: -2;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.94) 0%, rgba(19, 78, 74, 0.88) 55%, rgba(94, 234, 212, 0.35) 100%);
  z-index: -1;
}
.hero-inner {
  padding: 80px 0 100px;
}
.hero-content {
  max-width: 560px;
}
.hero-content h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}
.hero-sub {
  font-size: 1.1rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 50px;
  padding: 10px 20px;
  backdrop-filter: blur(6px);
}
.stat-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
}
.stat-label {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.2;
}
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-img {
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
  max-height: 460px;
  object-fit: cover;
  width: 100%;
}
.float-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-size: 0.85rem;
  color: var(--color-text);
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}
.float-card.card-1 {
  top: 18px;
  left: -14px;
}
.float-card.card-2 {
  bottom: 24px;
  right: -8px;
}
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  display: inline-block;
  position: relative;
}
.pulse-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: rgba(34, 197, 94, 0.3);
  animation: pulse 1.6s ease-out infinite;
}
@keyframes pulse {
  0% {
    transform: scale(0.6);
    opacity: 1;
  }
  100% {
    transform: scale(1.6);
    opacity: 0;
  }
}
.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  line-height: 0;
  z-index: 1;
}
.hero-wave svg {
  width: 100%;
  height: 72px;
  display: block;
}

.tiers {
  background: var(--color-bg);
}
.tier-row {
  display: flex;
  align-items: stretch;
}
.tier-row .col-lg-4 {
  display: flex;
}
.tier-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  width: 100%;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.tier-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.tier-card.featured {
  border: 2px solid var(--color-primary-light);
  transform: scale(1.04);
  box-shadow: 0 18px 40px rgba(15, 118, 110, 0.18);
}
.tier-card.featured:hover {
  transform: scale(1.04) translateY(-4px);
  box-shadow: 0 24px 50px rgba(15, 118, 110, 0.24);
}
.tier-ribbon {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.tier-tag {
  position: absolute;
  top: 18px;
  right: -6px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px 0 0 20px;
  box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
}
.tier-num {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  font-size: 1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.tier-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}
.tier-for {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}
.tier-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  flex-grow: 1;
}
.tier-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text);
  padding: 7px 0;
  line-height: 1.5;
}
.tier-list li i {
  color: var(--color-primary-light);
  font-size: 0.85rem;
  width: 18px;
  text-align: center;
}
.tier-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ccfbf1;
  border-radius: 50px;
  padding: 8px 16px;
  font-size: 0.8rem;
  color: var(--color-primary-dark);
  margin-bottom: 20px;
  font-weight: 400;
}
.tier-badge span {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-primary);
}

.compare {
  background: #f0fdfa;
}
.compare-table-wrap {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
}
.compare-table {
  margin: 0;
  border-collapse: seperate;
  border-spacing: 0;
}
.compare-table thead th {
  background: var(--color-primary-dark);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 16px 18px;
  border: none;
  text-align: center;
  vertical-align: middle;
}
.compare-table thead th:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  text-align: left;
}
.compare-table thead th:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.compare-table tbody td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.9rem;
  vertical-align: middle;
  color: var(--color-text);
  transition: background 0.15s ease;
}
.compare-table tbody td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--color-text);
}
.compare-table tbody tr {
  cursor: default;
}
.compare-table tbody tr:hover td {
  background: #f8fafc;
}
.compare-table tbody tr:last-child td {
  border-bottom: none;
}
.compare-table .fa-check {
  color: var(--color-primary);
}
.compare-table .fa-minus {
  color: #cbd5e1;
}
.badge-recommend {
  display: inline-block;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 20px;
  margin-left: 6px;
  vertical-align: middle;
}
.compare-footer {
  text-align: center;
  margin-top: 32px;
}

.limited {
  background: var(--color-dark);
  padding: 64px 0;
}
.limited-inner {
  background: linear-gradient(135deg, #0f766e 0%, #14b8a6 70%, #5eead4 100%);
  border-radius: var(--radius-lg);
  padding: 56px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.limited-inner::before,
.limited-inner::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
}
.limited-inner::before {
  top: -80px;
  left: -60px;
}
.limited-inner::after {
  bottom: -90px;
  right: -50px;
}
.limited-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  box-shadow: 0 6px 16px rgba(217, 119, 6, 0.35);
}
.limited-inner h3 {
  color: #fff;
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.limited-desc {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  margin-bottom: 28px;
}
.countdown {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.cd-box {
  background: rgba(15, 23, 42, 0.75);
  border-radius: var(--radius-md);
  width: 70px;
  padding: 14px 6px;
  text-align: center;
}
.cd-box span {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.cd-box label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
  display: block;
}

.contact-section {
  background: var(--color-card);
}
.contact-left h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
}
.contact-left .contact-intro {
  color: var(--color-muted);
  margin-bottom: 28px;
  line-height: 1.8;
}
.contact-info {
  list-style: none;
  padding: 0;
  margin: 0;
}
.contact-info li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px 0;
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.6;
}
.contact-info li i {
  color: var(--color-primary);
  font-size: 1.1rem;
  width: 20px;
  text-align: center;
  margin-top: 3px;
}
.contact-info li .info-label {
  color: var(--color-muted);
  font-size: 0.8rem;
  display: block;
}
.contact-form-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-card);
}
.contact-form-card .form-control,
.contact-form-card .form-select {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.95rem;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 50px;
  transition: var(--transition);
}
.contact-form-card .form-control:focus,
.contact-form-card .form-select:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.12);
  background-color: #fff;
}
.contact-form-card .form-control::placeholder {
  color: var(--color-muted);
}
.contact-form-card textarea.form-control {
  min-height: 110px;
  resize: vertical;
}
.privacy-note {
  font-size: 0.8rem;
  color: var(--color-muted);
  text-align: center;
  margin-bottom: 0;
}

.news {
  background: var(--color-dark);
  color: #fff;
}
.news-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
  gap: 16px;
}
.news-header .section-head {
  margin-bottom: 0;
  text-align: left;
}
.news-header .section-head h2 {
  color: #fff;
}
.news-header .section-head h2::after {
  margin-left: 0;
}
.news-header .section-head p {
  color: #94a3b8;
}
.view-all {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #5eead4;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 16px;
  border: 1px solid rgba(94, 234, 212, 0.3);
  border-radius: 50px;
  transition: var(--transition);
}
.view-all:hover {
  background: rgba(94, 234, 212, 0.1);
  color: #fff;
  border-color: rgba(94, 234, 212, 0.6);
}
.news-card {
  display: block;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 100%;
  transition: var(--transition);
}
.news-card:hover {
  transform: translateY(-4px);
  border-color: rgba(94, 234, 212, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}
.news-cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-primary-dark);
}
.news-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  transition: transform 0.4s ease;
}
.news-card:hover .news-cover img {
  transform: scale(1.05);
}
.news-body {
  padding: 20px;
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}
.badge-tag {
  display: inline-block;
  background: rgba(94, 234, 212, 0.15);
  color: #5eead4;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 12px;
  border-radius: 20px;
}
.news-date {
  font-size: 0.75rem;
  color: #94a3b8;
}
.news-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-excerpt {
  font-size: 0.85rem;
  color: #94a3b8;
  line-height: 1.7;
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  text-align: center;
  padding: 60px 20px;
  color: #94a3b8;
}
.news-empty i {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
  color: #475569;
}
.news-empty p {
  font-size: 0.95rem;
  margin: 0;
}

.faq {
  background: var(--color-bg);
}
.faq .accordion {
  max-width: 820px;
  margin: 0 auto;
}
.accordion-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md) !important;
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.02);
}
.accordion-button {
  background: var(--color-card) !important;
  color: var(--color-text) !important;
  font-size: 1rem;
  font-weight: 600;
  padding: 20px 24px;
  border: none;
  box-shadow: none !important;
  transition: var(--transition);
}
.accordion-button:not(.collapsed) {
  color: var(--color-primary) !important;
  background: #f0fdfa !important;
}
.accordion-button:focus {
  box-shadow: none !important;
  border: none;
}
.accordion-button::after {
  background-image: none;
  content: "+";
  font-family: inherit;
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
}
.accordion-button:not(.collapsed)::after {
  transform: rotate(45deg);
  background-image: none;
  color: var(--color-primary);
}
.accordion-body {
  padding: 8px 24px 22px;
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  border-top: 1px solid #f1f5f9;
}

.site-footer {
  background: var(--color-dark);
  color: #94a3b8;
  padding-top: 64px;
}
.footer-top {
  padding-bottom: 40px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .brand-icon {
  width: 34px;
  height: 34px;
  font-size: 0.9rem;
}
.footer-brand .brand-text {
  color: #fff;
  font-size: 1.1rem;
}
.footer-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 0;
}
.footer-title {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-links a:hover {
  color: #5eead4;
}
.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.footer-contact li i {
  color: var(--color-primary-light);
  width: 16px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.15);
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.8rem;
}
.footer-bottom a {
  color: #64748b;
}
.footer-bottom a:hover {
  color: #5eead4;
}
.footer-external {
  display: flex;
  gap: 16px;
}

@media (max-width: 991.98px) {
  .hero {
    min-height: auto;
    padding: 60px 0;
  }
  .hero-inner {
    padding: 40px 0 80px;
  }
  .hero-visual {
    margin-top: 40px;
  }
  .tier-card.featured {
    transform: scale(1);
  }
  .tier-card.featured:hover {
    transform: translateY(-4px);
  }
  .footer-contact {
    margin-top: 8px;
  }
}

@media (max-width: 767.98px) {
  .section {
    padding: 48px 0;
  }
  .section-head {
    margin-bottom: 32px;
  }
  .contact-form-card {
    padding: 24px;
  }
  .compare-table-wrap {
    padding: 20px;
  }
  .channel-nav {
    top: 0;
  }
  .hero-stats {
    gap: 8px;
  }
  .stat-pill {
    padding: 8px 14px;
  }
  .stat-num {
    font-size: 1.2rem;
  }
  .float-card.card-1 {
    left: 8px;
  }
  .float-card.card-2 {
    right: 8px;
  }
  .btn {
    padding: 12px 22px;
  }
  .news-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
  .footer-external {
    justify-content: center;
  }
}

@media (max-width: 575.98px) {
  .header-search {
    display: none;
  }
  .hero-content h1 {
    font-size: 2rem;
  }
  .hero-sub {
    font-size: 1rem;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .countdown {
    gap: 8px;
  }
  .cd-box {
    width: 56px;
    padding: 10px 4px;
  }
  .cd-box span {
    font-size: 1.2rem;
  }
  .tier-card {
    padding: 24px 20px;
  }
}

/* roulang page: article */
:root {
  --color-primary: #0f766e;
  --color-primary-light: #14b8a6;
  --color-primary-dark: #134e4a;
  --color-accent: #d97706;
  --color-dark: #0f172a;
  --color-bg: #f8fafc;
  --color-card: #ffffff;
  --color-text: #1e293b;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --gradient-brand: linear-gradient(135deg, #0f766e 0%, #14b8a6 60%, #5eead4 100%);
  --gradient-accent: linear-gradient(135deg, #b45309, #f59e0b);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-card: 0 10px 30px rgba(15, 118, 110, 0.08);
  --shadow-hover: 0 20px 44px rgba(15, 118, 110, 0.16);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.85;
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ===== 按钮 ===== */
.btn {
  border-radius: var(--radius-sm);
  font-weight: 600;
  padding: 12px 28px;
  font-size: 0.95rem;
  border: none;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
}

.btn-brand {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.22);
}

.btn-brand:hover {
  color: #fff;
  filter: brightness(1.07);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-brand:active {
  transform: translateY(0) scale(0.97);
  filter: brightness(0.96);
}

.btn-accent {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 6px 18px rgba(217, 119, 6, 0.28);
}

.btn-accent:hover {
  color: #fff;
  filter: brightness(1.06);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(217, 119, 6, 0.32);
}

.btn-accent:active {
  transform: translateY(0) scale(0.97);
  filter: brightness(0.96);
}

.btn-lg {
  padding: 16px 38px;
  font-size: 1.05rem;
  border-radius: var(--radius-sm);
}

/* ===== 导航头部 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: #fff;
  box-shadow: 0 2px 16px rgba(15, 23, 42, 0.06);
}

.header-top {
  background: #fff;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--gradient-brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.15rem;
  box-shadow: 0 4px 12px rgba(15, 118, 110, 0.2);
  transition: transform 0.2s ease;
}

.brand-logo:hover .brand-icon {
  transform: rotate(-6deg) scale(1.04);
}

.brand-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

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

.header-search {
  display: flex;
  align-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0 16px;
  height: 42px;
  color: var(--color-muted);
  transition: all 0.2s ease;
  max-width: 340px;
}

.header-search:focus-within {
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.08);
}

.header-search input {
  border: none;
  background: transparent;
  outline: none;
  flex: 1;
  margin-left: 8px;
  font-size: 0.9rem;
  color: var(--color-text);
  font-family: var(--font-family);
}

.header-search input::placeholder {
  color: var(--color-muted);
}

.header-cta .btn {
  padding: 10px 22px;
  font-size: 0.92rem;
}

/* ===== 频道导航 ===== */
.channel-nav {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}

.channel-tabs {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 10px 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.channel-tabs li {
  flex-shrink: 0;
}

.tab-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-muted);
  background: transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
  border: 1px solid transparent;
}

.tab-link:hover {
  background: rgba(15, 118, 110, 0.06);
  color: var(--color-primary);
  border-color: rgba(15, 118, 110, 0.1);
}

.tab-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.tab-link:active {
  transform: scale(0.97);
}

.tab-link.active {
  background: var(--gradient-brand);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.22);
}

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
}

.breadcrumb-custom {
  font-size: 0.875rem;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb-custom a {
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease;
}

.breadcrumb-custom a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.breadcrumb-sep {
  color: #cbd5e1;
  font-size: 0.75rem;
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
  max-width: 240px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: inline-block;
}

/* ===== 文章头部 ===== */
.article-header {
  background: #fff;
  padding: 48px 0 32px;
}

.article-content-wrap {
  max-width: 760px;
  margin: 0 auto;
}

.article-header h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--color-muted);
  align-items: center;
}

.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-category {
  background: rgba(15, 118, 110, 0.08);
  color: var(--color-primary);
  padding: 4px 14px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.82rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.dot-sep {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #cbd5e1;
  display: inline-block;
  margin: 0 2px;
}

/* ===== 正文区 ===== */
.article-main {
  background: var(--color-bg);
  padding: 40px 0 64px;
}

.article-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px 52px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-text);
  word-break: break-word;
}

.article-body p {
  margin-bottom: 1.5em;
}

.article-body h2 {
  font-size: 1.45rem;
  font-weight: 700;
  margin: 2em 0 1em;
  padding-left: 16px;
  border-left: 4px solid var(--color-primary);
  line-height: 1.35;
  color: var(--color-primary-dark);
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 1.8em 0 0.8em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.5em 1.3em;
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: 0.45em;
}

.article-body blockquote {
  background: #f0fdfa;
  border-left: 4px solid var(--color-primary-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 22px;
  margin: 1.6em 0;
  color: var(--color-muted);
  font-style: normal;
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body code {
  background: #f1f5f9;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.9em;
  color: #be185d;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.article-body pre {
  background: var(--color-dark);
  color: #e2e8f0;
  padding: 22px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 1.6em 0;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
}

.article-body pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.article-body img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  margin: 1.6em 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.article-body table th,
.article-body table td {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
  font-size: 0.95rem;
}

.article-body table th {
  background: #f0fdfa;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.article-body table tr:hover td {
  background: #f8fafc;
}

.article-body a {
  color: var(--color-primary);
  border-bottom: 1px solid rgba(15, 118, 110, 0.3);
}

.article-body a:hover {
  color: var(--color-primary-dark);
  border-bottom-color: var(--color-primary);
}

.article-footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.tag-chip {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.82rem;
  padding: 5px 14px;
  border-radius: 999px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tag-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(15, 118, 110, 0.04);
  transform: translateY(-1px);
}

.tag-chip:active {
  transform: scale(0.96);
}

/* ===== 相关推荐 ===== */
.related-section {
  background: #f0fdfa;
  padding: 64px 0;
}

.section-title-wrap {
  margin-bottom: 32px;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.4;
}

.section-title-bar {
  width: 32px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-brand);
}

.view-all {
  font-size: 0.9rem;
  color: var(--color-primary);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.view-all:hover {
  color: var(--color-primary-dark);
  gap: 10px;
}

.related-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.related-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-5px);
  border-color: transparent;
}

.related-card .card-img {
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 16px;
  position: relative;
}

.related-card .card-img img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  display: block;
  transition: transform 0.35s ease;
}

.related-card:hover .card-img img {
  transform: scale(1.04);
}

.card-tag {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(15, 118, 110, 0.08);
  padding: 3px 10px;
  border-radius: 999px;
}

.card-date {
  font-size: 0.8rem;
  color: var(--color-muted);
}

.related-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 10px 0 8px;
  line-height: 1.45;
}

.related-card h3 a {
  color: var(--color-text);
}

.related-card h3 a:hover {
  color: var(--color-primary);
}

.related-card p {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.read-more {
  margin-top: auto;
  color: var(--color-primary);
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.read-more:hover {
  color: var(--color-primary-dark);
  gap: 10px;
}

/* ===== 返回入口 ===== */
.back-links {
  background: #fff;
  padding: 32px 0 64px;
}

.back-link-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 10px 0;
  transition: color 0.2s ease, gap 0.2s ease;
}

.back-link-item:hover {
  color: var(--color-primary);
  gap: 12px;
}

.back-link-item:active {
  transform: scale(0.98);
}

/* ===== CTA 深色区块 ===== */
.cta-section {
  background: var(--color-dark);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-section::after {
  content: "";
  position: absolute;
  bottom: -50%;
  left: -8%;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(217, 119, 6, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-inner {
  background: var(--gradient-brand);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  position: relative;
  z-index: 1;
  box-shadow: 0 20px 50px rgba(15, 118, 110, 0.3);
}

.cta-inner h2 {
  color: #fff;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.35;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.88);
  max-width: 620px;
  margin: 0 auto 28px;
  font-size: 1rem;
  line-height: 1.75;
}

/* ===== 空状态 ===== */
.empty-state {
  background: var(--color-bg);
  text-align: center;
  padding: 100px 24px;
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.empty-state .empty-icon {
  font-size: 3.2rem;
  color: var(--color-muted);
  margin-bottom: 20px;
  opacity: 0.6;
}

.empty-state h2 {
  font-size: 1.5rem;
  color: var(--color-text);
  font-weight: 700;
  margin-bottom: 10px;
}

.empty-state p {
  color: var(--color-muted);
  max-width: 400px;
  margin-bottom: 24px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 0;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand .brand-icon {
  width: 38px;
  height: 38px;
  font-size: 1rem;
  background: var(--gradient-brand);
}

.footer-brand .brand-text {
  font-size: 1.15rem;
  color: #fff;
}

.footer-desc {
  color: #94a3b8;
  font-size: 0.9rem;
  line-height: 1.75;
  max-width: 320px;
}

.footer-title {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.footer-links,
.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
}

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

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-primary-light);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: #94a3b8;
}

.footer-contact i {
  color: var(--color-primary-light);
  width: 18px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 40px;
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: #64748b;
}

.footer-bottom span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-external a {
  color: #64748b;
  transition: color 0.2s ease;
}

.footer-external a:hover {
  color: var(--color-primary-light);
}

/* ===== 响应式 ===== */
@media (max-width: 1199.98px) {
  .header-search {
    max-width: 260px;
  }
}

@media (max-width: 991.98px) {
  .article-card {
    padding: 36px 32px;
  }

  .cta-inner {
    padding: 40px 28px;
  }

  .related-card .card-img img {
    height: 150px;
  }
}

@media (max-width: 767.98px) {
  .brand-text {
    font-size: 1.05rem;
  }

  .header-top {
    padding: 10px 0;
  }

  .brand-icon {
    width: 36px;
    height: 36px;
    font-size: 0.95rem;
    border-radius: 10px;
  }

  .header-cta .btn {
    padding: 8px 16px;
    font-size: 0.85rem;
  }

  .article-header {
    padding: 28px 0 20px;
  }

  .article-header h1 {
    font-size: 1.5rem;
    margin-bottom: 14px;
  }

  .article-meta {
    gap: 8px;
  }

  .article-main {
    padding: 24px 0 48px;
  }

  .article-card {
    padding: 26px 20px;
    border-radius: var(--radius-md);
  }

  .article-body {
    font-size: 1rem;
  }

  .article-footer-meta {
    margin-top: 28px;
  }

  .related-section {
    padding: 40px 0;
  }

  .section-title-wrap {
    flex-direction: column;
    align-items: flex-start !important;
    gap: 12px;
  }

  .back-links {
    padding: 24px 0 48px;
  }

  .back-links .d-flex {
    flex-direction: column;
    align-items: flex-start !important;
  }

  .cta-section {
    padding: 40px 0;
  }

  .cta-inner {
    padding: 32px 20px;
    border-radius: var(--radius-md);
  }

  .cta-inner h2 {
    font-size: 1.35rem;
  }

  .cta-inner p {
    font-size: 0.9rem;
    margin-bottom: 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
  }

  .footer-bottom span {
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .article-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .dot-sep {
    display: none;
  }

  .empty-state {
    padding: 72px 20px;
  }

  .empty-state .empty-icon {
    font-size: 2.6rem;
  }

  .breadcrumb-current {
    max-width: 140px;
  }
}

/* roulang page: category1 */
:root {
  --color-primary: #0f766e;
  --color-primary-light: #14b8a6;
  --color-primary-dark: #134e4a;
  --color-accent: #d97706;
  --color-dark: #0f172a;
  --color-bg: #f8fafc;
  --color-card: #ffffff;
  --color-text: #1e293b;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --gradient-brand: linear-gradient(135deg, #0f766e 0%, #14b8a6 60%, #5eead4 100%);
  --gradient-accent: linear-gradient(135deg, #b45309, #f59e0b);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-card: 0 10px 30px rgba(15, 118, 110, 0.08);
  --shadow-hover: 0 20px 44px rgba(15, 118, 110, 0.16);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.85;
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease;
}

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

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

ul,
ol {
  list-style: none;
}

.container {
  max-width: 1200px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  box-shadow: 0 1px 12px rgba(15, 23, 42, .06);
}

.header-top {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient-brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 6px 16px rgba(15, 118, 110, .25);
  flex-shrink: 0;
}

.brand-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: .02em;
  white-space: nowrap;
}

.header-search {
  position: relative;
  max-width: 360px;
}

.header-search i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-muted);
  font-size: .9rem;
}

.header-search input {
  width: 100%;
  padding: 10px 16px 10px 40px;
  border: 1px solid var(--color-border);
  border-radius: 40px;
  background: var(--color-bg);
  font-size: .9rem;
  transition: all .2s;
}

.header-search input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, .12);
}

.header-cta .btn-brand {
  white-space: nowrap;
}

/* Buttons */
.btn {
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.btn-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-brand);
  color: #fff;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .9rem;
  border: 0;
  transition: all .2s ease;
  box-shadow: 0 6px 16px rgba(15, 118, 110, .2);
}

.btn-brand:hover {
  color: #fff;
  filter: brightness(1.05);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.btn-brand:active {
  transform: scale(.98);
}

.btn-brand:focus-visible,
.btn-outline-brand:focus-visible,
.btn-cta:focus-visible,
.btn-cta-submit:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-outline-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  background: transparent;
  transition: all .2s;
}

.btn-outline-brand:hover {
  background: rgba(15, 118, 110, .08);
  color: var(--color-primary-dark);
}

/* Channel nav */
.channel-nav {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}

.channel-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 10px 0;
  scrollbar-width: none;
  flex-wrap: nowrap;
}

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

.tab-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 40px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: .9rem;
  font-weight: 500;
  white-space: nowrap;
  transition: all .2s;
  border: 1px solid transparent;
}

.tab-link:hover {
  background: rgba(15, 118, 110, .08);
  color: var(--color-primary);
}

.tab-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.tab-link.active {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 6px 16px rgba(15, 118, 110, .25);
}

.tab-link.active:hover {
  color: #fff;
}

/* Page hero */
.page-hero {
  background: #f0fdfa;
  padding: 72px 0;
  text-align: center;
  border-bottom: 1px solid rgba(15, 118, 110, .08);
}

.page-kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(15, 118, 110, .08);
  color: var(--color-primary);
  padding: 6px 16px;
  border-radius: 40px;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.25;
}

.page-hero-desc {
  max-width: 760px;
  margin: 0 auto 22px;
  color: var(--color-muted);
  font-size: 1.05rem;
}

.page-hero-meta {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  color: var(--color-muted);
  font-size: .85rem;
}

.page-hero-meta i {
  color: var(--color-primary);
  margin-right: 4px;
}

/* Category main */
.category-main {
  padding: 72px 0;
}

.guide-group {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  margin-bottom: 28px;
  transition: box-shadow .2s ease, transform .2s ease;
}

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

.group-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
}

.group-num {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  border-radius: 14px;
  background: var(--gradient-brand);
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 14px rgba(15, 118, 110, .2);
}

.group-head h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.group-head p {
  color: var(--color-muted);
  font-size: .88rem;
  margin: 0;
}

.guide-list {
  display: flex;
  flex-direction: column;
}

.guide-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 12px;
  border-radius: var(--radius-md);
  transition: background .2s ease;
}

.guide-item:hover {
  background: rgba(15, 118, 110, .04);
}

.guide-icon {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: 12px;
  background: #ccfbf1;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.guide-content {
  flex: 1;
}

.guide-content h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.guide-content p {
  color: var(--color-muted);
  font-size: .9rem;
  margin: 0;
}

.guide-link {
  flex-shrink: 0;
  font-size: .85rem;
  color: var(--color-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding-top: 6px;
  margin-left: auto;
}

.guide-link:hover {
  color: var(--color-accent);
}

.guide-link i {
  font-size: .75rem;
  transition: transform .2s;
}

.guide-link:hover i {
  transform: translateX(3px);
}

/* Guide banner */
.guide-banner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 28px;
  min-height: 220px;
  box-shadow: var(--shadow-card);
}

.guide-banner img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.guide-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15, 23, 42, .7) 0%, rgba(15, 118, 110, .3) 100%);
  border-radius: var(--radius-lg);
}

.guide-banner-content {
  position: absolute;
  left: 28px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  color: #fff;
  max-width: 440px;
}

.banner-tag {
  display: inline-block;
  background: var(--gradient-accent);
  color: #fff;
  padding: 4px 12px;
  border-radius: 40px;
  font-size: .78rem;
  font-weight: 600;
  margin-bottom: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, .18);
}

.guide-banner-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.guide-banner-content p {
  font-size: .9rem;
  opacity: .9;
  margin: 0;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 120px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow .2s ease;
}

.sidebar-card:hover {
  box-shadow: var(--shadow-hover);
}

.sidebar-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-border);
}

.sidebar-card h3 i {
  color: var(--color-primary);
}

.about-thumb {
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.sidebar-card p {
  color: var(--color-muted);
  font-size: .88rem;
  margin-bottom: 14px;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-cloud a {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 40px;
  font-size: .8rem;
  color: var(--color-muted);
  transition: all .2s ease;
}

.tag-cloud a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: #f0fdfa;
}

.tag-cloud a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.sidebar-btn {
  width: 100%;
  justify-content: center;
  margin-top: 4px;
}

/* Process section */
.process-section {
  background: var(--color-dark);
  padding: 80px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, .08);
  color: var(--color-primary-light);
  padding: 6px 16px;
  border-radius: 40px;
  font-size: .82rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.process-section .section-tag {
  color: #5eead4;
}

.section-head h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
}

.section-head p {
  color: #94a3b8;
  font-size: .95rem;
  margin-top: 8px;
}

.section-title-bar {
  width: 28px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-brand);
  margin: 14px auto 0;
}

.process-card {
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  height: 100%;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}

.process-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, .08);
  border-color: rgba(94, 234, 212, .3);
}

.process-step {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: .95rem;
  box-shadow: 0 6px 14px rgba(217, 119, 6, .3);
}

.process-card h3 {
  color: #fff;
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-card p {
  color: #94a3b8;
  font-size: .88rem;
  margin: 0;
  line-height: 1.75;
}

/* Stats band */
.stats-band {
  background: var(--gradient-brand);
  padding: 56px 0;
}

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

.stat-item {
  text-align: center;
  padding: 20px;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--radius-md);
  transition: transform .2s, background .2s;
}

.stat-item:hover {
  background: rgba(255, 255, 255, .16);
  transform: translateY(-3px);
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.stat-label {
  color: rgba(255, 255, 255, .85);
  font-size: .88rem;
  margin-top: 4px;
}

/* FAQ */
.faq-section {
  padding: 80px 0;
}

.faq-list {
  max-width: 920px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  transition: box-shadow .2s ease, border-color .2s ease;
  overflow: hidden;
}

.faq-item.open {
  box-shadow: var(--shadow-card);
  border-color: rgba(15, 118, 110, .25);
}

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  transition: color .2s;
  margin: 0;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #f0fdfa;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform .3s ease, background .3s ease, color .3s ease;
}

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

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}

.faq-a-inner {
  padding: 0 22px 20px;
  color: var(--color-muted);
  font-size: .92rem;
  line-height: 1.8;
}

/* CTA section */
.cta-section {
  padding: 72px 0;
  background: #f0fdfa;
  border-top: 1px solid rgba(15, 118, 110, .08);
}

.cta-copy .section-tag {
  background: rgba(15, 118, 110, .08);
  color: var(--color-primary);
}

.cta-copy h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 14px;
  line-height: 1.35;
}

.cta-copy > p {
  color: var(--color-muted);
  font-size: .95rem;
  max-width: 480px;
}

.cta-points {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cta-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-size: .9rem;
  font-weight: 500;
}

.cta-points i {
  color: var(--color-primary);
  font-size: 1.05rem;
}

.contact-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.contact-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.custom-input,
.custom-select {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: .92rem;
  background: var(--color-bg);
  transition: all .2s ease;
  color: var(--color-text);
}

.custom-input::placeholder {
  color: #94a3b8;
}

.custom-input:focus,
.custom-select:focus {
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, .12);
  outline: none;
}

.btn-cta-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  background: var(--gradient-brand);
  color: #fff;
  padding: 13px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  transition: all .2s ease;
}

.btn-cta-submit:hover {
  filter: brightness(1.05);
  box-shadow: var(--shadow-hover);
  color: #fff;
  transform: translateY(-2px);
}

.btn-cta-submit:active {
  transform: scale(.98);
}

.form-note {
  font-size: .78rem;
  color: var(--color-muted);
  text-align: center;
  margin-top: 6px;
  margin-bottom: 0;
}

/* Footer */
.site-footer {
  background: var(--color-dark);
  color: #94a3b8;
  padding: 64px 0 0;
}

.footer-top {
  padding-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-brand .brand-icon {
  background: var(--gradient-brand);
  color: #fff;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.footer-brand .brand-text {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
}

.footer-desc {
  font-size: .9rem;
  color: #94a3b8;
  margin-top: 14px;
  max-width: 320px;
}

.footer-title {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-links li,
.footer-contact li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #94a3b8;
  font-size: .9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color .2s, padding-left .2s;
}

.footer-links a i {
  font-size: .75rem;
  color: var(--color-primary-light);
}

.footer-links a:hover {
  color: var(--color-primary-light);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .9rem;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: .8rem;
  color: #64748b;
}

.footer-external {
  margin-left: auto;
}

.footer-external a {
  color: #64748b;
  font-size: .8rem;
}

.footer-external a:hover {
  color: var(--color-primary-light);
}

/* Responsive */
@media (max-width: 991.98px) {
  .sidebar {
    position: static;
    margin-top: 32px;
  }

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

@media (max-width: 767.98px) {
  .page-hero {
    padding: 48px 0;
  }

  .page-hero-desc {
    font-size: .95rem;
  }

  .page-hero-meta {
    gap: 10px;
    font-size: .8rem;
  }

  .category-main,
  .faq-section,
  .process-section {
    padding: 56px 0;
  }

  .guide-group {
    padding: 20px;
  }

  .guide-item {
    gap: 14px;
  }

  .guide-content p {
    font-size: .85rem;
  }

  .guide-banner-content {
    left: 20px;
    right: 20px;
  }

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

  .process-card {
    margin-bottom: 16px;
  }

  .cta-section {
    padding: 48px 0;
  }

  .contact-card {
    padding: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .footer-external {
    margin-left: 0;
  }
}

@media (max-width: 575.98px) {
  .brand-text {
    font-size: 1.05rem;
  }

  .brand-icon {
    width: 34px;
    height: 34px;
    font-size: .95rem;
  }

  .header-top {
    padding: 10px 0;
  }

  .btn-brand {
    padding: 8px 16px;
    font-size: .82rem;
  }

  .tab-link {
    padding: 7px 14px;
    font-size: .84rem;
  }

  .page-hero h1 {
    font-size: 1.7rem;
  }

  .guide-item {
    flex-wrap: wrap;
  }

  .guide-content {
    flex: 1 1 calc(100% - 56px);
  }

  .guide-link {
    margin-left: 56px;
  }

  .group-head {
    align-items: flex-start;
  }

  .group-num {
    width: 40px;
    height: 40px;
    font-size: .95rem;
  }

  .group-head h2 {
    font-size: 1.15rem;
  }

  .guide-banner img,
  .guide-banner {
    height: 200px;
    min-height: 0;
  }

  .guide-banner-content p {
    font-size: .8rem;
  }

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

  .faq-q {
    padding: 16px;
    font-size: .92rem;
  }

  .faq-a-inner {
    padding: 0 16px 16px;
    font-size: .88rem;
  }

  .section-head h2 {
    font-size: 1.35rem;
  }
}