/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --bg: #0F0F11;
  --surface: #17181C;
  --surface-2: #1E2025;
  --primary: #DE7C3A;
  --primary-hover: #F08F4D;
  --primary-rgb: 222, 124, 58;
  --accent: #33C4C0;
  --text: #F0EEE7;
  --text-2: #99999E;
  --border: #27282D;
  --hot: #E0533D;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --header-h: 64px;
  --container-w: 1200px;
  --space-section: 96px;
  --space-section-m: 56px;
  --font: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: Inter, "DIN Alternate", -apple-system, "PingFang SC", sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  background-color: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color .2s ease; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; color: inherit; }
input, textarea, select { font-family: inherit; font-size: 14px; color: var(--text); }
input::placeholder, textarea::placeholder { color: #666; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: background .2s ease, box-shadow .2s ease, transform .2s ease, border-color .2s ease, color .2s ease;
  cursor: pointer;
  text-align: center;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #161410;
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(var(--primary-rgb), 0.25);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: rgba(240, 238, 231, 0.3);
}
.btn-ghost:hover {
  border-color: rgba(240, 238, 231, 0.6);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  transform: translateY(-2px);
}
.btn-ghost:active {
  transform: translateY(0);
}
.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

/* ===== Chips & Badges ===== */
.chip {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(var(--primary-rgb), 0.5);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.6;
  transition: background .2s ease, color .2s ease;
}
.chip:hover {
  background: rgba(var(--primary-rgb), 0.12);
  color: var(--primary-hover);
}
.badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  background: rgba(var(--primary-rgb), 0.15);
  color: var(--primary);
  border: 1px solid rgba(var(--primary-rgb), 0.2);
}
.badge-hot {
  background: rgba(224, 83, 61, 0.18);
  color: #ff8a72;
  border-color: rgba(224, 83, 61, 0.3);
}
.badge-accent {
  background: rgba(51, 196, 192, 0.12);
  color: var(--accent);
  border-color: rgba(51, 196, 192, 0.25);
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(15, 15, 17, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--header-h);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(222, 124, 58, 0.7);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}
.main-nav a {
  font-size: 15px;
  color: var(--text-2);
  position: relative;
  padding: 6px 2px;
  transition: color .2s ease;
}
.main-nav a:hover {
  color: var(--text);
}
.main-nav a.active {
  color: var(--text);
  font-weight: 600;
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.city-dropdown {
  position: relative;
}
.city-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease;
}
.city-btn:hover {
  border-color: rgba(var(--primary-rgb), 0.5);
  background: var(--surface-2);
}
.city-btn svg {
  width: 15px;
  height: 15px;
  fill: var(--primary);
  flex-shrink: 0;
}
.city-btn .chevron {
  width: 10px;
  height: 10px;
  fill: var(--text-2);
  transition: transform .25s ease;
}
.city-dropdown.open .chevron {
  transform: rotate(180deg);
}
.city-panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 220px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
  z-index: 50;
  box-shadow: var(--shadow);
}
.city-dropdown.open .city-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.city-panel a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-2);
  transition: background .2s ease, color .2s ease;
}
.city-panel a:hover {
  background: rgba(var(--primary-rgb), 0.15);
  color: var(--text);
}
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 20px 24px 28px;
  z-index: 99;
  box-shadow: 0 16px 24px rgba(0, 0, 0, 0.3);
}
.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
}
.mobile-menu a:last-child {
  border-bottom: none;
}
.mobile-menu a:hover {
  color: var(--text);
}
.mobile-menu .mobile-city {
  padding: 12px 0;
  font-size: 14px;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
}
.mobile-menu .btn {
  margin-top: 16px;
  width: 100%;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 80vh;
  min-height: 560px;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-h) + 20px);
  padding-bottom: 60px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(15, 15, 17, 0.92) 0%, rgba(15, 15, 17, 0.72) 55%, rgba(15, 15, 17, 0.35) 100%),
              linear-gradient(to top, var(--bg) 0%, transparent 35%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}
.hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.01em;
  margin-bottom: 22px;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}
.hero-sub {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(240, 238, 231, 0.85);
  margin-bottom: 32px;
  max-width: 600px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== Sections base ===== */
.section {
  padding: var(--space-section) 0;
  scroll-margin-top: var(--header-h);
}
.section-head {
  margin-bottom: 40px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
}
.section-head p {
  color: var(--text-2);
  font-size: 15px;
  max-width: 620px;
}
.section-head .head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.section-link {
  font-size: 14px;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.section-link:hover {
  color: var(--primary-hover);
}
.section-link .arrow {
  display: inline-block;
  transition: transform .2s ease;
}
.section-link:hover .arrow {
  transform: translateX(4px);
}

/* ===== Categories ===== */
.categories {
  background: var(--bg);
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  position: relative;
}
.category-card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--primary-rgb), 0.45);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(var(--primary-rgb), 0.12);
}
.cat-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(var(--primary-rgb), 0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--primary);
}
.cat-icon svg {
  width: 26px;
  height: 26px;
  fill: currentColor;
}
.category-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.category-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* ===== Stats ===== */
.stats-section {
  background: #121316;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 64px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
  margin-bottom: 48px;
}
.stat-item strong {
  display: block;
  font-family: var(--font-num);
  font-size: 46px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: 0.01em;
}
.stat-item span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-2);
}
.guarantee-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.guarantee-item {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
  padding: 0 8px;
}
.guarantee-item svg {
  width: 22px;
  height: 22px;
  fill: var(--accent);
  flex-shrink: 0;
}
.guarantee-item span {
  font-size: 14px;
  color: var(--text);
  white-space: nowrap;
}

/* ===== Recommend Horizontal ===== */
.recommend-section {
  background: var(--bg);
}
.h-scroll {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 8px 4px 24px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.h-scroll::-webkit-scrollbar {
  height: 6px;
}
.h-scroll::-webkit-scrollbar-track {
  background: transparent;
}
.h-scroll::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 6px;
}
.scroll-card {
  flex: 0 0 280px;
  scroll-snap-align: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.scroll-card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--primary-rgb), 0.45);
  box-shadow: var(--shadow);
}
.scroll-card .card-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, #1a1c21 0%, #22252b 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.scroll-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}
.scroll-card:hover .card-img img {
  transform: scale(1.03);
}
.hot-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(15, 15, 17, 0.75);
  border: 1px solid rgba(224, 83, 61, 0.35);
  color: #ff8a72;
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(6px);
}
.card-body {
  padding: 18px;
}
.card-body h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-body p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-tags {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.card-tags .tag {
  font-size: 12px;
  color: var(--primary);
}
.card-tags .time {
  font-size: 12px;
  color: var(--text-2);
}

/* ===== Plans ===== */
.plans-section {
  background: #121316;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.plan-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.plan-card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--primary-rgb), 0.35);
  box-shadow: var(--shadow);
}
.plan-card.featured {
  border: 1px solid var(--primary);
  box-shadow: 0 0 0 1px var(--primary), 0 12px 36px rgba(0, 0, 0, 0.25);
}
.plan-flag {
  position: absolute;
  top: -12px;
  left: 28px;
  background: var(--primary);
  color: #161410;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
}
.plan-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}
.plan-card .plan-type {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 24px;
}
.plan-card ul {
  margin-bottom: 28px;
}
.plan-card ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-2);
  padding: 7px 0;
  line-height: 1.5;
}
.plan-card ul li svg {
  width: 16px;
  height: 16px;
  fill: var(--accent);
  flex-shrink: 0;
  margin-top: 3px;
}
.plan-card .plan-price {
  font-family: var(--font-num);
  font-size: 15px;
  color: var(--text);
  margin-bottom: 20px;
}

/* ===== News Section ===== */
.news-section {
  background: var(--bg);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-card {
  display: flex;
  align-items: center;
  gap: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  transition: background .2s ease, border-color .2s ease, transform .2s ease;
}
.news-card:hover {
  background: var(--surface-2);
  border-color: rgba(var(--primary-rgb), 0.35);
  transform: translateX(2px);
}
.news-thumb {
  width: 120px;
  height: 80px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
  background: linear-gradient(135deg, #1a1c21 0%, #22252b 100%);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}
.news-card:hover .news-thumb img {
  transform: scale(1.04);
}
.news-body {
  flex: 1;
  min-width: 0;
}
.news-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-body p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
}
.news-meta .time {
  font-size: 12px;
  color: var(--text-2);
}
.news-arrow {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-2);
  transition: color .2s ease, border-color .2s ease, transform .2s ease;
}
.news-card:hover .news-arrow {
  color: var(--primary);
  border-color: var(--primary);
  transform: translateX(3px);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}
.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  color: var(--text-2);
}
.empty-state p {
  font-size: 15px;
  color: var(--text-2);
  margin-bottom: 20px;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.faq-item.open {
  border-color: rgba(var(--primary-rgb), 0.4);
  box-shadow: 0 0 0 1px rgba(var(--primary-rgb), 0.08);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 22px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: background .2s ease;
}
.faq-q:hover {
  background: var(--surface-2);
}
.faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 400;
  color: var(--primary);
  transition: transform .3s ease;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  padding: 0 22px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.8;
  transition: max-height .3s ease, padding .3s ease;
}
.faq-item.open .faq-a {
  max-height: 300px;
  padding: 0 22px 20px;
}

/* ===== Contact ===== */
.contact-section {
  background: #121316;
  border-top: 1px solid var(--border);
}
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.contact-info h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 22px;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px 0;
}
.contact-item svg {
  width: 20px;
  height: 20px;
  fill: var(--primary);
  flex-shrink: 0;
  margin-top: 3px;
}
.contact-item .label {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 2px;
}
.contact-item .value {
  font-size: 15px;
  color: var(--text);
}
.contact-form-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
}
.contact-form-wrap h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 18px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
.form-group {
  margin-bottom: 14px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--text);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}
.contact-form-wrap .btn {
  width: 100%;
  margin-top: 6px;
}

/* ===== Footer ===== */
.site-footer {
  background: #0A0A0B;
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-col .fn {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-col p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-2);
  transition: color .2s ease;
}
.footer-col ul li a:hover {
  color: var(--primary);
}
.footer-col .area-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-col .area-list span {
  font-size: 13px;
  color: var(--text-2);
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: border-color .2s ease, color .2s ease;
}
.footer-col .area-list span:hover {
  border-color: rgba(var(--primary-rgb), 0.4);
  color: var(--text);
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-2);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .guarantee-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .plan-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .plan-card.featured {
    grid-column: span 2;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .contact-wrap {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 56px;
  }
  .container {
    padding: 0 16px;
  }
  .main-nav {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .city-btn .city-btn-text {
    display: none;
  }
  .city-btn {
    padding: 8px 10px;
  }
  .hero {
    min-height: auto;
    padding-top: calc(var(--header-h) + 30px);
    padding-bottom: 48px;
  }
  .hero h1 {
    font-size: 30px;
    line-height: 1.3;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .main-nav-open .mobile-menu {
    display: block;
  }
  .category-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-item strong {
    font-size: 36px;
  }
  .guarantee-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .guarantee-item {
    justify-content: flex-start;
  }
  .scroll-card {
    flex: 0 0 220px;
  }
  .plan-grid {
    grid-template-columns: 1fr;
  }
  .plan-card.featured {
    grid-column: auto;
  }
  .news-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 14px;
  }
  .news-thumb {
    width: 100%;
    height: 160px;
  }
  .news-arrow {
    position: absolute;
    right: 14px;
    bottom: 14px;
    width: 32px;
    height: 32px;
    font-size: 15px;
  }
  .news-body {
    padding-right: 30px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .contact-form-wrap {
    padding: 24px 18px;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 16px;
  }
  .logo-dot {
    width: 8px;
    height: 8px;
  }
  .hero-actions .btn {
    padding: 12px 18px;
    font-size: 14px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .stat-item strong {
    font-size: 32px;
  }
  .guarantee-item span {
    font-size: 12px;
  }
  .footer-bottom p {
    font-size: 12px;
  }
}

/* roulang page: article */
:root {
  --bg: #0F0F11;
  --surface: #17181C;
  --surface-2: #1E2025;
  --primary: #DE7C3A;
  --primary-hover: #F08F4D;
  --accent: #33C4C0;
  --text: #F0EEE7;
  --text-2: #99999E;
  --border: #27282D;
  --hot: #E0533D;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-full: 999px;
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.35);
  --header-h: 64px;
  --container: 1200px;
  --gutter: 24px;
}
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width:100%; display:block; }
a { color: inherit; }
button { font-family: inherit; }
.container { max-width: var(--container); margin:0 auto; padding:0 var(--gutter); }
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--header-h);
  background: rgba(15,15,17,0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap {
  position: relative;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.2px;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 14px rgba(222,124,58,0.75);
  flex-shrink: 0;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.main-nav a {
  position: relative;
  color: var(--text-2);
  font-size: 15px;
  text-decoration: none;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.main-nav a:hover { color: var(--text); }
.main-nav a.active { color: var(--text); border-bottom-color: var(--primary); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.city-picker {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all .2s ease;
}
.city-picker:hover, .city-picker:focus-within { color: var(--text); border-color: var(--primary); }
.city-picker svg { width: 14px; height: 14px; fill: var(--primary); }
.city-picker .caret { width: 0; height: 0; border-left: 5px solid transparent; border-right: 5px solid transparent; border-top: 5px solid var(--text-2); transition: transform .2s ease; }
.city-picker:hover .caret { transform: rotate(180deg); }
.city-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  min-width: 220px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px;
  display: none;
  z-index: 50;
  box-shadow: var(--shadow-hover);
}
.city-picker:hover .city-dropdown, .city-picker:focus-within .city-dropdown { display: block; }
.city-dropdown a {
  display: block;
  padding: 9px 14px;
  color: var(--text-2);
  font-size: 14px;
  text-decoration: none;
  border-radius: 8px;
  transition: all .18s ease;
}
.city-dropdown a:hover { background: rgba(222,124,58,0.12); color: var(--text); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn:focus-visible, a:focus-visible, button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #1A1210; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 6px 22px rgba(222,124,58,0.32); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(255,255,255,0.05); }
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 8px; }
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 8px;
}
.mobile-toggle:hover { color: var(--primary); }

/* ❖ 文章页主体 */
.article-main { padding: 0 0 80px; }
.article-wrap { max-width: 960px; margin: 0 auto; padding: 0 var(--gutter); }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 26px 0 0;
  font-size: 13px;
  color: var(--text-2);
}
.breadcrumb a { color: var(--text-2); text-decoration: none; transition: color .2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #555; }
.breadcrumb .current { color: var(--text); max-width: 260px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }

.article-header { padding: 34px 0 26px; }
.article-header h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.32;
  color: var(--text);
  letter-spacing: 0.2px;
  word-break: break-word;
  margin-bottom: 18px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  color: var(--text-2);
  font-size: 13px;
}
.article-meta .meta-item { display: inline-flex; align-items: center; gap: 6px; }
.article-meta .meta-item svg { width: 14px; height: 14px; fill: var(--text-2); }
.article-meta .meta-cat { color: var(--accent); }
.article-meta .meta-dot { width: 3px; height: 3px; border-radius: 50%; background: #555; }

.article-cover {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 10px;
  background: linear-gradient(135deg, #1E2025 0%, #141519 55%, #1A1B20 100%);
}
.article-cover::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(222,124,58,0.08), transparent 60%);
  pointer-events: none;
}
.article-cover img { width: 100%; aspect-ratio: 16/7; object-fit: cover; }

.article-layout { margin-top: 30px; }
.article-body {
  font-size: 16px;
  line-height: 1.85;
  color: #E6E4DE;
}
.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin: 40px 0 16px;
  line-height: 1.4;
  letter-spacing: 0.2px;
}
.article-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  margin: 30px 0 12px;
  line-height: 1.45;
}
.article-body p { margin-bottom: 24px; }
.article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; transition: color .2s; }
.article-body a:hover { color: var(--primary-hover); }
.article-body img { border-radius: 12px; border: 1px solid var(--border); margin: 12px 0 24px; }
.article-body blockquote {
  border-left: 3px solid var(--primary);
  background: var(--surface);
  padding: 18px 22px;
  border-radius: 0 10px 10px 0;
  color: var(--text-2);
  margin: 26px 0;
  font-style: normal;
}
.article-body ul, .article-body ol { padding-left: 26px; margin: 0 0 24px; }
.article-body ul li, .article-body ol li { margin-bottom: 9px; }
.article-body ul li::marker { color: var(--primary); }
.article-body strong { color: var(--text); font-weight: 700; }

.article-empty {
  text-align: center;
  padding: 70px 30px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}
.article-empty .empty-icon { font-size: 44px; margin-bottom: 16px; opacity: 0.6; }
.article-empty p { font-size: 18px; color: var(--text-2); margin-bottom: 24px; }
.article-empty .btn { margin: 0 4px; }

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 38px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(222,124,58,0.4);
  background: rgba(222,124,58,0.08);
  color: var(--primary);
  font-size: 13px;
  text-decoration: none;
  transition: all .2s ease;
}
.tag:hover { background: rgba(222,124,58,0.18); color: var(--primary-hover); }

.related-section { margin-top: 70px; }
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 26px;
}
.section-head h2 { font-size: 24px; font-weight: 700; color: var(--text); position: relative; }
.section-head h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--primary);
  border-radius: 2px;
  margin-right: 12px;
  vertical-align: -3px;
}
.more-link { color: var(--accent); font-size: 14px; text-decoration: none; transition: color .2s; }
.more-link:hover { color: var(--primary-hover); text-decoration: underline; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.related-card:hover { transform: translateY(-4px); border-color: rgba(222,124,58,0.45); box-shadow: var(--shadow-hover); }
.related-card .thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: linear-gradient(135deg, #1E2025, #141519);
}
.related-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.related-card:hover .thumb img { transform: scale(1.05); }
.related-card .card-body { padding: 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.related-card .card-title { font-size: 16px; font-weight: 600; color: var(--text); line-height: 1.4; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: color .2s; }
.related-card:hover .card-title { color: var(--primary-hover); }
.related-card .card-desc {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text-2); margin-top: auto; padding-top: 6px; }
.related-card .card-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: #555; }

.back-bar { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; padding-top: 10px; }

/* ❖ 页脚 */
.site-footer {
  background: #0A0A0B;
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 44px;
}
.footer-col .fn {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
}
.footer-col p { font-size: 14px; color: var(--text-2); line-height: 1.75; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 9px; }
.footer-col ul a { font-size: 14px; color: var(--text-2); text-decoration: none; transition: color .2s; }
.footer-col ul a:hover { color: var(--primary); }
.area-list { display: flex; flex-wrap: wrap; gap: 8px; }
.area-list span {
  display: inline-block;
  padding: 5px 13px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--text-2);
  transition: all .2s;
}
.area-list span:hover { color: var(--primary); border-color: rgba(222,124,58,0.45); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p { font-size: 13px; color: var(--text-2); }

/* ❖ 响应式 */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-header h1 { font-size: 32px; }
}
@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 14px 0 18px;
    gap: 0;
    box-shadow: 0 20px 40px rgba(0,0,0,0.45);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 13px 24px; border-bottom: 1px solid var(--border); font-size: 15px; }
  .main-nav a:last-child { border-bottom: none; }
  .main-nav a.active { color: var(--primary); border-bottom-color: transparent; }
  .mobile-toggle { display: inline-flex; }
  .city-picker { display: none; }
  .nav-right { gap: 10px; }
  .nav-right .btn-sm { padding: 8px 14px; }
  .logo { font-size: 16px; }
  .article-header h1 { font-size: 28px; }
  .article-wrap { padding: 0 16px; }
  .article-cover img { aspect-ratio: 16/9; }
  .article-body { font-size: 15px; line-height: 1.8; }
  .related-grid { grid-template-columns: 1fr; }
  .back-bar { flex-direction: column; align-items: stretch; }
  .back-bar .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom p { font-size: 12px; }
}
@media (max-width: 520px) {
  .nav-right .btn-sm { display: none; }
  .section-head h2 { font-size: 20px; }
  .article-meta { gap: 10px 14px; font-size: 12px; }
  .breadcrumb .current { max-width: 140px; }
}