/* roulang page: index */
:root {
  --bg-base: #F6FAFC;
  --bg-section: #EDF3F8;
  --bg-card: #FFFFFF;
  --primary: #3478A0;
  --primary-deep: #28618A;
  --accent: #C83E3E;
  --text-1: #1C2B36;
  --text-2: #516A78;
  --text-3: #8CA3AF;
  --line: #DFE8EF;
  --line-light: #EAF1F6;
  --shadow: 0 4px 20px rgba(52, 120, 160, 0.08);
  --shadow-hover: 0 10px 30px rgba(52, 120, 160, 0.14);
  --radius-card: 14px;
  --radius-btn: 8px;
  --radius-input: 8px;
  --transition: all 0.25s ease;
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "SF Pro SC", sans-serif;
  --font-num: Arial, "Helvetica Neue", Inter, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--bg-base);
  color: var(--text-1);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

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

ul, ol, li {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 36px;
}

/* ============ 左侧导航 ============ */
.side-nav {
  position: fixed;
  left: 0;
  top: 0;
  width: 240px;
  height: 100vh;
  background: #fff;
  border-right: 1px solid var(--line-light);
  z-index: 200;
  display: flex;
  flex-direction: column;
  padding: 32px 20px 24px;
  transition: var(--transition);
}

.brand-block {
  text-align: center;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line-light);
  margin-bottom: 20px;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-section);
  margin-bottom: 12px;
  border: 1px solid var(--line);
}

.logo-icon svg {
  width: 30px;
  height: 30px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 1.8;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: 0.5px;
}

.brand-tag {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 4px;
  letter-spacing: 0.3px;
}

.nav-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 48px;
  padding: 0 16px;
  border-radius: 10px;
  color: var(--text-2);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-item i {
  width: 18px;
  font-size: 16px;
  color: var(--text-3);
  transition: var(--transition);
}

.nav-item:hover {
  background: var(--bg-section);
  color: var(--text-1);
}

.nav-item:hover i {
  color: var(--primary);
}

.nav-item.active {
  background: #EAF2F8;
  color: var(--primary-deep);
  font-weight: 600;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 2px;
  background: var(--primary);
}

.nav-item.active i {
  color: var(--primary);
}

.nav-contact {
  padding-top: 16px;
  border-top: 1px solid var(--line-light);
}

.nav-contact-list {
  margin-bottom: 14px;
}

.nav-contact-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 8px;
}

.nav-contact-line i {
  width: 14px;
  font-size: 13px;
  color: var(--text-3);
  text-align: center;
}

.contact-btn {
  display: block;
  text-align: center;
  padding: 10px 0;
  border-radius: var(--radius-btn);
  border: 1.5px solid var(--primary);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

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

/* ============ 移动端顶部导航 ============ */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: #fff;
  border-bottom: 1px solid var(--line-light);
  z-index: 210;
  padding: 0 20px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 12px rgba(28, 43, 54, 0.05);
}

.mobile-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
}

.mobile-brand span {
  color: var(--primary);
}

.hamburger {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border-radius: 8px;
  transition: var(--transition);
}

.hamburger:hover {
  background: var(--bg-section);
}

.hamburger span {
  width: 20px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-drawer {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  z-index: 230;
  padding: 80px 24px 32px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.mobile-drawer.is-open {
  transform: translateX(0);
}

.mobile-drawer .drawer-close {
  position: absolute;
  top: 16px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text-2);
  background: var(--bg-section);
  transition: var(--transition);
}

.mobile-drawer .drawer-close:hover {
  color: var(--accent);
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.drawer-nav .nav-item {
  font-size: 17px;
  height: 54px;
}

.drawer-nav .nav-item::before {
  left: -24px;
}

.drawer-contact {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--line-light);
}

/* ============ 主内容区 ============ */
.main-wrapper {
  margin-left: 240px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 520px;
  height: 70vh;
  max-height: 820px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(rgba(28, 43, 54, 0.55), rgba(28, 43, 54, 0.55)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 580px;
  padding: 0 48px;
  width: 100%;
}

.hero-eyebrow {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 30px;
  padding: 6px 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.hero h1 .hl {
  color: #BFE3F2;
}

.hero-sub {
  font-size: 18px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 32px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  border: none;
}

.btn-primary:hover {
  background: #A93232;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(200, 62, 62, 0.25);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 32px;
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  transform: translateY(-2px);
}

.btn-outline:active {
  transform: scale(0.98);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat .num {
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.hero-stat .label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

.hero-stat-divider {
  width: 1px;
  height: 32px;
  background: rgba(255, 255, 255, 0.25);
}

.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 60px;
  z-index: 3;
  pointer-events: none;
}

/* ============ 板块通用 ============ */
.section-pad {
  padding: 88px 0;
}

.section-pad-sm {
  padding: 64px 0;
}

.section-bg-alt {
  background: var(--bg-section);
}

.section-header {
  margin-bottom: 48px;
}

.section-eyebrow {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-3);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-1);
  margin-bottom: 10px;
}

.section-desc {
  font-size: 14px;
  color: var(--text-2);
  max-width: 560px;
}

.section-header-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.view-all {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

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

/* ============ 服务卡片（错峰） ============ */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: start;
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card:nth-child(3) {
  transform: translateY(24px);
}

.service-card:nth-child(4) {
  grid-column: 2 / 3;
  justify-self: center;
  max-width: 100%;
  transform: translateY(-24px);
  width: 100%;
}

.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(18px);
}

.service-card:nth-child(3):hover {
  transform: translateY(14px);
}

.service-card:nth-child(4):hover {
  transform: translateY(-30px);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--bg-section);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 22px;
  color: var(--primary);
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: rgba(200, 62, 62, 0.08);
  color: var(--accent);
}

.service-card .badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 500;
}

.service-card h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 16px;
}

.card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

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

/* ============ 数据条 ============ */
.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--bg-section);
  border-radius: var(--radius-card);
  padding: 48px 24px;
  position: relative;
}

.data-item {
  text-align: center;
  padding: 0 24px;
  position: relative;
}

.data-item + .data-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--line-light);
}

.data-num {
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.data-divider {
  width: 24px;
  height: 2px;
  background: var(--accent);
  margin: 10px auto 12px;
  border-radius: 2px;
}

.data-label {
  font-size: 14px;
  color: var(--text-2);
}

/* ============ 案例 ============ */
.case-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.case-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line-light);
  transition: var(--transition);
}

.case-card:first-child {
  transform: translateY(0);
}

.case-card:last-child {
  transform: translateY(28px);
}

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

.case-card:hover .case-img img {
  transform: scale(1.03);
}

.case-img {
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

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

.case-body {
  padding: 24px;
}

.case-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  background: rgba(52, 120, 160, 0.08);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
  font-weight: 500;
}

.case-body h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 10px;
}

.case-body p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============ 解决方案 ============ */
.solution-wrap {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.sol-row {
  display: flex;
  align-items: center;
  gap: 56px;
}

.sol-row.reverse {
  flex-direction: row-reverse;
}

.sol-img {
  width: 55%;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  flex-shrink: 0;
}

.sol-img img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.sol-img:hover img {
  transform: scale(1.02);
}

.sol-text {
  width: 45%;
  flex-shrink: 0;
}

.sol-text h3 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 16px;
}

.sol-text > p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 20px;
}

.sol-list {
  margin-bottom: 24px;
}

.sol-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 10px;
}

.sol-list li i {
  color: var(--primary);
  font-size: 14px;
  width: 18px;
  text-align: center;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.btn-ghost:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}

.btn-ghost:active {
  transform: scale(0.98);
}

/* ============ 资讯列表 ============ */
.news-wrap {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  border: 1px solid var(--line-light);
  padding: 32px;
}

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

.news-row {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-light);
  transition: var(--transition);
}

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

.news-row:hover {
  background: rgba(237, 243, 248, 0.4);
}

.news-date {
  width: 64px;
  height: 64px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.news-date .day {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.1;
}

.news-date .month {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 2px;
}

.news-main {
  flex: 1;
  min-width: 0;
}

.news-main h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 4px;
  transition: var(--transition);
}

.news-main h3 a {
  color: inherit;
}

.news-main h3 a:hover {
  color: var(--primary);
}

.news-excerpt {
  font-size: 14px;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-cat {
  font-size: 13px;
  color: var(--primary);
  background: rgba(52, 120, 160, 0.08);
  padding: 4px 14px;
  border-radius: 20px;
  flex-shrink: 0;
  font-weight: 500;
}

.news-empty {
  background: var(--bg-section);
  border-radius: 14px;
  padding: 48px;
  text-align: center;
  color: var(--text-3);
}

.news-empty i {
  font-size: 32px;
  margin-bottom: 12px;
  color: var(--text-3);
}

.news-empty p {
  font-size: 14px;
}

/* ============ FAQ ============ */
.faq-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  align-items: start;
}

.faq-intro {
  position: sticky;
  top: 40px;
}

.faq-intro h2 {
  font-size: 30px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 16px;
}

.faq-intro p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 20px;
}

.accordion {
  background: transparent !important;
}

.accordion-item {
  background: var(--bg-card);
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  border: 1px solid var(--line-light);
  overflow: hidden;
  transition: var(--transition);
}

.accordion-item:hover {
  box-shadow: var(--shadow-hover);
}

.accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  background: transparent !important;
  position: relative;
  border-bottom: none !important;
}

.accordion-title::after {
  content: '\f078' !important;
  font-family: 'Font Awesome 6 Free' !important;
  font-weight: 900 !important;
  width: 28px !important;
  height: 28px !important;
  border: 1px solid var(--line) !important;
  border-radius: 50% !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  font-size: 11px !important;
  color: var(--text-2) !important;
  line-height: 1 !important;
  transition: var(--transition) !important;
  position: static !important;
  transform: none !important;
}

.accordion-item.is-active .accordion-title::after {
  transform: rotate(180deg) !important;
  color: var(--primary) !important;
  border-color: var(--primary) !important;
}

.accordion-content {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.7;
  border-bottom: none !important;
  background: transparent !important;
}

/* ============ 联系CTA ============ */
.contact-section-main {
  background: linear-gradient(135deg, var(--primary-deep), var(--primary));
  border-radius: 20px;
  overflow: hidden;
  padding: 56px;
  color: #fff;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: center;
}

.contact-info h2 {
  font-size: 28px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}

.contact-info > p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 28px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 32px;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
}

.contact-list li i {
  width: 20px;
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
}

.qr-placeholder {
  width: 120px;
  height: 120px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px dashed rgba(255, 255, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

.contact-form-card {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
}

.contact-form-card .form-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-1);
  margin-bottom: 6px;
}

.form-label .req {
  color: var(--accent);
  margin-left: 2px;
}

.form-control {
  width: 100%;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius-input);
  padding: 0 14px;
  font-size: 14px;
  color: var(--text-1);
  background: var(--bg-base);
  transition: var(--transition);
}

textarea.form-control {
  height: auto;
  min-height: 110px;
  padding: 12px 14px;
  resize: vertical;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(52, 120, 160, 0.15);
  background: #fff;
}

.form-control::placeholder {
  color: var(--text-3);
}

.btn-submit {
  width: 100%;
  height: 48px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-submit:hover {
  background: #A93232;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(200, 62, 62, 0.25);
}

.btn-submit:active {
  transform: scale(0.98);
}

.btn-submit.loading i {
  animation: spin 1s linear infinite;
}

.btn-submit.success {
  background: #2F8F5B;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ============ 页脚 ============ */
.footer {
  background: var(--bg-section);
  border-top: 1px solid var(--line);
  padding: 64px 0 0;
  margin-left: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 12px;
}

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

.footer-brand p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.8;
  max-width: 340px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 18px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-2);
  transition: var(--transition);
}

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

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-contact-list li {
  font-size: 14px;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-contact-list li i {
  width: 16px;
  color: var(--text-3);
  font-size: 14px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: var(--text-3);
}

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

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

/* ============ 响应式 ============ */
@media screen and (max-width: 1024px) {
  .side-nav {
    display: none;
  }

  .mobile-topbar {
    display: flex;
  }

  .main-wrapper {
    margin-left: 0;
  }

  body {
    padding-top: 64px;
  }

  .mobile-drawer {
    display: block;
  }

  .hero {
    min-height: 480px;
    height: auto;
    padding: 80px 0;
  }

  .hero-content {
    padding: 0 24px;
  }

  .hero h1 {
    font-size: 34px;
  }

  .section-pad {
    padding: 64px 0;
  }

  .container {
    padding: 0 24px;
  }

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

  .service-card:nth-child(3) {
    transform: none;
  }

  .service-card:nth-child(4) {
    grid-column: auto;
    transform: none;
    justify-self: stretch;
    max-width: none;
    width: auto;
  }

  .service-card:hover,
  .service-card:nth-child(3):hover,
  .service-card:nth-child(4):hover {
    transform: translateY(-4px);
  }

  .data-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    padding: 40px 24px;
  }

  .data-item + .data-item::before {
    display: none;
  }

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

  .case-card:last-child {
    transform: none;
  }

  .sol-row,
  .sol-row.reverse {
    flex-direction: column;
    gap: 28px;
  }

  .sol-img,
  .sol-text {
    width: 100%;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .faq-intro {
    position: static;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-section-main {
    padding: 40px 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media screen and (max-width: 640px) {
  .hero h1 {
    font-size: 28px;
  }

  .hero-sub {
    font-size: 15px;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta .btn-primary,
  .hero-cta .btn-outline {
    width: 100%;
  }

  .hero-stats {
    gap: 20px;
  }

  .section-title {
    font-size: 24px;
  }

  .service-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .service-card:nth-child(3),
  .service-card:nth-child(4) {
    transform: none !important;
  }

  .data-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .news-row {
    flex-wrap: wrap;
    gap: 12px;
  }

  .news-date {
    width: 52px;
    height: 52px;
  }

  .news-date .day {
    font-size: 18px;
  }

  .news-cat {
    display: none;
  }

  .form-row-2 {
    grid-template-columns: 1fr;
  }

  .contact-section-main {
    padding: 32px 20px;
  }

  .contact-form-card {
    padding: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* roulang page: category1 */
:root {
  --bg-base: #F6FAFC;
  --bg-section: #EDF3F8;
  --bg-card: #FFFFFF;
  --primary: #3478A0;
  --primary-deep: #28618A;
  --accent: #C83E3E;
  --text-1: #1C2B36;
  --text-2: #516A78;
  --text-3: #8CA3AF;
  --line: #DFE8EF;
  --line-light: #EAF1F6;
  --shadow: 0 4px 20px rgba(52, 120, 160, 0.08);
  --shadow-hover: 0 10px 30px rgba(52, 120, 160, 0.14);
  --radius-card: 14px;
  --radius-btn: 8px;
  --radius-input: 8px;
  --transition: all 0.25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "SF Pro SC", sans-serif;
  background: var(--bg-base);
  color: var(--text-1);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-deep); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; font-family: inherit; }
input, textarea { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }

/* ===== 左侧导航（桌面端） ===== */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 240px;
  height: 100vh;
  background: #fff;
  border-right: 1px solid var(--line-light);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 32px 20px 24px;
  z-index: 100;
  overflow-y: auto;
}
.sidebar-brand { text-align: center; padding-bottom: 28px; border-bottom: 1px solid var(--line-light); }
.brand-logo { width: 60px; height: 60px; margin: 0 auto 14px; display: flex; align-items: center; justify-content: center; background: #EAF2F8; border-radius: 16px; border: 1px solid var(--line); }
.brand-logo svg { width: 40px; height: 40px; }
.brand-name { font-size: 19px; font-weight: 700; color: var(--text-1); letter-spacing: 0.5px; }
.brand-name span { color: var(--primary); }
.brand-tagline { font-size: 12px; color: var(--text-3); margin-top: 6px; letter-spacing: 0.1em; }
.nav-list { margin-top: 28px; display: flex; flex-direction: column; gap: 6px; }
.nav-item {
  display: flex; align-items: center;
  gap: 12px;
  height: 48px;
  padding: 0 16px;
  border-radius: 10px;
  font-size: 15px;
  color: var(--text-2);
  position: relative;
  transition: var(--transition);
}
.nav-item i { font-size: 18px; color: var(--text-3); transition: var(--transition); width: 20px; text-align: center; }
.nav-item:hover { background: var(--bg-section); color: var(--text-1); }
.nav-item:hover i { color: var(--primary); }
.nav-item.active { background: #EAF2F8; color: var(--primary-deep); font-weight: 600; }
.nav-item.active i { color: var(--primary); }
.nav-item.active::before { content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 3px; height: 22px; border-radius: 3px; background: var(--primary); }
.nav-item:focus-visible, .btn:focus-visible, .hamburger:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid rgba(52, 120, 160, 0.35); outline-offset: 2px; }
.sidebar-contact { padding-top: 24px; border-top: 1px solid var(--line-light); font-size: 13px; color: var(--text-2); }
.sidebar-contact p { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.sidebar-contact p i { width: 16px; color: var(--primary); font-size: 14px; text-align: center; }
.btn-outline {
  display: inline-flex; align-items: center; justify-content: center;
  height: 40px; padding: 0 20px;
  border: 1.5px solid var(--primary); color: var(--primary);
  border-radius: var(--radius-btn); font-size: 14px; font-weight: 500;
  background: transparent; transition: var(--transition);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-outline:active { transform: scale(0.98); }

/* ===== 移动端顶栏 ===== */
.topbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: 60px;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-light);
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 200;
}
.topbar-brand { font-size: 17px; font-weight: 700; color: var(--text-1); }
.topbar-brand span { color: var(--primary); }
.hamburger {
  width: 44px; height: 44px;
  background: transparent; border: none;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 5px; border-radius: 10px;
}
.hamburger:hover { background: var(--bg-section); }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-1); border-radius: 2px; transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-drawer {
  position: fixed; top: 60px; left: 0; right: 0; bottom: 0;
  background: #fff;
  z-index: 150;
  padding: 24px 20px 40px;
  overflow-y: auto;
  display: none;
  box-shadow: var(--shadow);
}
.mobile-drawer.open { display: block; }
.mobile-drawer .nav-list { gap: 4px; }
.mobile-drawer .nav-item { height: 50px; font-size: 16px; }
.drawer-contact { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--line-light); font-size: 14px; color: var(--text-2); }
.drawer-contact p { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.drawer-contact p i { width: 18px; color: var(--primary); text-align: center; }

/* ===== 主内容布局 ===== */
.main-wrapper { margin-left: 240px; min-height: 100vh; display: flex; flex-direction: column; }
.main-wrapper > .category-hero { flex-shrink: 0; }

/* ===== 分类页Hero ===== */
.category-hero {
  position: relative;
  height: 280px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.category-hero::before {
  content: ""; position: absolute; inset: 0;
  background: rgba(28, 43, 54, 0.4);
}
.category-hero .container { position: relative; z-index: 2; }
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.18);
  color: #fff;
  font-size: 12px;
  letter-spacing: 0.2em;
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.3);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.category-hero h1 { color: #fff; font-size: 32px; font-weight: 700; line-height: 1.3; margin-bottom: 10px; }
.category-hero h1 .accent-text { color: #BFE3F2; }
.category-hero .hero-sub { color: rgba(255,255,255,0.85); font-size: 16px; line-height: 1.6; max-width: 560px; }

/* ===== 通用Section ===== */
.section { padding: 80px 0; }
.section.bg-section { background: var(--bg-section); }
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-3);
  text-transform: uppercase;
  margin-bottom: 10px;
  font-family: Arial, "Helvetica Neue", Inter, sans-serif;
}
.section-head h2 { font-size: 32px; font-weight: 600; color: var(--text-1); line-height: 1.4; margin-bottom: 12px; }
.section-head .section-sub { font-size: 14px; color: var(--text-2); }

/* ===== 服务卡片（错峰布局） ===== */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px 28px; }
.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 28px 26px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line-light);
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.service-card .card-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: #EAF2F8;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  transition: var(--transition);
}
.service-card .card-icon i { font-size: 28px; color: var(--primary); transition: var(--transition); }
.service-card:hover .card-icon { background: rgba(200, 62, 62, 0.08); }
.service-card:hover .card-icon i { color: var(--accent); }
.service-card h3 { font-size: 18px; font-weight: 600; color: var(--text-1); margin-bottom: 10px; }
.service-card p { font-size: 14px; color: var(--text-2); line-height: 1.7; flex: 1; }
.service-card .card-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; color: var(--primary); font-weight: 500;
  margin-top: 16px; padding-top: 14px;
  border-top: 1px solid var(--line-light);
}
.service-card .card-link i { font-size: 13px; transition: transform 0.3s ease; }
.service-card .card-link:hover { color: var(--accent); }
.service-card .card-link:hover i { transform: translateX(4px); }
.service-card .card-badge {
  position: absolute; top: 14px; right: 14px;
  background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 500;
  padding: 3px 12px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}
.card-offset-down { transform: translateY(28px); }
.card-offset-down:hover { transform: translateY(24px); }
.card-offset-up { transform: translateY(-28px); }
.card-offset-up:hover { transform: translateY(-32px); }
@media (max-width: 1024px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 24px; }
  .card-offset-down, .card-offset-up { transform: none; }
  .card-offset-down:hover, .card-offset-up:hover { transform: translateY(-4px); }
}

/* ===== 内容说明文字块 ===== */
.about-service .grid-x { align-items: center; }
.about-service .about-img {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: relative;
}
.about-service .about-img img { width: 100%; height: 340px; object-fit: cover; transition: transform 0.4s ease; }
.about-service .about-img:hover img { transform: scale(1.03); }
.about-service .about-text .section-tag { margin-bottom: 8px; }
.about-service .about-text h2 { font-size: 28px; font-weight: 600; color: var(--text-1); line-height: 1.4; margin-bottom: 18px; }
.about-service .about-text p { font-size: 15px; color: var(--text-2); line-height: 1.8; margin-bottom: 22px; }
.check-list li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14px; color: var(--text-2);
  margin-bottom: 12px;
}
.check-list li i { color: var(--primary); font-size: 14px; margin-top: 4px; }

/* ===== 服务流程 ===== */
.process-section { background: var(--bg-base); }
.process-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.process-step { text-align: center; position: relative; }
.process-step .step-num {
  width: 56px; height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: #EAF2F8;
  border: 2px solid var(--primary);
  color: var(--primary);
  font-size: 20px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  z-index: 2;
  transition: var(--transition);
}
.process-step:hover .step-num { background: var(--primary); color: #fff; }
.process-step .step-title { font-size: 16px; font-weight: 600; color: var(--text-1); margin-bottom: 8px; }
.process-step .step-desc { font-size: 13px; color: var(--text-3); line-height: 1.6; padding: 0 8px; }
.process-step::before {
  content: ""; position: absolute; top: 28px; left: -12%; width: 24%; height: 2px;
  background: var(--line); z-index: 1;
}
.process-step:first-child::before { display: none; }
@media (max-width: 1024px) {
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
  .process-step::before { display: none; }
  .main-wrapper { margin-left: 0; }
  .sidebar { display: none; }
  .topbar { display: flex; }
  .main-wrapper .category-hero { padding-top: 60px; }
  .category-hero { height: 240px; }
  .section { padding: 56px 0; }
  .container { padding: 0 24px; }
  .section-head h2 { font-size: 26px; }
  .product-grid { grid-template-columns: 1fr; }
  .card-offset-down, .card-offset-up { transform: none; }
}

/* ===== FAQ ===== */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-wrap .accordion { background: transparent; }
.faq-wrap .accordion-item {
  background: var(--bg-card);
  border-radius: 12px;
  margin-bottom: 16px;
  border: 1px solid var(--line-light);
  box-shadow: 0 2px 10px rgba(52, 120, 160, 0.05);
  overflow: hidden;
  transition: var(--transition);
}
.faq-wrap .accordion-item:hover { box-shadow: var(--shadow); }
.faq-wrap .accordion-title {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  font-size: 16px; font-weight: 600;
  color: var(--text-1);
  background: transparent;
  border: none;
  position: relative;
}
.faq-wrap .accordion-title:hover, .faq-wrap .accordion-title:focus { background: transparent; color: var(--primary); }
.faq-wrap .accordion-title::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 13px;
  color: var(--text-3);
  width: 30px; height: 30px;
  border: 1.5px solid var(--line);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: all 0.3s ease;
}
.faq-wrap .accordion-item.is-active .accordion-title::after { transform: rotate(180deg); border-color: var(--primary); color: var(--primary); }
.faq-wrap .accordion-content { padding: 0 24px 20px; font-size: 15px; color: var(--text-2); line-height: 1.7; }

/* ===== CTA + 表单 ===== */
.cta-section { background: linear-gradient(135deg, var(--primary-deep), var(--primary)); padding: 72px 0; }
.cta-card {
  border-radius: var(--radius-card);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(6px);
  padding: 44px 48px;
  box-shadow: 0 16px 40px rgba(28, 43, 54, 0.18);
}
.cta-info h2 { color: #fff; font-size: 26px; font-weight: 700; margin-bottom: 14px; }
.cta-info > p { color: rgba(255,255,255,0.8); font-size: 15px; line-height: 1.7; margin-bottom: 28px; }
.cta-contact-list li { display: flex; align-items: center; gap: 12px; color: rgba(255,255,255,0.85); font-size: 14px; margin-bottom: 14px; }
.cta-contact-list li i { width: 18px; color: #fff; font-size: 15px; text-align: center; }
.qr-placeholder {
  width: 120px; height: 120px;
  border: 2px dashed rgba(255,255,255,0.5);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  text-align: center;
  margin-top: 24px;
  background: rgba(255,255,255,0.08);
}
.cta-form-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow);
}
.cta-form-card h3 { font-size: 20px; font-weight: 600; color: var(--text-1); margin-bottom: 22px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; color: var(--text-2); margin-bottom: 8px; font-weight: 500; }
.form-group label .required { color: var(--accent); margin-left: 2px; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-input);
  font-size: 14px;
  color: var(--text-1);
  background: #FBFCFE;
  transition: var(--transition);
  box-shadow: none;
  margin-bottom: 0;
  outline: none;
}
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(52, 120, 160, 0.15);
  background: #fff;
}
.form-group textarea { resize: vertical; min-height: 110px; line-height: 1.6; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.btn-submit {
  width: 100%; height: 48px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin-top: 10px;
}
.btn-submit:hover { background: #A93232; transform: translateY(-2px); }
.btn-submit:active { transform: scale(0.98); }
.btn-submit .spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: none;
}
.btn-submit.loading .spinner { display: inline-block; }
.btn-submit.loading .btn-text { opacity: 0.8; }
.btn-submit.success { background: #2E8B57; }
.btn-submit.success .spinner { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 1024px) {
  .cta-card { grid-template-columns: 1fr; padding: 32px 24px; gap: 32px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .qr-placeholder { width: 100px; height: 100px; }
}

/* ===== 页脚 ===== */
.footer { background: var(--bg-section); border-top: 1px solid var(--line); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding: 56px 0 40px;
}
.footer-brand-text { font-size: 22px; font-weight: 700; color: var(--text-1); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-brand-text span { color: var(--primary); }
.footer-brand p { font-size: 14px; color: var(--text-2); line-height: 1.7; max-width: 340px; }
.footer-title { font-size: 15px; font-weight: 600; color: var(--text-1); margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: var(--text-2); }
.footer-links a:hover { color: var(--primary); }
.footer-contact-list li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-2); margin-bottom: 12px; }
.footer-contact-list li i { width: 18px; color: var(--primary); text-align: center; }
.footer-bottom {
  border-top: 1px solid var(--line-light);
  padding: 18px 0;
  text-align: center;
  font-size: 12px;
  color: var(--text-3);
}
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding: 40px 0 28px; }
  .category-hero h1 { font-size: 26px; }
  .category-hero .hero-sub { font-size: 14px; }
  .section { padding: 48px 0; }
  .section-head { margin-bottom: 40px; }
  .section-head h2 { font-size: 24px; }
  .service-card { padding: 24px 20px 20px; }
  .cta-section { padding: 48px 0; }
  .cta-form-card { padding: 22px; }
  .faq-wrap .accordion-title { padding: 16px 18px; font-size: 15px; }
  .faq-wrap .accordion-content { padding: 0 18px 16px; font-size: 14px; }
  .about-service .about-img img { height: 240px; }
  .process-grid { grid-template-columns: 1fr; }
  .container { padding: 0 20px; }
}

/* roulang page: article */
:root{
  --bg-base:#F6FAFC; --bg-section:#EDF3F8; --bg-card:#FFFFFF;
  --primary:#3478A0; --primary-deep:#28618A; --accent:#C83E3E;
  --text-1:#1C2B36; --text-2:#516A78; --text-3:#8CA3AF;
  --line:#DFE8EF; --line-light:#EAF1F6;
  --shadow:0 4px 20px rgba(52,120,160,.08);
  --shadow-hover:0 10px 30px rgba(52,120,160,.14);
  --radius-card:14px; --radius-btn:8px; --radius-input:8px;
  --transition:all .25s ease; --sbw:240px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","SF Pro SC",sans-serif;
  background:var(--bg-base);color:var(--text-1);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:var(--primary);transition:var(--transition)}
a:hover{color:var(--primary-deep)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{border:none;background:none;cursor:pointer;font-family:inherit;font-size:inherit}
input,textarea{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 40px}
h1,h2,h3,h4,h5{line-height:1.4;font-weight:600}

/* ===== 左侧导航（桌面） ===== */
.sidebar{
  position:fixed;left:0;top:0;width:var(--sbw);height:100vh;
  background:var(--bg-card);border-right:1px solid var(--line-light);
  display:flex;flex-direction:column;padding:32px 20px 24px;z-index:1000;
  transition:var(--transition);overflow-y:auto;
}
.sidebar-brand{text-align:center;padding-bottom:28px;border-bottom:1px solid var(--line-light)}
.logo-circle{
  width:72px;height:72px;border-radius:50%;margin:0 auto 14px;
  background:linear-gradient(135deg,#EAF2F8,#D6E6F0);
  display:flex;align-items:center;justify-content:center;
  border:2px solid var(--line);box-shadow:var(--shadow);
}
.logo-circle i{font-size:30px;color:var(--primary)}
.sidebar-brand-name{
  font-size:20px;font-weight:700;color:var(--text-1);letter-spacing:.02em;
}
.sidebar-brand-name span{color:var(--primary)}
.sidebar-brand-sub{font-size:12px;color:var(--text-3);margin-top:4px;letter-spacing:.12em}
.nav-list{margin-top:24px;display:flex;flex-direction:column;gap:6px}
.nav-item{
  display:flex;align-items:center;gap:12px;height:46px;padding:0 14px;
  border-radius:10px;font-size:15px;color:var(--text-2);font-weight:500;
  transition:var(--transition);position:relative;
}
.nav-item i{width:18px;text-align:center;font-size:16px;color:var(--text-3);transition:var(--transition)}
.nav-item:hover{background:var(--bg-section);color:var(--text-1)}
.nav-item:hover i{color:var(--primary)}
.nav-item.active{
  background:#EAF2F8;color:var(--primary-deep);font-weight:600;
  box-shadow:inset 3px 0 0 var(--primary);
}
.nav-item.active i{color:var(--primary)}
.sidebar-contact{
  margin-top:auto;padding-top:24px;border-top:1px solid var(--line-light);
}
.sidebar-contact p{font-size:13px;color:var(--text-2);display:flex;align-items:center;gap:8px;margin-bottom:8px}
.sidebar-contact p i{color:var(--primary);width:16px;text-align:center;font-size:14px}
.sidebar-cta{
  display:block;text-align:center;margin-top:14px;padding:10px 0;
  border:1.5px solid var(--primary);border-radius:var(--radius-btn);
  color:var(--primary);font-size:14px;font-weight:600;transition:var(--transition);
}
.sidebar-cta:hover{background:var(--primary);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow)}

/* ===== 移动端顶栏 ===== */
.mobile-header{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;
  background:var(--bg-card);border-bottom:1px solid var(--line-light);
  z-index:1100;align-items:center;justify-content:space-between;padding:0 20px;
}
.mobile-brand{font-size:18px;font-weight:700;color:var(--text-1)}
.mobile-brand span{color:var(--primary)}
.hamburger{
  width:40px;height:40px;border-radius:8px;color:var(--text-2);
  font-size:20px;display:flex;align-items:center;justify-content:center;
  transition:var(--transition);
}
.hamburger:hover{background:var(--bg-section);color:var(--primary)}

/* ===== 移动端抽屉 ===== */
.mobile-drawer{
  display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:1200;
  background:var(--bg-card);transform:translateX(-100%);transition:transform .3s ease;
  flex-direction:column;padding:24px;
}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer-header{
  display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;
  border-bottom:1px solid var(--line-light);margin-bottom:20px;
}
.mobile-drawer-header span{font-size:20px;font-weight:700;color:var(--text-1)}
.drawer-close{width:36px;height:36px;border-radius:8px;font-size:18px;color:var(--text-2);transition:var(--transition)}
.drawer-close:hover{background:var(--bg-section);color:var(--accent)}
.mobile-nav-list{display:flex;flex-direction:column;gap:8px}
.mobile-nav-list .nav-item{
  font-size:16px;height:50px;color:var(--text-2);font-weight:500;
  display:flex;align-items:center;gap:12px;padding:0 14px;border-radius:10px;
}
.mobile-nav-list .nav-item i{width:20px;text-align:center;font-size:17px;color:var(--text-3)}
.mobile-nav-list .nav-item:hover{background:var(--bg-section);color:var(--text-1)}
.mobile-nav-list .nav-item.active{
  background:#EAF2F8;color:var(--primary-deep);font-weight:600;
  box-shadow:inset 3px 0 0 var(--primary);
}
.mobile-drawer-contact{
  margin-top:auto;padding-top:24px;border-top:1px solid var(--line-light);
  text-align:center;
}
.mobile-drawer-contact p{font-size:14px;color:var(--text-2);margin-bottom:6px}

/* ===== 主内容区 ===== */
.main-wrapper{margin-left:var(--sbw);min-height:100vh;display:flex;flex-direction:column}
.article-main{flex:1;padding:48px 0 80px}
.article-container{max-width:1100px}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);
  margin-bottom:36px;flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-3);transition:var(--transition)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb i{font-size:12px;color:var(--line)}
.breadcrumb-current{color:var(--text-1);max-width:280px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ===== 文章头部 ===== */
.article-header{text-align:center;padding:0 20px 40px}
.article-header h1{
  font-size:34px;font-weight:700;color:var(--text-1);line-height:1.35;
  max-width:860px;margin:0 auto 20px;letter-spacing:.01em;
}
.article-meta{
  display:flex;align-items:center;justify-content:center;gap:28px;
  font-size:13px;color:var(--text-3);margin-bottom:28px;flex-wrap:wrap;
}
.meta-item{display:flex;align-items:center;gap:6px}
.meta-item i{color:var(--primary);font-size:14px}
.article-summary{
  max-width:760px;margin:0 auto;background:var(--bg-section);
  border-radius:10px;padding:16px 24px;font-size:14px;color:var(--text-2);
  line-height:1.8;text-align:left;border-left:3px solid var(--primary);
}

/* ===== 正文 ===== */
.article-content{
  max-width:760px;margin:0 auto;padding:40px 20px 0;
  font-size:16px;line-height:1.8;color:var(--text-1);
}
.article-content p{margin:0 0 24px}
.article-content h2{font-size:25px;font-weight:600;margin:42px 0 16px;padding-top:8px}
.article-content h3{font-size:20px;font-weight:600;margin:34px 0 12px}
.article-content h4{font-size:17px;font-weight:600;margin:28px 0 10px}
.article-content img{
  max-width:100%;border-radius:8px;margin:20px 0;box-shadow:var(--shadow);
}
.article-content a{color:var(--primary);border-bottom:1px solid rgba(52,120,160,.3)}
.article-content a:hover{color:var(--primary-deep);border-bottom-color:var(--primary)}
.article-content blockquote{
  border-left:3px solid var(--primary);background:var(--bg-section);
  padding:16px 24px;margin:24px 0;border-radius:0 8px 8px 0;
  color:var(--text-2);font-size:15px;
}
.article-content ul,.article-content ol{margin:16px 0 24px;padding-left:24px}
.article-content li{margin-bottom:8px;line-height:1.7}
.article-content ul li{list-style:disc}
.article-content ol li{list-style:decimal}
.article-content ul li::marker{color:var(--primary)}
.article-content ol li::marker{color:var(--primary)}
.article-content table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.article-content table th,.article-content table td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-content table th{background:var(--bg-section);font-weight:600;color:var(--text-1)}
.article-content table tr:hover{background:var(--bg-class)}

/* ===== 分享标签 ===== */
.article-share{
  max-width:760px;margin:0 auto;padding:40px 20px 0;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;
  border-bottom:1px solid var(--line-light);
}
.article-share-tags{display:flex;gap:8px;flex-wrap:wrap}
.article-share-tags .tag{
  background:var(--bg-section);color:var(--primary);font-size:12px;
  padding:4px 12px;border-radius:4px;font-weight:500;
}
.article-share-tags .tag:hover{background:#EAF2F8;color:var(--primary-deep)}
.share-box{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.share-box a{
  width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;
  background:var(--bg-section);color:var(--text-2);font-size:15px;transition:var(--transition);
}
.share-box a:hover{background:var(--primary);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}

/* ===== 相关推荐 ===== */
.related-posts{
  max-width:1080px;margin:48px auto 0;padding:48px 20px 0;
  border-top:1px solid var(--line-light);
}
.related-header{
  display:flex;align-items:baseline;justify-content:space-between;
  margin-bottom:24px;flex-wrap:wrap;gap:8px;
}
.related-title{font-size:24px;font-weight:700;color:var(--text-1)}
.related-view-all{font-size:13px;color:var(--text-3)}
.related-view-all i{font-size:11px}
.related-view-all:hover{color:var(--primary)}
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.related-card{
  display:flex;background:var(--bg-card);border-radius:var(--radius-card);
  overflow:hidden;border:1px solid var(--line-light);box-shadow:var(--shadow);
  transition:var(--transition);
}
.related-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.related-thumb{width:150px;min-height:110px;overflow:hidden;flex-shrink:0}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.related-card:hover .related-thumb img{transform:scale(1.05)}
.related-info{padding:16px 18px;display:flex;flex-direction:column;justify-content:center}
.related-info h4{font-size:15px;font-weight:600;color:var(--text-1);line-height:1.5;margin-bottom:8px}
.related-info h4:hover{color:var(--primary)}
.related-date{font-size:12px;color:var(--text-3)}
.related-empty{
  grid-column:1/-1;background:var(--bg-section);border-radius:var(--radius-card);
  padding:36px;text-align:center;color:var(--text-3);font-size:14px;
}

/* ===== 上一篇/下一篇 ===== */
.article-pagination{
  max-width:1080px;margin:0 auto;padding:40px 20px 0;
  display:flex;align-items:center;gap:16px;
}
.prev-post,.next-post{
  flex:1;background:var(--bg-card);border:1px solid var(--line-light);
  border-radius:var(--radius-card);padding:14px 18px;transition:var(--transition);
  display:flex;flex-direction:column;gap:4px;
}
.prev-post:hover,.next-post:hover{
  border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-1px);
}
.prev-post span,.next-post span{font-size:12px;color:var(--text-3)}
.prev-post strong,.next-post strong{
  font-size:14px;font-weight:600;color:var(--text-1);white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;max-width:100%;
}
.prev-post:hover strong,.next-post:hover strong{color:var(--primary)}
.pagination-list{
  flex-shrink:0;background:var(--bg-section);border-radius:var(--radius-btn);
  padding:10px 18px;font-size:14px;color:var(--text-2);font-weight:500;
  transition:var(--transition);
}
.pagination-list:hover{background:var(--primary);color:#fff;box-shadow:var(--shadow)}

/* ===== 内容未找到 ===== */
.not-found{
  max-width:600px;margin:40px auto;text-align:center;
  background:var(--bg-card);border-radius:var(--radius-card);
  padding:60px 40px;box-shadow:var(--shadow);border:1px solid var(--line-light);
}
.not-found-icon{
  width:72px;height:72px;border-radius:50%;margin:0 auto 20px;
  background:var(--bg-section);display:flex;align-items:center;justify-content:center;
}
.not-found-icon i{font-size:32px;color:var(--accent)}
.not-found h2{font-size:26px;font-weight:700;color:var(--text-1);margin-bottom:12px}
.not-found p{font-size:15px;color:var(--text-2);margin-bottom:28px;line-height:1.7}
.btn-primary{
  display:inline-block;background:var(--primary);color:#fff;
  padding:12px 32px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  transition:var(--transition);
}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-primary:active{transform:scale(.98)}

/* ===== 页脚 ===== */
.footer{
  background:var(--bg-section);border-top:1px solid var(--line);
  margin-top:auto;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1.2fr;gap:40px;
  padding:56px 0 40px;
}
.footer-brand-text{font-size:22px;font-weight:700;color:var(--text-1);margin-bottom:14px}
.footer-brand-text span{color:var(--primary)}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;max-width:360px}
.footer-title{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:18px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-2);transition:var(--transition)}
.footer-links a:hover{color:var(--primary);padding-left:4px}
.footer-contact-list li{
  display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-2);
  margin-bottom:12px;
}
.footer-contact-list li i{color:var(--primary);width:16px;text-align:center;font-size:15px}
.footer-bottom{
  border-top:1px solid var(--line);padding:18px 0;font-size:12px;color:var(--text-3);
  text-align:center;
}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .main-wrapper{margin-left:0}
  .sidebar{display:none}
  .mobile-header{display:flex}
  .mobile-drawer{display:flex;visibility:hidden}
  .mobile-drawer.open{visibility:visible}
  .container{padding:0 24px}
  .article-main{padding:80px 0 60px}
  .article-header h1{font-size:28px}
  .related-grid{grid-template-columns:1fr}
  .article-pagination{flex-direction:column}
  .prev-post,.next-post{width:100%}
  .pagination-list{margin:4px 0}
}
@media (min-width:1025px){
  .main-wrapper{margin-left:var(--sbw)}
  .mobile-header{display:none}
  .mobile-drawer{display:none;visibility:visible}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:40px 0 28px}
  .article-header h1{font-size:24px}
  .article-meta{gap:14px}
  .related-thumb{width:110px;min-height:90px}
  .related-info h4{font-size:14px}
  .related-grid{grid-template-columns:1fr;gap:14px}
  .article-share{flex-direction:column;align-items:flex-start}
  .breadcrumb{font-size:12px}
}

/* ===== 焦点/激活状态 ===== */
.nav-item:focus-visible,.btn-primary:focus-visible,.pagination-list:focus-visible,
.related-card:focus-visible,.sidebar-cta:focus-visible{
  outline:3px solid rgba(52,120,160,.35);outline-offset:2px;
}
.nav-item:active,.btn-primary:active,.pagination-list:active,.sidebar-cta:active{
  transform:scale(.98);
}

/* roulang page: category2 */
:root {
  --bg-base: #F6FAFC;
  --bg-section: #EDF3F8;
  --bg-card: #FFFFFF;
  --primary: #3478A0;
  --primary-deep: #28618A;
  --accent: #C83E3E;
  --text-1: #1C2B36;
  --text-2: #516A78;
  --text-3: #8CA3AF;
  --line: #DFE8EF;
  --line-light: #EAF1F6;
  --shadow: 0 4px 20px rgba(52, 120, 160, 0.08);
  --shadow-hover: 0 10px 30px rgba(52, 120, 160, 0.14);
  --radius-card: 14px;
  --radius-btn: 8px;
  --radius-input: 8px;
  --transition: all 0.25s ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "SF Pro SC", sans-serif;
  background: var(--bg-base);
  color: var(--text-1);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; border-radius: 6px; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-deep); }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 16px; }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 600; line-height: 1.4; color: var(--text-1); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 42px;
}

/* ===== 左侧固定导航 ===== */
.side-nav {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: 240px;
  background: var(--bg-card);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line-light);
  padding: 32px 20px 24px;
  overflow-y: auto;
}
.brand-area {
  padding: 8px 8px 28px;
  border-bottom: 1px solid var(--line-light);
}
.logo-circle {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #EAF2F8, #D5E7F2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  border: 2px solid #D0E2EE;
  color: var(--primary);
}
.logo-circle i { font-size: 24px; }
.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: 0.5px;
  line-height: 1.4;
}
.brand-sub {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 4px;
  letter-spacing: 0.2em;
}
.nav-list { padding: 24px 0; flex: 1; }
.nav-item {
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: 4px;
  position: relative;
  transition: var(--transition);
}
.nav-item i {
  width: 20px;
  margin-right: 10px;
  font-size: 18px;
  color: var(--text-3);
  text-align: center;
  transition: var(--transition);
}
.nav-item:hover {
  background: var(--bg-section);
  color: var(--text-1);
}
.nav-item.active {
  background: #EAF2F8;
  color: var(--primary-deep);
  font-weight: 600;
}
.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 24px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}
.nav-item.active i { color: var(--primary); }
.nav-contact {
  background: var(--bg-section);
  border-radius: var(--radius-card);
  padding: 16px 16px 14px;
  margin-top: 16px;
}
.nav-contact-item {
  display: flex;
  align-items: center;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 8px;
}
.nav-contact-item i {
  width: 18px;
  color: var(--primary);
  font-size: 14px;
  margin-right: 8px;
  text-align: center;
}
.btn-ghost-sm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 36px;
  border-radius: var(--radius-btn);
  border: 1.5px solid var(--primary);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  background: transparent;
  margin-top: 10px;
  transition: var(--transition);
}
.btn-ghost-sm:hover {
  background: var(--primary);
  color: #fff;
}

/* ===== 移动端顶部导航 ===== */
.mobile-nav {
  display: none;
}
.mobile-nav-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1001;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 60px;
}
.mobile-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
}
.mobile-toggle {
  width: 42px; height: 42px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text-1);
  background: var(--bg-section);
  transition: var(--transition);
}
.mobile-toggle:hover { background: var(--line-light); }
.mobile-menu {
  display: none;
  position: fixed;
  top: 60px; left: 0; right: 0; bottom: 0;
  background: var(--bg-card);
  z-index: 1000;
  padding: 20px;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}
.mobile-menu.open { display: block; }
.mobile-nav-item {
  display: flex;
  align-items: center;
  height: 52px;
  padding: 0 14px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-2);
  border-bottom: 1px solid var(--line-light);
  transition: var(--transition);
}
.mobile-nav-item i { width: 22px; font-size: 18px; margin-right: 12px; color: var(--text-3); }
.mobile-nav-item:last-of-type { border-bottom: none; }
.mobile-nav-item:hover { background: var(--bg-section); color: var(--text-1); }
.mobile-nav-item.active { background: #EAF2F8; color: var(--primary-deep); font-weight: 600; }
.mobile-nav-item.active i { color: var(--primary); }
.mobile-nav-contact {
  margin-top: 24px;
  background: var(--bg-section);
  border-radius: var(--radius-card);
  padding: 20px;
}
.mobile-nav-contact .nav-contact-item { font-size: 14px; }
.mobile-nav-contact .btn-ghost-sm { margin-top: 14px; }

/* ===== 主内容区 ===== */
.main-wrapper {
  margin-left: 240px;
}

/* ===== 小Hero ===== */
.page-hero {
  position: relative;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  background: linear-gradient(90deg, rgba(28, 43, 54, 0.72), rgba(28, 43, 54, 0.42)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding: 80px 0;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  max-width: 620px;
}
.page-hero h1 span { color: #BFE3F2; }
.page-hero p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.78);
  max-width: 540px;
  margin-top: 12px;
  line-height: 1.7;
}
.page-hero-wave {
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  width: 100%;
  height: 40px;
}

/* ===== 区块通用 ===== */
.section-block {
  padding: 90px 0;
}
.section-block.alt { background: var(--bg-section); }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--text-3);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.4;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 15px;
  color: var(--text-2);
  max-width: 640px;
  line-height: 1.7;
  margin-bottom: 48px;
}

/* ===== 优势交替列表 ===== */
.advantage-row {
  margin-bottom: 70px;
  align-items: center;
}
.advantage-row:last-child { margin-bottom: 0; }
.advantage-image {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: relative;
}
.advantage-image img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  border-radius: var(--radius-card);
  transition: transform 0.4s ease;
}
.advantage-image:hover img { transform: scale(1.03); }
.advantage-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(28,43,54,0.12), transparent 40%);
  pointer-events: none;
}
.advantage-content { padding: 0 16px; }
.advantage-content .section-tag { color: var(--primary); font-size: 12px; }
.advantage-content h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 16px;
  line-height: 1.4;
}
.advantage-content p {
  font-size: 15px;
  color: var(--text-2);
  margin-bottom: 20px;
  line-height: 1.8;
}
.adv-points li {
  display: flex;
  align-items: flex-start;
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 10px;
  line-height: 1.6;
}
.adv-points i {
  color: var(--primary);
  margin-right: 10px;
  margin-top: 3px;
  font-size: 14px;
  flex-shrink: 0;
}

/* ===== 数据条 ===== */
.stats-band {
  background: var(--bg-section);
  padding: 72px 0;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 24px 12px;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  width: 1px; height: 56px;
  background: var(--line-light);
}
.stat-number {
  font-size: 40px;
  font-weight: 700;
  color: var(--primary);
  font-family: Arial, "Helvetica Neue", Inter, sans-serif;
  line-height: 1.2;
}
.stat-line {
  width: 24px; height: 2px;
  background: var(--accent);
  margin: 10px auto 12px;
  border-radius: 2px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-2);
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #28618A, #3478A0);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  top: -100px; right: -60px;
}
.cta-section::after {
  content: "";
  position: absolute;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: rgba(255,255,255,0.03);
  bottom: -60px; left: 40px;
}
.cta-inner { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-left { flex: 1 1 50%; }
.cta-left h2 {
  font-size: 28px;
  color: #fff;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}
.cta-left p {
  font-size: 15px;
  color: rgba(255,255,255,0.82);
  margin-bottom: 0;
  line-height: 1.7;
}
.cta-right {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 32px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  border: 1.5px solid transparent;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(200, 62, 62, 0.3);
}
.btn-accent:hover {
  background: #A93232;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(200,62,62,0.4);
}
.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border-color: #fff;
}
.btn:active { transform: scale(0.98); }

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-section);
  border-top: 1px solid var(--line);
  padding-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 12px;
}
.footer-brand-text span { color: var(--primary); }
.footer-brand p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.8;
  max-width: 320px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-title::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 28px; height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-2);
}
.footer-links a:hover { color: var(--primary); padding-left: 4px; }
.footer-contact-list li {
  display: flex;
  align-items: center;
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 12px;
}
.footer-contact-list i {
  width: 20px;
  color: var(--primary);
  margin-right: 10px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid var(--line-light);
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: var(--text-3);
}
.footer-bottom .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-up { animation: fadeInUp 0.6s ease forwards; }

/* ===== 断点 ===== */
@media screen and (max-width: 1024px) {
  .side-nav { display: none; }
  .main-wrapper { margin-left: 0; }
  .mobile-nav { display: block; }
  body { padding-top: 60px; }
  .page-hero { min-height: 220px; padding: 60px 0; }
  .page-hero h1 { font-size: 28px; }
  .container { padding: 0 24px; }
  .section-block { padding: 64px 0; }
  .section-title { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media screen and (max-width: 640px) {
  .container { padding: 0 20px; }
  .page-hero h1 { font-size: 24px; }
  .page-hero p { font-size: 14px; }
  .advantage-content { padding: 0; margin-top: 24px; }
  .advantage-image img { height: 220px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
  .stat-item:nth-child(2)::after { display: none; }
  .stat-number { font-size: 34px; }
  .cta-section { padding: 56px 0; }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-right { width: 100%; justify-content: center; }
  .btn { width: 100%; padding: 0 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand { grid-column: 1; }
  .footer-bottom .container { justify-content: center; text-align: center; }
}

/* roulang page: category3 */
:root {
  --bg-base: #F6FAFC;
  --bg-section: #EDF3F8;
  --bg-card: #FFFFFF;
  --primary: #3478A0;
  --primary-deep: #28618A;
  --accent: #C83E3E;
  --text-1: #1C2B36;
  --text-2: #516A78;
  --text-3: #8CA3AF;
  --line: #DFE8EF;
  --line-light: #EAF1F6;
  --shadow: 0 4px 20px rgba(52, 120, 160, 0.08);
  --shadow-hover: 0 10px 30px rgba(52, 120, 160, 0.14);
  --radius-card: 14px;
  --radius-btn: 8px;
  --radius-input: 8px;
  --transition: all 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "SF Pro SC", sans-serif;
  background: var(--bg-base);
  color: var(--text-1);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

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

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

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

button {
  cursor: pointer;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(52, 120, 160, 0.4);
  outline-offset: 2px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ========== 左侧竖向导航（桌面端） ========== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 240px;
  height: 100vh;
  background: #FFFFFF;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  z-index: 1000;
}

.brand {
  padding: 36px 24px 24px;
  border-bottom: 1px solid var(--line-light);
}

.brand-logo {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--bg-section);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.3;
  letter-spacing: 0.02em;
}

.brand-name span {
  color: var(--primary);
}

.brand-sub {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 4px;
}

.nav-wrap {
  flex: 1;
  padding: 24px 16px;
  overflow-y: auto;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 48px;
  padding: 0 16px;
  border-radius: 10px;
  color: var(--text-2);
  font-size: 15px;
  position: relative;
  transition: var(--transition);
}

.nav-item i {
  font-size: 18px;
  color: var(--text-3);
  width: 20px;
  text-align: center;
  transition: var(--transition);
}

.nav-item:hover {
  background: var(--bg-section);
  color: var(--text-1);
}

.nav-item:hover i {
  color: var(--primary);
}

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

.nav-item.active {
  background: #EAF2F8;
  color: var(--primary-deep);
  font-weight: 600;
}

.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--primary);
}

.nav-item.active i {
  color: var(--primary);
}

.sidebar-contact {
  padding: 20px 24px 28px;
  border-top: 1px solid var(--line-light);
}

.sidebar-contact-list {
  list-style: none;
  margin-bottom: 16px;
}

.sidebar-contact-list li {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.btn-mini {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 18px;
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-btn);
  color: var(--primary-deep);
  font-size: 13px;
  font-weight: 600;
  background: transparent;
  transition: var(--transition);
}

.btn-mini:hover {
  background: var(--primary);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-mini:active {
  transform: scale(0.98);
}

/* ========== 移动端顶部导航 ========== */
.mobile-bar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: #FFFFFF;
  border-bottom: 1px solid var(--line);
  z-index: 1100;
  align-items: center;
  padding: 0 24px;
  box-shadow: var(--shadow);
}

.mobile-brand {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-1);
}

.mobile-brand span {
  color: var(--primary);
}

.mobile-bar-btn {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text-1);
  padding: 8px;
  border-radius: 8px;
}

.mobile-bar-btn:hover {
  background: var(--bg-section);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: #FFFFFF;
  border-bottom: 1px solid var(--line);
  z-index: 1090;
  padding: 12px 16px 20px;
  box-shadow: var(--shadow);
}

.mobile-menu.expanded {
  display: block;
}

.mobile-menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 46px;
  padding: 0 16px;
  border-radius: 10px;
  color: var(--text-2);
  font-size: 15px;
  transition: var(--transition);
}

.mobile-menu-item i {
  width: 20px;
  text-align: center;
  color: var(--text-3);
}

.mobile-menu-item:hover,
.mobile-menu-item.active {
  background: #EAF2F8;
  color: var(--primary-deep);
  font-weight: 600;
}

.mobile-menu-item.active i {
  color: var(--primary);
}

.mobile-contact-row {
  margin-top: 12px;
  padding: 14px 16px 4px;
  border-top: 1px solid var(--line-light);
  font-size: 13px;
  color: var(--text-2);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-contact-row i {
  color: var(--primary);
  width: 18px;
}

/* ========== 内容区 ========== */
.site-main {
  margin-left: 240px;
  min-height: 100vh;
}

/* ========== 分类页小号 Hero ========== */
.page-hero {
  position: relative;
  min-height: 260px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  padding: 72px 0;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(28, 43, 54, 0.4);
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  color: #FFFFFF;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  max-width: 720px;
}

/* ========== 通用板块 ========== */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-section);
}

.section-head {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
}

.section-head-row .section-head {
  margin-bottom: 0;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 10px;
  font-weight: 600;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.4;
  margin-bottom: 10px;
}

.section-head p {
  font-size: 14px;
  color: var(--text-2);
}

.link-more {
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.link-more i {
  transition: transform 0.25s ease;
}

.link-more:hover i {
  transform: translateX(4px);
}

/* ========== 分类标签组 ========== */
.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-item {
  display: inline-block;
  padding: 9px 22px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  font-size: 14px;
  color: var(--text-2);
  cursor: pointer;
  transition: var(--transition);
}

.tag-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.tag-item.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(52, 120, 160, 0.2);
}

/* ========== 静态资讯列表 ========== */
.news-list {
  display: flex;
  flex-direction: column;
}

.news-item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line-light);
  transition: var(--transition);
}

.news-item:first-of-type {
  padding-top: 0;
}

.news-item:hover .news-title {
  color: var(--primary);
}

.news-time {
  flex: 0 0 64px;
  text-align: center;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 6px;
  box-shadow: var(--shadow);
}

.news-date {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.2;
}

.news-month {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 2px;
}

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

.news-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.5;
  transition: var(--transition);
}

.news-badge {
  display: inline-block;
  background: var(--accent);
  color: #FFFFFF;
  font-size: 11px;
  border-radius: 4px;
  padding: 2px 8px;
  margin-left: 8px;
  vertical-align: 2px;
  font-weight: 600;
}

.news-desc {
  font-size: 14px;
  color: var(--text-2);
  margin-top: 6px;
  max-width: 840px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.news-category {
  flex: 0 0 auto;
  align-self: center;
  background: #EAF2F8;
  color: var(--primary-deep);
  font-size: 13px;
  padding: 5px 14px;
  border-radius: 12px;
  font-weight: 600;
}

/* ========== 资讯价值区 ========== */
.value-grid {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.value-media {
  padding-right: 48px;
}

.value-media img {
  border-radius: 14px;
  box-shadow: var(--shadow-hover);
}

.value-content {
  padding-left: 48px;
}

.value-content h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 12px;
  line-height: 1.4;
}

.value-content > p {
  font-size: 15px;
  color: var(--text-2);
  margin-bottom: 20px;
  line-height: 1.8;
}

.value-list {
  list-style: none;
  margin-bottom: 24px;
}

.value-list li {
  font-size: 14px;
  color: var(--text-1);
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.value-list li i {
  color: var(--primary);
  font-size: 14px;
  margin-top: 4px;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-btn);
  color: var(--primary-deep);
  font-size: 14px;
  font-weight: 600;
  background: transparent;
  transition: var(--transition);
}

.btn-outline:hover {
  background: var(--primary);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-outline:active {
  transform: scale(0.98);
}

/* ========== 底部联系 CTA ========== */
.section-cta {
  background: linear-gradient(135deg, var(--primary-deep), var(--primary));
  padding: 80px 0;
}

.cta-info {
  color: #FFFFFF;
}

.cta-info h2 {
  font-size: 28px;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.4;
  margin-bottom: 12px;
}

.cta-info > p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
  max-width: 420px;
}

.cta-contact-list {
  list-style: none;
  margin-bottom: 24px;
}

.cta-contact-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 12px;
}

.cta-contact-list i {
  width: 20px;
  text-align: center;
  color: rgba(255, 255, 255, 0.9);
}

.cta-qr {
  width: 116px;
  height: 116px;
  border-radius: 12px;
  background: #FFFFFF;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-2);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.cta-qr i {
  font-size: 30px;
  color: var(--primary);
}

.cta-form-col {
  padding-left: 48px;
}

.cta-form-card {
  background: #FFFFFF;
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-item {
  flex: 1;
  margin-bottom: 16px;
}

.form-item label {
  display: block;
  font-size: 13px;
  color: var(--text-1);
  font-weight: 600;
  margin-bottom: 6px;
}

.form-item label em {
  color: var(--accent);
  font-style: normal;
  margin-right: 2px;
}

.form-item input,
.form-item textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-input);
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-1);
  background: #FBFDFF;
  transition: var(--transition);
  outline: none;
}

.form-item textarea {
  resize: vertical;
  min-height: 100px;
}

.form-item input::placeholder,
.form-item textarea::placeholder {
  color: var(--text-3);
}

.form-item input:hover,
.form-item textarea:hover {
  border-color: #B8CDDA;
}

.form-item input:focus,
.form-item textarea:focus {
  border-color: var(--primary);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(52, 120, 160, 0.15);
}

.btn-submit {
  width: 100%;
  height: 48px;
  border: none;
  border-radius: var(--radius-btn);
  background: var(--accent);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-submit:hover {
  background: #A93232;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(200, 62, 62, 0.3);
}

.btn-submit:active {
  transform: scale(0.98);
}

.btn-submit .spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #FFFFFF;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.btn-submit.loading .spinner {
  display: inline-block;
}

.btn-submit.success {
  background: #2F9E6E;
}

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

/* ========== 页脚 ========== */
.footer {
  background: var(--bg-section);
  border-top: 1px solid var(--line);
  padding-top: 56px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand-text {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 12px;
}

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

.footer-brand p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 360px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-1);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-2);
}

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

.footer-contact-list {
  list-style: none;
}

.footer-contact-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 12px;
}

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

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 16px 0;
  text-align: center;
  font-size: 12px;
  color: var(--text-3);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .sidebar {
    display: none;
  }

  .mobile-bar {
    display: flex;
    justify-content: space-between;
  }

  .site-main {
    margin-left: 0;
    padding-top: 64px;
  }

  .page-hero {
    min-height: 240px;
  }

  .container {
    padding: 0 28px;
  }

  .section {
    padding: 64px 0;
  }

  .section-cta {
    padding: 64px 0;
  }

  .cta-form-col {
    padding-left: 0;
    margin-top: 32px;
  }

  .value-media {
    padding-right: 0;
    margin-bottom: 28px;
  }

  .value-content {
    padding-left: 0;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }

  .section-cta {
    padding: 56px 0;
  }

  .section-head h2 {
    font-size: 26px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 32px;
  }

  .footer {
    padding-top: 44px;
  }

  .cta-info h2 {
    font-size: 24px;
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  .cta-form-card {
    padding: 22px;
  }

  .section-head-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 20px;
  }

  .page-hero {
    min-height: 220px;
    padding: 52px 0;
  }

  .page-hero h1 {
    font-size: 27px;
  }

  .page-hero p {
    font-size: 14px;
  }

  .news-item {
    flex-wrap: wrap;
    gap: 14px;
  }

  .news-time {
    flex: 0 0 56px;
  }

  .news-date {
    font-size: 20px;
  }

  .news-info {
    flex: 1 1 calc(100% - 72px);
  }

  .news-desc {
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .news-category {
    margin-left: 70px;
    align-self: flex-start;
  }

  .value-media img {
    border-radius: 12px;
  }

  .footer-bottom {
    padding: 14px 0;
    font-size: 12px;
  }

  .mobile-brand {
    font-size: 17px;
  }
}