/* roulang page: index */
:root {
  --primary: #1a3b3a;
  --primary-dark: #0e2827;
  --primary-soft: #e8eeed;
  --accent: #c4a265;
  --accent-soft: #f3e8d5;
  --bg: #f7f5ef;
  --card: #ffffff;
  --text: #1b211f;
  --muted: #6b7472;
  --line: #e3ded3;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --card-radius: 4px;
  --badge-radius: 2px;
  --img-radius: 2px;
  --shadow-hover: 0 8px 24px rgba(15, 35, 34, .06);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  scroll-padding-bottom: 80px;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .25s ease;
}

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

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

ul,
ol {
  list-style: none;
}

.container {
  max-width: 1160px;
  padding-left: 20px;
  padding-right: 20px;
  margin: 0 auto;
}

.section {
  padding: clamp(64px, 8vw, 120px) 0;
}

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

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  letter-spacing: .12em;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
  vertical-align: middle;
  margin-right: 10px;
}

.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
  margin: 0;
}

.section-head p {
  font-size: 15px;
  color: var(--muted);
  max-width: 480px;
  margin-top: 12px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 26px;
  border-radius: 0;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background-color .25s ease, border-color .25s ease, color .25s ease, box-shadow .25s ease;
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

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

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

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

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

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

.btn-lg {
  height: 52px;
  padding: 0 36px;
  font-size: 16px;
}

/* ===== Nav Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 1080;
  background: rgba(247, 245, 239, .92);
  border-bottom: 1px solid var(--line);
  transition: background-color .3s ease, box-shadow .3s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.site-header.scrolled {
  background: rgba(247, 245, 239, .98);
  box-shadow: 0 2px 12px rgba(15, 35, 34, .04);
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: .02em;
  line-height: 1;
  text-decoration: none;
  user-select: none;
}

.brand-cn {
  color: var(--primary);
  font-family: var(--font-serif);
}

.brand-split {
  color: var(--accent);
  font-family: var(--font-serif);
  border-left: 1px solid var(--line);
  margin-left: 8px;
  padding-left: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.nav-links > li {
  position: relative;
}

.nav-links > li > a {
  display: inline-flex;
  align-items: center;
  height: 64px;
  padding: 0 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  position: relative;
}

.nav-links > li > a:hover {
  color: var(--primary);
}

.nav-links > li > a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--accent);
}

.nav-cta {
  margin-left: 16px;
  flex-shrink: 0;
}

.dropdown-toggle::after {
  border: none;
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  content: '\f078';
  font-size: 10px;
  margin-left: 8px;
  transition: transform .25s ease;
}

.dropdown-toggle.show::after {
  transform: rotate(180deg);
}

.dropdown-menu {
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  box-shadow: none;
  padding: 8px;
  min-width: 180px;
  margin-top: 0 !important;
}

.dropdown-item {
  border-radius: 2px;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text);
  font-family: var(--font-sans);
}

.dropdown-item:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.dropdown-item:focus,
.dropdown-item:active {
  background: var(--primary-soft);
  color: var(--primary);
}

/* ===== Mobile Bottom Tab ===== */
.mobile-bottom-tab {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: #fff;
  border-top: 1px solid var(--line);
  z-index: 1090;
  align-items: stretch;
}

.mobile-bottom-tab .tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  background: transparent;
  border: none;
  padding: 0;
  font-size: 11px;
  color: var(--muted);
  cursor: pointer;
  text-decoration: none;
  font-family: var(--font-sans);
}

.mobile-bottom-tab .tab-item i {
  font-size: 19px;
}

.mobile-bottom-tab .tab-item.active {
  color: var(--primary);
  font-weight: 600;
}

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

.mobile-service-panel {
  position: fixed;
  bottom: 70px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  box-shadow: 0 10px 30px rgba(15, 35, 34, .12);
  padding: 8px;
  display: block;
  visibility: hidden;
  opacity: 0;
  transition: opacity .25s ease, transform .25s ease, visibility .25s;
  z-index: 1095;
  min-width: 160px;
}

.mobile-service-panel.show {
  visibility: visible;
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.mobile-service-panel a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  border-radius: 2px;
  transition: background-color .2s ease;
}

.mobile-service-panel a:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: calc(64px + clamp(64px, 10vh, 110px)) 0 0;
  background-image: linear-gradient(180deg, rgba(247, 245, 239, .96) 0%, rgba(247, 245, 239, .93) 100%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

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

.hero-row {
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5.2vw, 54px);
  line-height: 1.16;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 0;
  letter-spacing: .01em;
}

.hero-title-sub {
  display: block;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  color: var(--primary);
  margin-top: 14px;
  font-family: var(--font-serif);
}

.hero-desc {
  font-size: 15px;
  color: var(--muted);
  max-width: 380px;
  margin: 22px 0 0;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
}

.hero-image-wrap {
  position: relative;
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(15, 35, 34, .14);
  border: 1px solid var(--line);
}

.hero-image-wrap img {
  width: 100%;
  height: auto;
  border-radius: var(--card-radius);
}

.hero-image-float {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background: rgba(255, 255, 255, .96);
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 20px rgba(15, 35, 34, .10);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}

.hero-image-float i {
  color: var(--accent);
  font-size: 16px;
}

.hero-bottom {
  margin-top: clamp(48px, 6vw, 80px);
  border-top: 1px solid var(--line);
  padding: 24px 0;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 36px;
  margin: 0;
  padding: 0;
}

.hero-trust li {
  font-size: 13px;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-trust li::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

/* ===== Services ===== */
.services-section {
  background: var(--card);
}

.service-list {
  margin-top: 8px;
}

.service-row {
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 42px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color .25s ease;
}

.service-row:first-child {
  border-top: 1px solid var(--line);
}

.service-row:hover .service-index {
  color: var(--accent);
}

.service-row:hover .service-name {
  transform: translateX(4px);
}

.service-index {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  width: 80px;
  flex-shrink: 0;
  transition: color .25s ease;
}

.service-name {
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  width: 180px;
  flex-shrink: 0;
  transition: transform .25s ease;
}

.service-desc {
  flex: 1;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.85;
}

/* ===== Stats ===== */
.stats-section {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.stats-bar {
  display: flex;
  align-items: center;
  gap: clamp(40px, 6vw, 100px);
  flex-wrap: wrap;
}

.stats-main {
  flex: 0 0 auto;
}

.stats-number {
  font-family: var(--font-serif);
  font-size: clamp(68px, 9vw, 100px);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  display: block;
}

.stats-label {
  display: block;
  font-size: 14px;
  color: var(--muted);
  margin-top: 12px;
  letter-spacing: .04em;
}

.stats-main::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  margin-top: 18px;
}

.stats-side {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.stat-item {
  display: flex;
  align-items: baseline;
  gap: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.stat-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.stat-value {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  white-space: nowrap;
}

.stat-text {
  font-size: 14px;
  color: var(--muted);
}

/* ===== Cases ===== */
.cases-section {
  background: var(--card);
}

.case-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  margin-bottom: 32px;
}

.case-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.case-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 2px 2px 0 0;
}

.case-body {
  padding: 26px 28px 28px;
}

.case-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.case-text {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.case-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s ease, color .2s ease;
}

.case-link:hover {
  color: var(--accent);
  gap: 10px;
}

/* ===== Solutions ===== */
.solutions-section {
  background: var(--primary-soft);
}

.solution-timeline {
  position: relative;
  padding-left: 0;
}

.solution-timeline::before {
  content: '';
  position: absolute;
  left: 27px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--line);
}

.solution-item {
  display: flex;
  gap: 36px;
  margin-bottom: 52px;
  position: relative;
}

.solution-item:last-child {
  margin-bottom: 0;
}

.solution-node {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--accent);
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 4px solid var(--bg);
  box-shadow: 0 0 0 1px var(--line);
}

.solution-body {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  padding: 28px 32px;
  transition: border-color .25s ease, box-shadow .25s ease;
}

.solution-body:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.solution-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  font-family: var(--font-serif);
}

.solution-body p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.75;
  margin: 0;
}

/* ===== News ===== */
.news-section {
  background: var(--card);
}

.more-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s ease;
}

.more-link:hover {
  color: var(--accent);
  gap: 10px;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-row {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  padding: 22px 28px;
  text-decoration: none;
  color: var(--text);
  gap: 0;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}

.news-row:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  color: var(--text);
}

.news-date-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 72px;
  height: 72px;
  background: var(--primary-soft);
  border-radius: 2px;
  margin-right: 28px;
  flex-shrink: 0;
  transition: background-color .25s ease;
}

.news-day {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--primary);
  transition: color .25s ease;
}

.news-month {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
  transition: color .25s ease;
}

.news-row:hover .news-date-box {
  background: var(--accent);
}

.news-row:hover .news-day {
  color: #fff;
}

.news-row:hover .news-month {
  color: rgba(255, 255, 255, .85);
}

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

.news-title {
  display: block;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-excerpt {
  display: block;
  font-size: 14px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.6;
}

.news-extra {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  margin-left: 24px;
  flex-shrink: 0;
}

.news-readmore {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  white-space: nowrap;
  transition: color .2s ease;
}

.news-row:hover .news-readmore {
  color: var(--accent);
}

.news-empty {
  border: 1px dashed var(--line);
  border-radius: var(--card-radius);
  padding: 48px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  background: var(--bg);
}

/* Badge */
.badge {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--badge-radius);
  white-space: nowrap;
}

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

.accordion {
  max-width: 820px;
}

.accordion-item {
  background: var(--card);
  border: none;
  border-radius: 0 !important;
  border-bottom: 1px solid var(--line);
}

.accordion-item:first-child {
  border-top: 1px solid var(--line);
}

.accordion-button {
  background: transparent;
  border: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  padding: 22px 48px 22px 20px;
  font-family: var(--font-sans);
  border-radius: 0 !important;
  box-shadow: none;
  position: relative;
  transition: background-color .25s ease;
}

.accordion-button:not(.collapsed) {
  background: var(--primary-soft);
  color: var(--primary);
  box-shadow: none;
}

.accordion-button:focus {
  box-shadow: none;
  border: none;
  outline: none;
}

.accordion-button::after {
  background: none;
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  content: '\f067';
  transform: none;
  transition: transform .25s ease;
  position: absolute;
  right: 20px;
  color: var(--primary);
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.accordion-button:not(.collapsed)::after {
  transform: rotate(45deg);
}

.accordion-collapse {
  border: none;
}

.accordion-body {
  padding: 4px 48px 24px 20px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
  background: var(--card);
  border-top: none;
}

.accordion-item.expanded .accordion-body {
  background: var(--primary-soft);
}

/* ===== Contact ===== */
.contact-section {
  background: var(--primary);
  color: #fff;
}

.contact-section .section-eyebrow {
  color: var(--accent);
}

.contact-section .section-eyebrow::before {
  background: var(--accent);
}

.contact-section .section-head h2 {
  color: #fff;
}

.contact-intro {
  font-size: 14px;
  color: rgba(255, 255, 255, .75);
  margin-top: 16px;
  max-width: 380px;
  line-height: 1.8;
}

.contact-list {
  margin-top: 36px;
  padding: 0;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 15px;
  color: rgba(255, 255, 255, .9);
  margin-bottom: 20px;
  line-height: 1.6;
}

.contact-list li i {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, .08);
  border-radius: 50%;
  color: var(--accent);
  font-size: 15px;
  flex-shrink: 0;
}

.contact-form {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--card-radius);
  padding: 40px;
}

.form-field {
  margin-bottom: 28px;
}

.form-field label {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, .7);
  margin-bottom: 8px;
  letter-spacing: .03em;
}

.required {
  color: var(--accent);
}

.form-field input,
.form-field textarea {
  display: block;
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, .3);
  border-radius: 0;
  padding: 10px 0;
  font-size: 15px;
  font-family: var(--font-sans);
  color: #fff;
  transition: border-color .25s ease, box-shadow .25s ease;
}

.form-field input:focus,
.form-field textarea:focus {
  border-bottom-color: var(--accent);
  box-shadow: 0 2px 0 0 var(--accent);
  outline: none;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: rgba(255, 255, 255, .35);
}

.form-field textarea {
  min-height: 120px;
  resize: vertical;
}

.form-success {
  display: none;
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(196, 162, 101, .14);
  border: 1px solid rgba(196, 162, 101, .4);
  border-radius: var(--card-radius);
  color: var(--accent-soft);
  font-size: 14px;
  text-align: center;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, .78);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
  letter-spacing: .02em;
  font-family: var(--font-serif);
}

.footer-logo .brand-split {
  color: var(--accent);
  border-left: 1px solid rgba(255, 255, 255, .25);
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .6);
  margin-top: 16px;
  max-width: 260px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: .06em;
}

.footer-col ul {
  padding: 0;
  margin: 0;
}

.footer-col ul li {
  font-size: 13px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .6);
}

.footer-col a {
  color: rgba(255, 255, 255, .6);
  text-decoration: none;
  transition: color .25s ease;
}

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

.footer-bottom {
  padding: 24px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, .5);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.footer-bottom a {
  color: rgba(255, 255, 255, .6);
  text-decoration: none;
}

/* ===== Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s ease, transform .6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
  .desktop-nav,
  .nav-cta {
    display: none !important;
  }

  .site-header {
    height: 56px;
  }

  .main-nav {
    height: 56px;
  }

  .navbar-brand {
    font-size: 20px;
  }

  .mobile-bottom-tab {
    display: flex;
  }

  body {
    padding-bottom: 80px;
  }

  .hero {
    padding-top: calc(56px + 48px);
  }

  .hero-row {
    flex-direction: column;
    gap: 36px;
  }

  .hero-visual {
    width: 100%;
    max-width: 520px;
  }

  .stats-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .stats-main {
    width: 100%;
  }

  .stats-side {
    width: 100%;
  }

  .solution-timeline::before {
    left: 24px;
  }

  .solution-node {
    width: 48px;
    height: 48px;
    font-size: 17px;
  }

  .solution-item {
    gap: 20px;
  }

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

@media (max-width: 767.98px) {
  .hero-title {
    font-size: 34px;
  }

  .hero-title-sub {
    font-size: 20px;
  }

  .hero-desc {
    font-size: 14px;
  }

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

  .hero-trust {
    gap: 10px 18px;
  }

  .service-row {
    flex-wrap: wrap;
    gap: 12px;
    padding: 28px 0;
  }

  .service-index {
    width: auto;
    font-size: 15px;
  }

  .service-name {
    width: auto;
    font-size: 20px;
  }

  .service-desc {
    flex-basis: 100%;
    font-size: 14px;
  }

  .news-row {
    flex-wrap: wrap;
    padding: 20px;
  }

  .news-date-box {
    width: 60px;
    height: 60px;
    margin-right: 16px;
  }

  .news-day {
    font-size: 22px;
  }

  .news-title {
    font-size: 15px;
    white-space: normal;
  }

  .news-excerpt {
    font-size: 13px;
    white-space: normal;
  }

  .news-extra {
    flex-direction: row;
    align-items: center;
    margin-left: 0;
    margin-top: 12px;
    width: 100%;
    justify-content: space-between;
  }

  .contact-form {
    padding: 28px 22px;
  }

  .form-field textarea {
    min-height: 100px;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .solution-body {
    padding: 20px;
  }

  .solution-body h3 {
    font-size: 18px;
  }

  .solution-timeline::before {
    left: 22px;
  }

  .solution-node {
    width: 44px;
    height: 44px;
    font-size: 15px;
  }
}

@media (max-width: 575.98px) {
  .hero-title {
    font-size: 30px;
  }

  .hero-title-sub {
    font-size: 18px;
  }

  .hero-bottom {
    padding: 18px 0;
  }

  .stat-value {
    font-size: 30px;
  }

  .stats-number {
    font-size: 64px;
  }

  .section-head h2 {
    font-size: 28px;
  }

  .accordion-button {
    font-size: 15px;
    padding-left: 14px;
    padding-right: 40px;
  }

  .accordion-body {
    padding-left: 14px;
  }

  .case-body {
    padding: 20px;
  }

  .case-title {
    font-size: 18px;
  }

  .mobile-service-panel {
    min-width: 140px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #1a3b3a;
            --primary-dark: #0e2827;
            --primary-soft: #e8eeed;
            --accent: #c4a265;
            --accent-soft: #f3e8d5;
            --bg: #f7f5ef;
            --card: #ffffff;
            --text: #1b211f;
            --muted: #6b7472;
            --line: #e3ded3;
            --radius: 4px;
            --radius-sm: 2px;
            --shadow: 0 8px 24px rgba(15, 35, 34, .06);
            --font-title: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
            --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
            --transition: all .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-body);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            padding-top: 64px;
        }

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

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

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

        .container {
            max-width: 1160px;
            padding-left: 20px;
            padding-right: 20px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-title);
            font-weight: 700;
            line-height: 1.2;
            color: var(--text);
        }

        .section-padding {
            padding: clamp(64px, 8vw, 120px) 0;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

        /* ==================== 按钮 ==================== */
        .btn {
            font-family: var(--font-body);
            font-weight: 500;
            border-radius: 0;
            height: 44px;
            padding: 0 26px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            letter-spacing: .02em;
            transition: var(--transition);
            border: 1px solid transparent;
            white-space: nowrap;
        }

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

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        .btn-outline-primary {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline-primary:hover,
        .btn-outline-primary:focus {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .btn:disabled {
            opacity: .5;
            pointer-events: none;
        }

        /* ==================== 导航 ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: rgba(247, 245, 239, .92);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--line);
            z-index: 1040;
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(247, 245, 239, .98);
            box-shadow: 0 2px 16px rgba(15, 35, 34, .06);
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            font-family: var(--font-title);
            font-size: 22px;
            font-weight: 800;
            line-height: 1;
            letter-spacing: .01em;
            text-decoration: none;
        }

        .navbar-brand .brand-cn {
            color: var(--primary);
        }

        .navbar-brand .brand-split {
            color: var(--accent);
            margin-left: 2px;
        }

        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
        }

        .nav-links>li>a,
        .nav-links>li>.dropdown-toggle {
            display: inline-flex;
            align-items: center;
            height: 64px;
            padding: 0 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            text-decoration: none;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
            background: none;
            border-top: none;
            border-left: none;
            border-right: none;
        }

        .nav-links>li>a:hover,
        .nav-links>li>a.active,
        .nav-links>li>.dropdown-toggle:hover,
        .nav-links>li>.dropdown-toggle.active {
            color: var(--primary);
            border-bottom-color: var(--accent);
        }

        .nav-links .dropdown-menu {
            border-radius: 0 0 var(--radius) var(--radius);
            border: 1px solid var(--line);
            border-top: 2px solid var(--accent);
            padding: 8px 0;
            box-shadow: var(--shadow);
            margin-top: 0;
            background: var(--card);
        }

        .nav-links .dropdown-menu .dropdown-item {
            font-size: 14px;
            padding: 9px 24px;
            color: var(--text);
            font-weight: 400;
            transition: var(--transition);
        }

        .nav-links .dropdown-menu .dropdown-item:hover,
        .nav-links .dropdown-menu .dropdown-item:focus,
        .nav-links .dropdown-menu .dropdown-item.active {
            background: var(--primary-soft);
            color: var(--primary);
            font-weight: 500;
        }

        .nav-cta {
            margin-left: 8px;
        }

        .dropdown-toggle::after {
            margin-left: 6px;
            font-size: 10px;
        }

        /* ==================== 移动端底部Tab ==================== */
        .bottom-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: #fff;
            border-top: 1px solid var(--line);
            z-index: 1050;
            align-items: stretch;
            justify-content: space-around;
        }

        .bottom-tabbar .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            color: var(--muted);
            font-size: 11px;
            text-decoration: none;
            transition: var(--transition);
        }

        .bottom-tabbar .tab-item i {
            font-size: 18px;
        }

        .bottom-tabbar .tab-item.active,
        .bottom-tabbar .tab-item:hover {
            color: var(--primary);
        }

        .bottom-tabbar .tab-item.active i {
            color: var(--primary);
        }

        .bottom-tabbar .tab-dropup {
            position: relative;
        }

        .bottom-tabbar .tab-main {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            color: var(--muted);
            font-size: 11px;
            text-decoration: none;
            background: none;
            border: none;
            width: 100%;
            height: 100%;
            padding: 0;
            transition: var(--transition);
        }

        .bottom-tabbar .tab-main i {
            font-size: 18px;
        }

        .bottom-tabbar .tab-main:hover {
            color: var(--primary);
        }

        .bottom-tabbar .dropup .dropdown-menu {
            position: absolute;
            bottom: calc(100% + 8px);
            left: 50%;
            transform: translateX(-50%);
            border-radius: var(--radius);
            border: 1px solid var(--line);
            box-shadow: var(--shadow);
            padding: 6px 0;
            min-width: 140px;
            background: var(--card);
            margin-bottom: 0;
        }

        .bottom-tabbar .dropup .dropdown-menu .dropdown-item {
            font-size: 13px;
            padding: 8px 20px;
            text-align: center;
            color: var(--text);
        }

        .bottom-tabbar .dropup .dropdown-menu .dropdown-item:hover,
        .bottom-tabbar .dropup .dropdown-menu .dropdown-item.active {
            background: var(--primary-soft);
            color: var(--primary);
        }

        @media (max-width: 991.98px) {
            body {
                padding-bottom: 80px;
            }
            .bottom-tabbar {
                display: flex;
            }
            .desktop-nav {
                display: none !important;
            }
            .nav-cta {
                display: none !important;
            }
        }

        /* ==================== 页脚 ==================== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, .75);
            padding: 70px 0 0;
            margin-top: 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 50px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .site-footer h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            font-family: var(--font-body);
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer ul li {
            margin-bottom: 10px;
            font-size: 14px;
            line-height: 1.7;
        }

        .site-footer ul li a {
            color: rgba(255, 255, 255, .75);
            text-decoration: none;
            transition: var(--transition);
        }

        .site-footer ul li a:hover {
            color: var(--accent);
        }

        .footer-logo {
            display: inline-flex;
            font-family: var(--font-title);
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            margin-bottom: 14px;
        }

        .footer-logo .brand-split {
            color: var(--accent);
            margin-left: 2px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .65);
            max-width: 280px;
            margin-top: 8px;
        }

        .footer-bottom {
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
            flex-wrap: wrap;
            gap: 8px;
        }

        @media (max-width: 991.98px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ==================== 分类页 Hero ==================== */
        .page-hero {
            position: relative;
            min-height: 300px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(14, 40, 39, .96) 0%, rgba(26, 59, 58, .92) 55%, rgba(26, 59, 58, .85) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            color: #fff;
            padding: 56px 0;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 260px;
            height: 260px;
            border: 1px solid rgba(196, 162, 101, .25);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0 0 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, .6);
            gap: 6px;
        }

        .page-hero .breadcrumb a {
            color: rgba(255, 255, 255, .7);
            text-decoration: none;
        }

        .page-hero .breadcrumb a:hover {
            color: var(--accent);
        }

        .page-hero .breadcrumb .sep {
            margin: 0 2px;
            opacity: .5;
        }

        .page-hero .breadcrumb .current {
            color: var(--accent);
        }

        .page-hero h1 {
            font-size: clamp(34px, 4vw, 48px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: .01em;
        }

        .page-hero .hero-sub {
            font-size: 16px;
            color: rgba(255, 255, 255, .85);
            max-width: 500px;
            line-height: 1.7;
            margin: 0;
        }

        .page-hero .hero-divider {
            width: 48px;
            height: 3px;
            background: var(--accent);
            border: none;
            margin: 18px 0;
        }

        /* ==================== 大图叙事 ==================== */
        .feature-image-section {
            padding-top: 0;
            margin-top: -40px;
            position: relative;
            z-index: 2;
        }

        .feature-image-wrap {
            background: var(--card);
            border-radius: var(--radius);
            border: 1px solid var(--line);
            overflow: hidden;
            box-shadow: var(--shadow);
            position: relative;
        }

        .feature-image-wrap img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            border-radius: var(--radius) var(--radius) 0 0;
            display: block;
        }

        .feature-image-caption {
            padding: 28px 36px 32px;
            border-top: 1px solid var(--line);
            background: var(--card);
        }

        .feature-image-caption h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .feature-image-caption p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.7;
            margin: 0;
        }

        /* ==================== 目录 + 内容 ==================== */
        .detail-section {
            padding: clamp(60px, 7vw, 100px) 0;
        }

        .side-nav {
            position: sticky;
            top: 96px;
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 24px 0;
            margin-bottom: 30px;
        }

        .side-nav-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--muted);
            text-transform: uppercase;
            letter-spacing: .08em;
            padding: 0 28px 14px;
            border-bottom: 1px solid var(--line);
            margin-bottom: 8px;
            font-family: var(--font-body);
        }

        .side-nav ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .side-nav ul li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 28px;
            font-size: 15px;
            color: var(--text);
            text-decoration: none;
            border-left: 2px solid transparent;
            transition: var(--transition);
        }

        .side-nav ul li a i {
            width: 20px;
            text-align: center;
            font-size: 14px;
            color: var(--accent);
            opacity: 0.8;
        }

        .side-nav ul li a:hover,
        .side-nav ul li a.active {
            background: var(--primary-soft);
            color: var(--primary);
            border-left-color: var(--accent);
            font-weight: 500;
        }

        .detail-content {
            padding-bottom: 10px;
        }

        .detail-block {
            margin-bottom: 56px;
        }

        .detail-block:last-child {
            margin-bottom: 0;
        }

        .detail-block-title {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 18px;
        }

        .detail-block-title .num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            font-family: var(--font-title);
            font-weight: 700;
            font-size: 15px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .detail-block-title h2 {
            font-size: 26px;
            font-weight: 700;
            margin: 0;
            color: var(--primary);
        }

        .detail-block p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--muted);
            margin-bottom: 14px;
        }

        .detail-block p:last-child {
            margin-bottom: 0;
        }

        .detail-block .highlight-box {
            background: var(--primary-soft);
            border-left: 3px solid var(--accent);
            padding: 18px 22px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 20px 0 10px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text);
        }

        .detail-block .highlight-box strong {
            color: var(--primary);
        }

        /* ==================== 数据指标 ==================== */
        .metrics-section {
            background: var(--primary-dark);
            padding: clamp(56px, 6vw, 86px) 0;
            color: #fff;
        }

        .metrics-section .section-title {
            color: #fff;
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 700;
            margin-bottom: 12px;
            font-family: var(--font-title);
        }

        .metrics-section .section-sub {
            color: rgba(255, 255, 255, .6);
            font-size: 15px;
            margin-bottom: 40px;
            max-width: 480px;
        }

        .metric-card {
            background: rgba(255, 255, 255, .04);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: var(--radius);
            padding: 32px 24px;
            transition: var(--transition);
            height: 100%;
        }

        .metric-card:hover {
            background: rgba(255, 255, 255, .07);
            transform: translateY(-2px);
        }

        .metric-card .metric-value {
            font-family: var(--font-title);
            font-size: 44px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .metric-card .metric-value .unit {
            font-size: 24px;
            font-weight: 600;
            margin-left: 2px;
        }

        .metric-card .metric-label {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            line-height: 1.5;
        }

        .metric-card .metric-divider {
            width: 32px;
            height: 2px;
            background: var(--accent);
            margin-bottom: 16px;
            opacity: .6;
        }

        /* ==================== CTA ==================== */
        .cta-section {
            padding: clamp(64px, 8vw, 100px) 0;
            background: var(--bg);
        }

        .cta-inner {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius);
            padding: clamp(40px, 6vw, 64px);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            right: -40px;
            bottom: -40px;
            width: 160px;
            height: 160px;
            border: 2px solid rgba(196, 162, 101, .2);
            border-radius: 50%;
        }

        .cta-inner .cta-text h3 {
            color: #fff;
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            margin-bottom: 8px;
            font-family: var(--font-title);
        }

        .cta-inner .cta-text p {
            color: rgba(255, 255, 255, .7);
            font-size: 15px;
            margin: 0;
            max-width: 520px;
        }

        .cta-inner .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .cta-inner .btn-light-custom {
            background: var(--accent);
            color: #fff;
            border: 1px solid var(--accent);
        }

        .cta-inner .btn-light-custom:hover {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }

        .cta-inner .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .6);
        }

        .cta-inner .btn-outline-light:hover {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }

        /* ==================== 联系表单 ==================== */
        .contact-form-wrap {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 40px;
            max-width: 520px;
        }

        .contact-form-wrap .form-label {
            font-size: 13px;
            color: var(--muted);
            font-weight: 500;
            margin-bottom: 8px;
            display: block;
        }

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

        .contact-form-wrap .form-control {
            border: none;
            border-bottom: 1px solid var(--line);
            border-radius: 0;
            padding: 10px 0;
            font-size: 15px;
            background: transparent;
            color: var(--text);
            transition: var(--transition);
            box-shadow: none;
        }

        .contact-form-wrap .form-control:focus {
            border-bottom-color: var(--primary);
            box-shadow: 0 2px 0 0 var(--primary);
            background: transparent;
            color: var(--text);
        }

        .contact-form-wrap textarea.form-control {
            height: auto;
            min-height: 120px;
            resize: vertical;
        }

        /* ==================== 响应式 ==================== */
        @media (max-width: 991.98px) {
            .feature-image-wrap img {
                height: 260px;
            }

            .side-nav {
                position: static;
                top: auto;
                margin-bottom: 30px;
            }

            .side-nav ul {
                display: flex;
                flex-wrap: wrap;
                padding: 8px 12px;
                gap: 4px;
            }

            .side-nav ul li a {
                padding: 8px 14px;
                border-left: none;
                border-bottom: 2px solid transparent;
                border-radius: var(--radius-sm);
                font-size: 14px;
            }

            .side-nav ul li a:hover,
            .side-nav ul li a.active {
                background: var(--primary-soft);
                border-left: none;
                border-bottom-color: var(--accent);
            }
        }

        @media (max-width: 767.98px) {
            body {
                font-size: 15px;
            }

            .page-hero {
                min-height: 260px;
                padding: 40px 0;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .feature-image-caption {
                padding: 20px;
            }

            .feature-image-wrap img {
                height: 200px;
            }

            .detail-block-title h2 {
                font-size: 22px;
            }

            .detail-block-title .num {
                width: 34px;
                height: 34px;
                font-size: 13px;
            }

            .metric-card {
                margin-bottom: 20px;
            }

            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }

            .contact-form-wrap {
                padding: 28px;
            }
        }

        @media (max-width: 575.98px) {
            .navbar-brand {
                font-size: 19px;
            }

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

            .feature-image-caption h3 {
                font-size: 18px;
            }

            .detail-block p {
                font-size: 14px;
            }

            .highlight-box {
                font-size: 13px !important;
                padding: 14px 16px;
            }

            .metric-card .metric-value {
                font-size: 36px;
            }

            .cta-inner .cta-actions .btn {
                width: 100%;
            }

            .cta-inner .cta-actions .btn+.btn {
                margin-left: 0;
            }
        }

        /* ==================== 通用辅助类 ==================== */
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .1em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 12px;
            font-family: var(--font-body);
        }

        .section-label::before {
            content: '';
            width: 28px;
            height: 2px;
            background: var(--accent);
            display: inline-block;
        }

        .section-title {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text);
        }

        .section-sub {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            max-width: 560px;
        }

        .reveal {
            opacity: 0;
            transform: translateY(12px);
            transition: opacity .6s ease, transform .6s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (prefers-reduced-motion: reduce) {
            .reveal {
                opacity: 1;
                transform: none;
                transition: none;
            }
        }

/* roulang page: article */
:root {
  --primary: #1a3b3a;
  --primary-dark: #0e2827;
  --primary-soft: #e8eeed;
  --accent: #c4a265;
  --accent-soft: #f3e8d5;
  --bg: #f7f5ef;
  --card: #ffffff;
  --text: #1b211f;
  --muted: #6b7472;
  --line: #e3ded3;
  --font-serif: "Noto Serif SC","Source Han Serif SC","SimSun",serif;
  --font-sans: "Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --shadow-hover: 0 8px 24px rgba(15,35,34,.06);
  --transition: .25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  padding-bottom: 60px;
}
@media (min-width: 992px) { body { padding-bottom: 0; } }
img { max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
ul, ol { list-style: none; }
button, input, textarea { font: inherit; }

.container { max-width: 1160px; padding-left: 20px; padding-right: 20px; }

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background: rgba(247,245,239,.92);
  border-bottom: 1px solid var(--line);
  z-index: 1030;
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.header-scrolled {
  background: rgba(247,245,239,.98);
  box-shadow: 0 2px 16px rgba(15,35,34,.06);
}
.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.navbar-brand { display: flex; align-items: baseline; font-family: var(--font-serif); font-size: 24px; font-weight: 800; white-space: nowrap; }
.brand-cn { color: var(--primary); }
.brand-split { color: var(--accent); margin-left: 2px; font-size: 18px; font-weight: 700; border-left: 1px solid var(--line); padding-left: 8px; }
.nav-links { display: flex; align-items: center; gap: 32px; margin: 0; }
.nav-links > li > a { display: block; padding: 21px 0 19px; font-size: 15px; font-weight: 500; color: var(--text); border-bottom: 2px solid transparent; transition: color var(--transition), border-color var(--transition); }
.nav-links > li > a:hover,
.nav-links > li > a.active { color: var(--primary); border-bottom-color: var(--accent); }
.dropdown-menu { border: 1px solid var(--line); border-radius: 4px; box-shadow: var(--shadow-hover); padding: 8px 0; background: #fff; margin-top: 8px; min-width: 160px; }
.dropdown-item { padding: 10px 20px; font-size: 14px; color: var(--text); transition: background var(--transition), color var(--transition); }
.dropdown-item:hover { background: var(--primary-soft); color: var(--primary); }
.nav-cta { height: 38px; padding: 0 20px; font-size: 14px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 0;
  border: 1px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
  line-height: 1;
  background: transparent;
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--line); }
.btn-outline:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn:focus-visible { outline: 3px solid rgba(196,162,101,.5); outline-offset: 2px; }

.post-hero {
  position: relative;
  padding: 128px 0 52px;
  background: var(--primary-dark);
  color: #fff;
  overflow: hidden;
}
.post-hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: .22;
}
.post-hero .container { position: relative; z-index: 1; }
.page-breadcrumb { font-size: 13px; color: rgba(255,255,255,.75); margin-bottom: 24px; }
.page-breadcrumb a { color: rgba(255,255,255,.8); }
.page-breadcrumb a:hover { color: var(--accent); }
.page-breadcrumb .sep { margin: 0 10px; opacity: .5; }
.page-breadcrumb .current { color: var(--accent); }
.post-hero h1 {
  font-family: var(--font-serif);
  font-size: 38px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  max-width: 800px;
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,.75);
}
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.meta-divider { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); display: inline-block; }

.post-main { background: var(--bg); padding: 56px 0 72px; }
.container-narrow { max-width: 720px; margin: 0 auto; }
.post-content { font-size: 16px; line-height: 1.75; color: var(--text); }
.post-content p { margin-bottom: 1.5em; }
.post-content h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin: 2.2em 0 .8em;
}
.post-content h4 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin: 2em 0 .6em;
}
.post-content blockquote {
  border-left: 3px solid var(--accent);
  background: var(--primary-soft);
  padding: 16px 24px;
  border-radius: 0 4px 4px 0;
  color: var(--muted);
  margin-bottom: 1.5em;
}
.post-content img { max-width: 100%; border: 1px solid var(--line); border-radius: 4px; }
.post-content ul, .post-content ol { padding-left: 1.4em; margin-bottom: 1.5em; }
.post-content ul { list-style: disc; }
.post-content ol { list-style: decimal; }
.post-content li { margin-bottom: .5em; }
.post-content a { border-bottom: 1px solid var(--accent); }
.post-content a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.post-content table { width: 100%; border-collapse: collapse; margin-bottom: 1.5em; }
.post-content table th, .post-content table td { border: 1px solid var(--line); padding: 10px 12px; font-size: 14px; }
.post-content table th { background: var(--primary-soft); font-weight: 600; }

.post-back { margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--line); text-align: center; }
.empty-state {
  border: 2px dashed var(--line);
  border-radius: 8px;
  padding: 64px 24px;
  text-align: center;
  background: var(--card);
}
.empty-state h3 { font-family: var(--font-serif); font-size: 22px; color: var(--primary); margin-bottom: 12px; }
.empty-state p { color: var(--muted); margin-bottom: 24px; }

.related-posts {
  padding: clamp(64px, 8vw, 96px) 0;
  background: var(--bg);
  border-top: 1px solid var(--line);
}
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 36px; }
.section-head h2 { font-family: var(--font-serif); font-size: 30px; font-weight: 800; color: var(--primary); margin: 0; }
.section-head .section-more { font-size: 14px; color: var(--muted); }
.section-head .section-more:hover { color: var(--accent); }
.related-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  height: 100%;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.related-card:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow-hover); }
.related-thumb { aspect-ratio: 16 / 9; overflow: hidden; background: var(--primary-soft); }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s ease; }
.related-card:hover .related-thumb img { transform: scale(1.03); }
.related-body { padding: 18px 20px 20px; }
.related-date { font-size: 12px; color: var(--muted); }
.related-body h3 { font-family: var(--font-serif); font-size: 16px; font-weight: 700; color: var(--text); margin: 8px 0 12px; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.read-more { font-size: 13px; color: var(--primary); font-weight: 600; transition: color var(--transition); }
.related-card:hover .read-more { color: var(--accent); }

.contact-cta {
  background: var(--primary);
  color: #fff;
  padding: clamp(64px, 8vw, 100px) 0;
}
.contact-cta h2 { font-family: var(--font-serif); font-size: 30px; font-weight: 800; margin-bottom: 16px; }
.contact-cta .sub { color: rgba(255,255,255,.75); margin-bottom: 8px; font-size: 15px; }
.contact-cta .contact-line { display: block; margin-bottom: 6px; color: rgba(255,255,255,.65); font-size: 14px; }
.contact-form { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.15); padding: 32px; border-radius: 4px; }
.contact-form label { display: block; font-size: 13px; color: rgba(255,255,255,.8); margin-bottom: 8px; }
.contact-form .required { color: var(--accent); }
.contact-form .form-control {
  background: transparent;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 0;
  color: #fff;
  padding: 10px 14px;
  transition: border-color var(--transition);
}
.contact-form .form-control:focus { outline: none; box-shadow: none; border-color: var(--accent); background: rgba(255,255,255,.06); }
.contact-form .form-control::placeholder { color: rgba(255,255,255,.4); }
.contact-form textarea.form-control { resize: vertical; min-height: 90px; }

.site-footer { background: var(--primary-dark); color: rgba(255,255,255,.7); padding: 64px 0 24px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-logo { display: flex; align-items: baseline; font-family: var(--font-serif); font-size: 22px; font-weight: 800; color: #fff; margin-bottom: 14px; }
.footer-logo .brand-split { color: var(--accent); font-size: 16px; border-left: 1px solid rgba(255,255,255,.2); padding-left: 8px; margin-left: 2px; }
.footer-brand p { color: rgba(255,255,255,.55); line-height: 1.7; max-width: 280px; }
.footer-col h4 { font-size: 15px; color: #fff; font-weight: 600; margin-bottom: 16px; }
.footer-col ul { padding: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,.65); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); color: rgba(255,255,255,.4); font-size: 13px; }

.mobile-tabbar {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 60px;
  background: #fff;
  border-top: 1px solid var(--line);
  z-index: 1040;
  align-items: stretch;
}
.mobile-tabbar .tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 11px;
  gap: 3px;
  transition: color var(--transition);
  width: 100%;
  height: 100%;
}
.mobile-tabbar .tab-item i { font-size: 18px; line-height: 1; }
.mobile-tabbar .tab-item.active { color: var(--primary); }
.mobile-tabbar .tab-item:hover { color: var(--primary); }
.mobile-tabbar .dropdown { flex: 1; display: flex; position: relative; }
.mobile-tabbar .dropdown > .tab-item { flex: 1; }
.mobile-tabbar .dropdown-menu {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 8px;
  min-width: 160px;
  border: 1px solid var(--line);
  border-radius: 4px;
  box-shadow: var(--shadow-hover);
  padding: 8px 0;
  background: #fff;
}

.reveal { opacity: 0; transform: translateY(12px); transition: opacity .6s ease, transform .6s ease; }
.reveal.revealed { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}

@media (max-width: 991.98px) {
  .desktop-nav { display: none; }
  .nav-cta { display: none; }
  .site-header { height: 56px; }
  .main-nav { height: 56px; }
  .navbar-brand { font-size: 21px; }
  .brand-split { font-size: 16px; }
  .mobile-tabbar { display: flex; }
  .related-card { margin-bottom: 20px; }
}
@media (max-width: 767.98px) {
  .post-hero { padding: 104px 0 40px; }
  .post-hero h1 { font-size: 26px; }
  .post-main { padding: 40px 0 56px; }
  .section-head h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .contact-form { padding: 20px; }
}
@media (max-width: 575.98px) {
  .footer-grid { grid-template-columns: 1fr; }
  .contact-form { padding: 18px; }
  .post-meta { gap: 8px; font-size: 12px; }
}

/* roulang page: category3 */
:root {
  --primary: #1a3b3a;
  --primary-dark: #0e2827;
  --primary-soft: #e8eeed;
  --accent: #c4a265;
  --accent-soft: #f3e8d5;
  --bg: #f7f5ef;
  --card: #ffffff;
  --text: #1b211f;
  --muted: #6b7472;
  --line: #e3ded3;
  --radius: 4px;
  --shadow: 0 2px 0 rgba(15, 35, 34, 0.04);
  --shadow-hover: 0 8px 24px rgba(15, 35, 34, 0.06);
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --section-space: clamp(64px, 8vw, 120px);
  --header-h: 64px;
  --tab-bar-h: 60px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.25s ease;
}

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

.container {
  max-width: 1160px;
  padding-left: 20px;
  padding-right: 20px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 1200px) {
  .container {
    max-width: 1160px;
  }
}

/* ========== 按钮 ========== */
.btn {
  border-radius: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  height: 44px;
  padding: 0 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

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

.btn-primary:hover, .btn-primary:focus {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: none;
}

.btn-outline-primary {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline-primary:hover, .btn-outline-primary:focus {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn:focus, .btn:active {
  outline: 2px solid rgba(196, 162, 101, 0.5);
  outline-offset: 2px;
  box-shadow: none;
}

.btn.disabled, .btn:disabled {
  opacity: 0.55;
  pointer-events: none;
}

.btn .fa {
  margin-right: 8px;
  font-size: 14px;
}

/* ========== 导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(247, 245, 239, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  z-index: 1030;
  transition: background 0.3s ease;
}

.site-header.scrolled {
  background: rgba(247, 245, 239, 0.98);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.navbar-brand {
  display: inline-flex;
  align-items: baseline;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

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

.brand-split {
  color: var(--accent);
  margin-left: 2px;
}

.brand-cn::first-letter {
  font-size: 28px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 20px 0;
  position: relative;
  text-decoration: none;
  transition: color 0.25s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 14px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
}

.nav-links a:hover::after, .nav-links a.active::after {
  transform: scaleX(1);
}

.dropdown-menu {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(15, 35, 34, 0.08);
  padding: 10px 0;
  margin-top: 4px;
  background: var(--card);
  min-width: 180px;
}

.dropdown-item {
  font-size: 14px;
  color: var(--text);
  padding: 8px 20px;
  transition: background 0.2s ease, color 0.2s ease;
}

.dropdown-item:hover, .dropdown-item:focus, .dropdown-item.active {
  background: var(--primary-soft);
  color: var(--primary);
}

.dropdown-toggle::after {
  border-top-color: var(--muted);
  margin-left: 6px;
  vertical-align: middle;
}

.nav-cta {
  height: 38px;
  padding: 0 20px;
  font-size: 14px;
  border-radius: 0;
}

/* ========== 分类页 Hero ========== */
.category-hero {
  position: relative;
  background-color: var(--primary-dark);
  background-image: linear-gradient(100deg, rgba(14, 40, 39, 0.92) 20%, rgba(14, 40, 39, 0.65) 80%), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  padding: 120px 0 80px;
  margin-top: var(--header-h);
  color: #fff;
  overflow: hidden;
}

.category-hero .breadcrumb {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 18px;
  --bs-breadcrumb-divider-color: rgba(255, 255, 255, 0.4);
}

.category-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  transition: color 0.25s ease;
}

.category-hero .breadcrumb a:hover {
  color: var(--accent);
}

.category-hero .breadcrumb-item.active {
  color: rgba(255, 255, 255, 0.9);
}

.category-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5vw, 50px);
  font-weight: 800;
  margin-bottom: 14px;
  color: #fff;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.category-hero .hero-sub {
  font-size: 17px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.8);
  max-width: 580px;
  margin-bottom: 30px;
}

.category-hero .hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.category-hero .btn-ghost-light {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #fff;
  border-radius: 0;
  height: 44px;
  padding: 0 26px;
  font-weight: 600;
  transition: all 0.25s ease;
}

.category-hero .btn-ghost-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
}

/* ========== 概述区 ========== */
.section-overview {
  padding: var(--section-space) 0;
  background: var(--bg);
}

.overview-wrap {
  display: flex;
  gap: 50px;
  align-items: center;
  flex-wrap: wrap;
}

.overview-media {
  flex: 1 1 42%;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  position: relative;
}

.overview-media img {
  width: 100%;
  height: auto;
  min-height: 280px;
  object-fit: cover;
}

.overview-content {
  flex: 1 1 48%;
}

.overview-content .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.overview-content h2 {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 18px;
}

.overview-content p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 14px;
}

.overview-points {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
}

.overview-points li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
}

.overview-points li::before {
  content: "\f00c";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-size: 14px;
}

/* ========== 2×2 卡片矩阵 ========== */
.section-cards-matrix {
  padding: var(--section-space) 0;
  background: var(--card);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-head .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-head p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.matrix-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  height: 100%;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.matrix-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--accent);
  transition: height 0.3s ease;
}

.matrix-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(196, 162, 101, 0.5);
}

.matrix-card:hover::before {
  height: 100%;
}

.matrix-card .card-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-soft);
  border-radius: var(--radius);
  color: var(--primary);
  font-size: 22px;
  margin-bottom: 20px;
  transition: background 0.25s ease, color 0.25s ease;
}

.matrix-card:hover .card-icon {
  background: var(--accent-soft);
  color: var(--accent);
}

.matrix-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.matrix-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 16px;
}

.matrix-card .card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.25s ease, gap 0.25s ease;
}

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

.matrix-card .card-link .fa {
  font-size: 12px;
}

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

.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.accordion-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: var(--radius) !important;
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.25s ease;
}

.accordion-item:has(.accordion-button:not(.collapsed)) {
  border-color: var(--accent);
}

.accordion-button {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  background: var(--card);
  padding: 18px 24px;
  border: none;
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.25s ease, color 0.25s ease;
  position: relative;
}

.accordion-button::after {
  content: "\f067";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 15px;
  color: var(--accent);
  background-image: none;
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  transition: transform 0.3s ease;
}

.accordion-button:not(.collapsed) {
  background: var(--primary-soft);
  color: var(--primary);
}

.accordion-button:not(.collapsed)::after {
  transform: translateY(-50%) rotate(45deg);
}

.accordion-button:focus {
  box-shadow: none;
  outline: 2px solid rgba(196, 162, 101, 0.4);
  outline-offset: 2px;
}

.accordion-body {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
  padding: 16px 24px 22px;
}

.accordion-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ========== CTA ========== */
.section-cta {
  padding: var(--section-space) 0;
  background: var(--primary);
  background-image: linear-gradient(120deg, rgba(14, 40, 39, 0.95) 0%, rgba(26, 59, 58, 0.9) 60%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  color: #fff;
  position: relative;
}

.cta-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.cta-inner h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 28px;
  line-height: 1.7;
}

.cta-inner .btn-cta {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: var(--primary-dark);
  font-weight: 700;
  height: 50px;
  padding: 0 38px;
  font-size: 16px;
  border-radius: 0;
  transition: all 0.25s ease;
}

.cta-inner .btn-cta:hover {
  background: #d4b478;
  border-color: #d4b478;
  color: var(--primary-dark);
  transform: translateY(-2px);
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 70px 0 30px;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 46px;
}

.footer-brand .footer-logo {
  display: inline-flex;
  align-items: baseline;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 16px;
  text-decoration: none;
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
  margin: 0;
}

.footer-col h4 {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col ul li {
  margin-bottom: 12px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col ul a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color 0.25s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ========== 移动端底部 Tab ========== */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--tab-bar-h);
  background: #fff;
  border-top: 1px solid var(--line);
  z-index: 1040;
  align-items: center;
  justify-content: space-around;
}

.mobile-bottom-nav a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--muted);
  text-decoration: none;
  height: 100%;
  gap: 4px;
  transition: color 0.25s ease;
  position: relative;
}

.mobile-bottom-nav a:hover, .mobile-bottom-nav a.active {
  color: var(--primary);
}

.mobile-bottom-nav a .fa {
  font-size: 19px;
  line-height: 1;
}

.mobile-bottom-nav a.active::before {
  content: "";
  position: absolute;
  top: 0;
  left: 25%;
  width: 50%;
  height: 2px;
  background: var(--accent);
}

.mobile-bottom-nav .tab-popup {
  position: absolute;
  bottom: calc(100% + 8px);
  right: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(15, 35, 34, 0.12);
  padding: 8px 0;
  min-width: 170px;
  display: none;
  z-index: 1050;
}

.mobile-bottom-nav .tab-popup.show {
  display: block;
  animation: fadeInUp 0.25s ease;
}

.mobile-bottom-nav .tab-popup a {
  display: block;
  height: auto;
  padding: 10px 18px;
  text-align: left;
  font-size: 14px;
  color: var(--text);
  flex-direction: row;
  gap: 10px;
}

.mobile-bottom-nav .tab-popup a:hover, .mobile-bottom-nav .tab-popup a.active {
  background: var(--primary-soft);
  color: var(--primary);
}

.mobile-bottom-nav .tab-popup a .fa {
  font-size: 14px;
  width: 18px;
  text-align: center;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== 通用工具与动效 ========== */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.page-bottom-padding {
  padding-bottom: 80px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ========== 响应式 ========== */
@media (max-width: 991.98px) {
  .desktop-nav {
    display: none !important;
  }

  .nav-cta {
    display: none !important;
  }

  .site-header {
    height: 58px;
  }

  .main-nav {
    height: 58px;
    justify-content: center;
  }

  .navbar-brand {
    font-size: 22px;
  }

  .mobile-bottom-nav {
    display: flex;
  }

  .category-hero {
    padding: 100px 0 60px;
    margin-top: 58px;
  }

  .category-hero h1 {
    font-size: clamp(30px, 7vw, 42px);
  }

  .overview-wrap {
    flex-direction: column;
    gap: 30px;
  }

  .overview-media {
    flex: 1 1 100%;
    width: 100%;
  }

  .overview-content {
    flex: 1 1 100%;
  }

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

  .site-footer {
    padding-bottom: 80px;
  }

  .page-bottom-padding {
    padding-bottom: 76px;
  }
}

@media (max-width: 767.98px) {
  :root {
    --section-space: 56px;
  }

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

  .category-hero .btn-ghost-light,
  .category-hero .btn-primary {
    width: 100%;
  }

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

  .matrix-card {
    padding: 24px 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

@media (max-width: 575.98px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .category-hero {
    padding: 84px 0 50px;
  }

  .category-hero .breadcrumb {
    font-size: 12px;
  }

  .category-hero h1 {
    font-size: 28px;
  }

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

  .overview-content h2 {
    font-size: 26px;
  }

  .overview-content p {
    font-size: 14px;
  }

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

  .section-head p {
    font-size: 14px;
  }

  .accordion-button {
    font-size: 15px;
    padding: 16px 20px;
    padding-right: 46px;
  }

  .accordion-body {
    font-size: 13px;
  }

  .matrix-card h3 {
    font-size: 18px;
  }

  .matrix-card p {
    font-size: 13px;
  }
}

/* roulang page: category2 */
:root{
  --primary:#1a3b3a;
  --primary-dark:#0e2827;
  --primary-soft:#e8eeed;
  --accent:#c4a265;
  --accent-soft:#f3e8d5;
  --bg:#f7f5ef;
  --card:#ffffff;
  --text:#1b211f;
  --muted:#6b7472;
  --line:#e3ded3;
  --radius-card:4px;
  --radius-badge:2px;
  --shadow-hover:0 8px 24px rgba(15,35,34,.06);
  --transition:all .25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{font-family:"Noto Serif SC","Source Han Serif SC","SimSun",serif;font-weight:700;line-height:1.2;color:var(--text)}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1160px;padding-left:20px;padding-right:20px;margin:0 auto}
section{padding:clamp(64px,8vw,120px) 0;position:relative}

/* 按钮 */
.btn{
  height:44px;padding:0 26px;border:none;border-radius:0;font-size:15px;font-weight:600;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  transition:var(--transition);line-height:1.2;cursor:pointer;white-space:nowrap;
}
.btn:focus{outline:2px solid var(--accent);outline-offset:2px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-outline{background:transparent;border:1px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-lg{height:52px;padding:0 36px;font-size:16px}
.btn:disabled{opacity:.5;pointer-events:none}

/* 徽章 */
.badge-tag{
  display:inline-block;padding:4px 10px;background:var(--primary-soft);color:var(--primary);
  font-size:12px;border-radius:var(--radius-badge);font-weight:500;line-height:1.6;
}

/* 头部 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;height:64px;
  background:rgba(247,245,239,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);transition:var(--transition);
}
.site-header.scrolled{background:rgba(247,245,239,.97);box-shadow:0 2px 16px rgba(15,35,34,.04)}
.main-nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px}
.navbar-brand{display:flex;align-items:center;font-size:22px;font-weight:800;letter-spacing:1px;font-family:"Noto Serif SC",serif;line-height:1;flex-shrink:0}
.navbar-brand .brand-cn{color:var(--primary)}
.navbar-brand .brand-split{color:var(--accent);margin-left:4px}
.nav-links{display:flex;align-items:center;gap:28px;margin:0;padding:0}
.nav-links>li{position:relative}
.nav-links>li>a{
  display:block;font-size:15px;font-weight:500;color:var(--text);padding:8px 2px;
  border-bottom:2px solid transparent;transition:var(--transition);line-height:1.4;
}
.nav-links>li>a:hover,.nav-links>li>a.active{color:var(--primary);border-bottom-color:var(--accent)}
.nav-links .dropdown-menu{
  border-radius:0;border:1px solid var(--line);padding:8px 0;min-width:160px;
  box-shadow:0 8px 24px rgba(15,35,34,.06);background:#fff;margin-top:4px;
}
.nav-links .dropdown-menu .dropdown-item{
  font-size:14px;padding:10px 20px;color:var(--text);transition:var(--transition);
}
.nav-links .dropdown-menu .dropdown-item:hover{background:var(--primary-soft);color:var(--primary)}
.nav-links .dropdown-menu .dropdown-item.active{background:var(--accent-soft);color:var(--primary);font-weight:600}
.nav-cta{flex-shrink:0}
.desktop-nav{display:flex}

/* 移动端底部Tab */
.mobile-bottom-tabs{
  display:none;position:fixed;bottom:0;left:0;right:0;z-index:1050;
  background:#fff;border-top:1px solid var(--line);height:60px;
  align-items:stretch;justify-content:space-around;padding:0;
}
.mobile-bottom-tabs .tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--muted);font-size:11px;gap:2px;transition:var(--transition);padding:6px 0;
}
.mobile-bottom-tabs .tab-item i{font-size:18px}
.mobile-bottom-tabs .tab-item.active,.mobile-bottom-tabs .tab-item:hover{color:var(--primary)}
.mobile-bottom-tabs .tab-item.active i{color:var(--primary)}
.mobile-bottom-tabs .tab-dropup{flex:1;display:flex;flex-direction:column;position:relative}
.mobile-bottom-tabs .tab-dropup .tab-item{width:100%;height:100%}
.mobile-bottom-tabs .tab-dropup .dropdown-menu{
  position:absolute;bottom:64px;left:50%;transform:translateX(-50%);
  background:#fff;border:1px solid var(--line);border-radius:4px;
  box-shadow:0 -8px 24px rgba(15,35,34,.08);padding:8px 0;min-width:140px;margin:0;
}
.mobile-bottom-tabs .tab-dropup .dropdown-menu .dropdown-item{
  font-size:14px;padding:10px 20px;color:var(--text);text-align:center;
}
.mobile-bottom-tabs .tab-dropup .dropdown-menu .dropdown-item:hover{background:var(--primary-soft);color:var(--primary)}
.mobile-bottom-tabs .tab-dropup .dropdown-menu .dropdown-item.active{background:var(--accent-soft);color:var(--primary);font-weight:600}

/* 页脚 */
.site-footer{background:var(--primary-dark);color:rgba(255,255,255,.8);padding:64px 0 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-logo{font-size:22px;font-weight:800;font-family:"Noto Serif SC",serif;color:#fff;display:inline-block;margin-bottom:12px;line-height:1.2}
.footer-logo .brand-split{color:var(--accent)}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.65);line-height:1.75;max-width:280px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px;font-family:"Noto Serif SC",serif}
.footer-col ul li{margin-bottom:10px;font-size:14px;color:rgba(255,255,255,.65)}
.footer-col ul li a{color:rgba(255,255,255,.65);font-size:14px;transition:var(--transition)}
.footer-col ul li a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:13px;color:rgba(255,255,255,.5)}

/* 页面Hero */
.page-hero{
  min-height:300px;display:flex;align-items:center;padding:120px 0 72px;
  background:linear-gradient(rgba(14,40,39,.86),rgba(14,40,39,.86)),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  color:#fff;position:relative;
}
.page-hero .breadcrumb{font-size:13px;color:rgba(255,255,255,.65);margin-bottom:16px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:0}
.page-hero .breadcrumb a{color:rgba(255,255,255,.8)}
.page-hero .breadcrumb a:hover{color:var(--accent)}
.page-hero .breadcrumb .sep{color:rgba(255,255,255,.5)}
.page-hero .breadcrumb .current{color:var(--accent)}
.page-hero h1{
  font-size:clamp(36px,4vw,50px);color:#fff;margin-bottom:12px;font-weight:800;
}
.page-hero .hero-sub{font-size:17px;color:rgba(255,255,255,.8);max-width:560px;line-height:1.6}

/* 步骤流程 */
.steps-section{background:var(--bg);padding:clamp(64px,8vw,120px) 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:56px;gap:32px}
.section-head .sec-label{font-size:13px;letter-spacing:3px;color:var(--accent);font-weight:600;text-transform:uppercase;margin-bottom:8px;display:block}
.section-head h2{font-size:clamp(28px,3vw,36px);margin-bottom:0;font-weight:800}
.section-head .sec-desc{max-width:420px;font-size:14px;color:var(--muted);line-height:1.7}
.steps-timeline{position:relative;max-width:1100px;margin:0 auto}
.steps-timeline::before{
  content:'';position:absolute;left:56px;top:20px;bottom:20px;width:2px;
  background:linear-gradient(to bottom,var(--accent),var(--line) 30%);
}
.step-item{
  position:relative;padding-left:140px;margin-bottom:64px;
}
.step-item:last-child{margin-bottom:0}
.step-number{
  position:absolute;left:0;top:0;width:112px;text-align:center;
}
.step-number .num{
  display:block;font-family:"Noto Serif SC",serif;font-size:56px;font-weight:800;
  color:var(--accent);line-height:1;margin-bottom:4px;
}
.step-number .num-label{font-size:12px;letter-spacing:2px;color:var(--muted)}
.step-inner{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius-card);padding:32px;transition:var(--transition);
}
.step-item:hover .step-inner{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:var(--accent)}
.step-media{overflow:hidden;border-radius:2px;background:var(--primary-soft);min-height:220px;display:flex;align-items:center;justify-content:center}
.step-media img{width:100%;height:220px;object-fit:cover;transition:transform .5s ease}
.step-item:hover .step-media img{transform:scale(1.03)}
.step-content h3{font-size:24px;margin-bottom:12px;font-weight:700;color:var(--primary)}
.step-content p{font-size:15px;color:var(--muted);line-height:1.8}
.step-content .step-tags{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}
.step-item:nth-child(even) .step-inner .step-media{order:2}
.step-item:nth-child(even) .step-inner .step-content{order:1}
.step-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);margin-top:14px;transition:var(--transition)}
.step-link:hover{color:var(--accent);gap:10px}

/* 安全特性 */
.secure-features{background:var(--primary-dark);color:#fff;padding:clamp(64px,8vw,120px) 0}
.secure-features .section-head h2{color:#fff}
.secure-features .sec-desc{color:rgba(255,255,255,.6)}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;max-width:1000px;margin:0 auto}
.feature-item{
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-card);
  padding:36px 28px;transition:var(--transition);position:relative;overflow:hidden;
}
.feature-item::before{
  content:'';position:absolute;top:0;left:0;width:38px;height:3px;background:var(--accent);transition:var(--transition);
}
.feature-item:hover{background:rgba(255,255,255,.08);transform:translateY(-4px)}
.feature-item:hover::before{width:64px}
.feature-item i{font-size:32px;color:var(--accent);margin-bottom:18px;display:block}
.feature-item h3{font-size:18px;color:#fff;margin-bottom:10px;font-weight:700}
.feature-item p{font-size:14px;color:rgba(255,255,255,.6);line-height:1.7}
.feature-item .feature-num{
  position:absolute;top:18px;right:18px;font-family:"Noto Serif SC",serif;font-size:36px;font-weight:800;color:rgba(255,255,255,.08);
}

/* FAQ */
.faq-section{background:var(--bg);padding:clamp(64px,8vw,120px) 0}
.faq-wrap{max-width:860px;margin:0 auto}
.accordion-item{
  background:var(--card);border:1px solid var(--line) !important;border-radius:var(--radius-card) !important;
  margin-bottom:16px;overflow:hidden;
}
.accordion-button{
  background:transparent;border:none;box-shadow:none;font-size:16px;font-weight:600;color:var(--text);
  padding:20px 24px;position:relative;transition:var(--transition);
}
.accordion-button::after{
  content:'+';font-family:var(--font-sans);font-size:24px;font-weight:300;color:var(--primary);
  background:none;width:auto;height:auto;transition:var(--transition);transform:none;
}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);color:var(--accent)}
.accordion-button:not(.collapsed){background:var(--primary-soft);color:var(--primary);box-shadow:none}
.accordion-button:focus{box-shadow:none;border-color:transparent;outline:2px solid var(--accent);outline-offset:-2px}
.accordion-button:hover{background:var(--primary-soft);color:var(--primary)}
.accordion-body{padding:0 24px 20px;font-size:14px;color:var(--muted);line-height:1.75;background:var(--card)}

/* CTA表单 */
.contact-cta{background:var(--primary);padding:clamp(64px,8vw,100px) 0;color:#fff;position:relative;overflow:hidden}
.contact-cta::before{
  content:'';position:absolute;right:-120px;top:-120px;width:400px;height:400px;
  border:2px solid rgba(255,255,255,.06);border-radius:50%;
}
.contact-cta::after{
  content:'';position:absolute;right:40px;top:40px;width:200px;height:200px;
  border:1px solid rgba(255,255,255,.04);border-radius:50%;
}
.contact-cta .cta-inner{position:relative;z-index:2}
.contact-cta h2{color:#fff;font-size:clamp(28px,3vw,38px);margin-bottom:14px}
.contact-cta .cta-desc{color:rgba(255,255,255,.75);font-size:15px;max-width:380px;margin-bottom:32px;line-height:1.7}
.contact-cta .contact-list{margin-bottom:36px}
.contact-cta .contact-list li{display:flex;align-items:center;gap:12px;font-size:14px;color:rgba(255,255,255,.8);margin-bottom:14px}
.contact-cta .contact-list li i{width:36px;height:36px;background:rgba(255,255,255,.1);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--accent);font-size:14px;flex-shrink:0}
.cta-form{background:#fff;border-radius:4px;padding:36px;color:var(--text)}
.cta-form h3{font-size:20px;margin-bottom:8px;color:var(--text)}
.cta-form .form-tip{font-size:13px;color:var(--muted);margin-bottom:24px}
.form-control-custom{position:relative;margin-bottom:22px}
.form-control-custom label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
.form-control-custom label .req{color:var(--accent);margin-left:2px}
.form-control-custom input,.form-control-custom textarea{
  width:100%;border:none;border-bottom:1px solid var(--line);background:transparent;
  font-size:15px;color:var(--text);padding:10px 2px;transition:var(--transition);border-radius:0;line-height:1.5;
}
.form-control-custom input:focus,.form-control-custom textarea:focus{
  outline:none;border-bottom-color:var(--primary);box-shadow:none;
}
.form-control-custom textarea{min-height:120px;resize:vertical}
.form-control-custom .focus-line{
  position:absolute;bottom:0;left:0;width:100%;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.form-control-custom input:focus~.focus-line,.form-control-custom textarea:focus~.focus-line{transform:scaleX(1)}
.form-success{
  display:none;background:var(--primary-soft);border:1px solid var(--primary);color:var(--primary);
  padding:16px 20px;border-radius:4px;font-size:14px;margin-top:16px;
}
.form-success.show{display:block}

/* 响应式 */
@media (max-width:991px){
  .desktop-nav{display:none}
  .mobile-bottom-tabs{display:flex}
  .site-header{padding-bottom:0}
  .nav-cta{display:none}
  body{padding-bottom:60px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .page-hero{min-height:260px;padding:110px 0 56px}
  .section-head{flex-direction:column;gap:12px;margin-bottom:40px}
  .steps-timeline::before{left:28px}
  .step-item{padding-left:64px;margin-bottom:48px}
  .step-number{width:56px}
  .step-number .num{font-size:36px}
  .step-number .num-label{font-size:11px}
  .step-inner{grid-template-columns:1fr;padding:20px}
  .step-item:nth-child(even) .step-inner .step-media{order:0}
  .step-item:nth-child(even) .step-inner .step-content{order:0}
  .step-media img{height:180px}
  .feature-grid{grid-template-columns:1fr;gap:20px;max-width:480px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
  .cta-form{padding:24px}
}
@media (max-width:520px){
  .container{padding-left:16px;padding-right:16px}
  .btn{height:40px;padding:0 20px;font-size:14px}
  .page-hero h1{font-size:32px}
  .hero-sub{font-size:15px}
  .step-inner{padding:16px;gap:16px}
  .step-content h3{font-size:20px}
  .step-content p{font-size:14px}
  .feature-item{padding:24px 20px}
  .cta-form{padding:20px}
}

/* 动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}