/* roulang page: index */
:root {
  --c-primary: #1A1A18;
  --c-accent: #B8935C;
  --c-accent-hover: #C7A36E;
  --c-bg: #F6F4EF;
  --c-bg-alt: #ECE9E2;
  --c-card: #FFFFFF;
  --c-text: #26241F;
  --c-text-alt: #6E6A61;
  --c-border: #E2DED5;
  --c-dark-text: #F2EFE9;
  --c-dark-text-alt: #B8B2A6;
  --radius-card: 12px;
  --radius-media: 8px;
  --radius-btn: 999px;
  --shadow-sm: 0 8px 24px rgba(30, 20, 0, 0.06);
  --shadow-lg: 0 16px 40px rgba(30, 20, 0, 0.10);
  --transition: all .25s ease;
  --container: 1200px;
  --font-cn: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-en: Inter, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background-color: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: none;
  background: none;
  outline: none;
}

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

.grid-container {
  max-width: var(--container);
}

/* Nav */
.site-nav {
  position: fixed;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 1200px;
  z-index: 1000;
  transition: var(--transition);
}

.site-nav.scrolled {
  top: 6px;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  padding: 0 18px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 999px;
  box-shadow: 0 4px 20px rgba(30, 20, 0, 0.08);
  transition: var(--transition);
}

.site-nav.scrolled .nav-inner {
  height: 52px;
  box-shadow: 0 8px 28px rgba(30, 20, 0, 0.12);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 2px;
  flex-shrink: 0;
}

.brand-logo {
  font-family: var(--font-en);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--c-primary);
  text-transform: lowercase;
}

.brand-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-alt);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-light .brand-logo {
  color: var(--c-dark-text);
}

.brand-light .brand-text {
  color: var(--c-dark-text-alt);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text);
  border-radius: 999px;
  position: relative;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--c-accent);
  background: rgba(184, 147, 92, 0.15);
}

.nav-link.active {
  background: rgba(184, 147, 92, 0.15);
  color: var(--c-primary);
  font-weight: 600;
}

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: rgba(184, 147, 92, 0.1);
  border: 1px solid var(--c-border);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.2;
  white-space: nowrap;
}

.btn-primary {
  background: var(--c-primary);
  color: var(--c-dark-text);
  border: 1px solid var(--c-primary);
}

.btn-primary:hover {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-accent {
  background: var(--c-accent);
  color: #fff;
  border: 1px solid var(--c-accent);
}

.btn-accent:hover {
  background: var(--c-accent-hover);
  border-color: var(--c-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border: 1px solid var(--c-primary);
}

.btn-outline:hover {
  background: var(--c-bg-alt);
  color: var(--c-primary);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: var(--c-dark-text);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.btn-nav {
  padding: 10px 22px;
  font-size: 14px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  background-color: var(--c-primary);
  overflow: hidden;
  color: var(--c-dark-text);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(16, 16, 14, 0.45);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 120px 0 60px;
}

.hero-copy {
  opacity: 0;
  animation: heroFadeUp 0.8s ease forwards;
}

@keyframes heroFadeUp {
  0% { opacity: 0; transform: translateY(24px); }
  100% { opacity: 1; transform: translateY(0); }
}

.hero-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  background: rgba(184, 147, 92, 0.14);
  border: 1px solid rgba(184, 147, 92, 0.25);
  border-radius: 999px;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: 44px;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 16px;
}

.hero h1 span {
  display: block;
  font-size: 30px;
  font-weight: 500;
  color: var(--c-dark-text-alt);
  margin-top: 6px;
}

.hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: var(--c-dark-text-alt);
  max-width: 440px;
  margin-bottom: 32px;
}

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

.hero-visual {
  opacity: 0;
  animation: heroFadeUp 0.8s ease 0.2s forwards;
}

.hero-card {
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 20px;
  padding: 26px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.18);
}

.hero-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-dark-text);
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 14px;
}

.hero-card-dot {
  width: 8px;
  height: 8px;
  background: var(--c-accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.hero-card-list li {
  margin-bottom: 4px;
}

.hero-card-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 10px;
  font-size: 14px;
  color: var(--c-dark-text-alt);
  border-radius: 10px;
  transition: var(--transition);
}

.hero-card-list a::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  border-radius: 50%;
  opacity: 0.7;
  flex-shrink: 0;
}

.hero-card-list a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--c-dark-text);
  padding-left: 14px;
}

/* Trust bar */
.trust-bar {
  background: var(--c-card);
  border-bottom: 1px solid var(--c-border);
  padding: 22px 0;
}

.trust-bar .grid-x {
  align-items: stretch;
}

.trust-item {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  padding: 12px 8px;
  text-align: center;
  position: relative;
}

.trust-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 32px;
  background: var(--c-border);
}

.trust-num {
  font-family: var(--font-en);
  font-size: 26px;
  font-weight: 700;
  color: var(--c-accent);
  font-feature-settings: "tnum";
  line-height: 1;
}

.trust-plus {
  font-family: var(--font-en);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-primary);
}

.trust-label {
  flex-basis: 100%;
  font-size: 13px;
  color: var(--c-text-alt);
  margin-top: 4px;
}

/* Section */
.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head .section-index,
.section-head-news .section-index {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--c-accent);
  margin-bottom: 8px;
}

.section-head h2,
.section-head-news h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-primary);
  line-height: 1.3;
  margin-bottom: 8px;
}

.section-head p,
.section-head-news p {
  font-size: 16px;
  color: var(--c-text-alt);
  max-width: 420px;
  margin: 0 auto;
}

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

/* Steps */
.steps {
  padding: 100px 0;
  background: var(--c-bg);
}

.steps-track {
  position: relative;
}

.steps-line {
  position: absolute;
  top: 44px;
  left: 100px;
  right: 100px;
  height: 1px;
  background: var(--c-border);
  z-index: 0;
}

.step-item {
  position: relative;
  text-align: center;
  padding: 0 20px;
  z-index: 1;
}

.step-num {
  width: 88px;
  height: 88px;
  margin: 0 auto 24px;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 700;
  color: var(--c-accent);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.step-num::after {
  content: "";
  position: absolute;
  right: -34px;
  width: 24px;
  height: 1px;
  background: var(--c-border);
}

.step-item:last-child .step-num::after {
  display: none;
}

.step-item h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--c-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.step-item p {
  font-size: 14px;
  color: var(--c-text-alt);
  line-height: 1.7;
  max-width: 280px;
  margin: 0 auto;
}

/* Cases */
.cases {
  padding: 100px 0;
  background: var(--c-card);
}

.case-row {
  margin-bottom: 80px;
}

.case-row:last-child {
  margin-bottom: 0;
}

.case-media {
  border-radius: var(--radius-media);
  overflow: hidden;
  background: #E9E4DB;
  box-shadow: var(--shadow-sm);
}

.case-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

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

.case-content .tag {
  margin-bottom: 14px;
}

.case-content h3 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-primary);
  margin-bottom: 12px;
}

.case-desc {
  font-size: 15px;
  color: var(--c-text-alt);
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 400px;
}

.case-stat {
  display: inline-block;
  padding: 12px 20px;
  background: var(--c-bg-alt);
  border-left: 3px solid var(--c-accent);
  border-radius: 8px;
  font-size: 14px;
  color: var(--c-text);
}

.case-stat strong {
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-accent);
  font-feature-settings: "tnum";
  margin-right: 4px;
}

/* Tag */
.tag {
  display: inline-block;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--c-accent);
  background: rgba(184, 147, 92, 0.12);
  border: 1px solid rgba(184, 147, 92, 0.2);
  border-radius: 999px;
  letter-spacing: 0.02em;
}

/* FAQ */
.faq {
  padding: 100px 0;
  background: var(--c-bg-alt);
}

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

.faq-list .accordion-item {
  background: transparent;
  border-bottom: 1px solid var(--c-border);
}

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

.faq-list .accordion-title {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 30px 22px 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--c-primary);
  background: transparent;
  border: none;
  outline: none;
  transition: var(--transition);
}

.faq-list .accordion-title:hover {
  color: var(--c-accent);
}

.faq-list .accordion-title .faq-icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: var(--transition);
}

.faq-list .accordion-title .faq-icon::before,
.faq-list .accordion-title .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--c-accent);
  border-radius: 2px;
  transition: var(--transition);
}

.faq-list .accordion-title .faq-icon::before {
  top: 8px;
  left: 0;
  width: 18px;
  height: 2px;
}

.faq-list .accordion-title .faq-icon::after {
  top: 1px;
  left: 8px;
  width: 2px;
  height: 18px;
}

.faq-list .accordion-item.is-active .faq-icon {
  transform: rotate(45deg);
}

.faq-list .accordion-content {
  background: transparent;
  padding: 0 30px 22px 0;
  border: none;
}

.faq-list .accordion-content p {
  font-size: 15px;
  color: var(--c-text-alt);
  line-height: 1.8;
  max-width: 640px;
}

/* CTA */
.cta {
  position: relative;
  padding: 100px 0;
  background-color: var(--c-primary);
  color: var(--c-dark-text);
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
}

.cta-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(26, 26, 24, 0.88) 0%, rgba(26, 26, 24, 0.72) 100%);
}

.cta .grid-container {
  position: relative;
  z-index: 1;
}

.cta-copy h2 {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  color: #fff;
}

.cta-copy p {
  font-size: 16px;
  color: var(--c-dark-text-alt);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 400px;
}

.cta-form-wrap {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-card);
  padding: 32px;
  backdrop-filter: blur(8px);
}

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

.cta-form input,
.cta-form textarea {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid #D8D2C8;
  border-radius: 8px;
  color: var(--c-text);
  font-size: 14px;
  transition: var(--transition);
  margin-bottom: 0;
}

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

.cta-form input:focus,
.cta-form textarea:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(184, 147, 92, 0.18);
  background: #fff;
}

.cta-form input::placeholder,
.cta-form textarea::placeholder {
  color: #a09a90;
}

.cta-form .grid-margin-x > .cell {
  margin-bottom: 16px;
}

.cta-form .cell:last-child {
  margin-bottom: 0;
}

.form-note {
  font-size: 12px;
  color: var(--c-dark-text-alt);
  margin-top: 10px;
  text-align: center;
}

/* News */
.news {
  padding: 100px 0;
  background: var(--c-bg);
}

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

.section-head-news p {
  margin-left: 0;
  margin-bottom: 0;
}

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

.news-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-card);
  padding: 24px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.news-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--c-accent);
  transform: scaleY(0);
  transform-origin: center;
  transition: var(--transition);
}

.news-card:hover {
  background: #FAF8F3;
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.news-card:hover::before {
  transform: scaleY(1);
}

.news-card-main .tag {
  margin-bottom: 10px;
}

.news-card-main h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.news-card-main h3 a:hover {
  color: var(--c-accent);
}

.news-card-main p {
  font-size: 14px;
  color: var(--c-text-alt);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-side {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.news-card-side time {
  font-family: var(--font-en);
  font-size: 13px;
  color: var(--c-text-alt);
  font-feature-settings: "tnum";
}

.read-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary);
  padding: 8px 16px;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  transition: var(--transition);
}

.read-more:hover {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
}

.news-empty {
  background: var(--c-card);
  border: 1px dashed var(--c-border);
  border-radius: var(--radius-card);
  padding: 60px 30px;
  text-align: center;
}

.news-empty-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--c-bg-alt);
  position: relative;
}

.news-empty-icon::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 14px;
  width: 16px;
  height: 2px;
  background: var(--c-accent);
  border-radius: 2px;
  box-shadow: 0 5px 0 var(--c-bg-alt), 0 5px 0 var(--c-accent);
}

.news-empty p {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-primary);
  margin-bottom: 4px;
}

.news-empty span {
  font-size: 13px;
  color: var(--c-text-alt);
}

/* Footer */
.site-footer {
  background: #21201D;
  color: var(--c-dark-text-alt);
  padding: 60px 0 0;
}

.footer-brand {
  margin-bottom: 24px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-top: 18px;
  max-width: 340px;
}

.site-footer h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-dark-text);
  margin-bottom: 16px;
}

.site-footer ul li {
  margin-bottom: 8px;
}

.site-footer ul a {
  font-size: 14px;
  color: var(--c-dark-text-alt);
  transition: var(--transition);
}

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

.footer-bottom {
  margin-top: 40px;
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 20px;
  font-size: 13px;
  color: #8C877E;
}

.footer-bottom p {
  margin: 0;
}

/* Responsive */
@media (max-width: 1024px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: #fff;
    border-radius: 18px;
    box-shadow: var(--shadow-lg);
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    display: none;
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-link {
    padding: 12px 16px;
    font-size: 15px;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 8px;
  }

  .btn-nav {
    width: 100%;
  }

  .hero {
    padding-top: 80px;
  }

  .hero-inner {
    padding-top: 80px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero h1 span {
    font-size: 24px;
  }

  .steps-line {
    display: none;
  }

  .step-num::after {
    display: none;
  }

  .step-item {
    margin-bottom: 40px;
  }

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

  .case-content {
    padding: 24px 8px;
  }

  .news-card-side {
    justify-content: flex-start;
    padding-top: 8px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .site-nav {
    width: calc(100% - 24px);
    top: 8px;
  }

  .nav-inner {
    height: 54px;
    padding: 0 12px;
  }

  .site-nav.scrolled .nav-inner {
    height: 48px;
  }

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

  .brand-text {
    font-size: 12px;
  }

  .hero {
    min-height: 600px;
  }

  .hero-inner {
    padding: 100px 0 40px;
  }

  .hero h1 {
    font-size: 30px;
    line-height: 1.2;
  }

  .hero h1 span {
    font-size: 20px;
    margin-top: 8px;
  }

  .hero-sub {
    font-size: 15px;
    margin-bottom: 24px;
  }

  .hero-actions .btn {
    width: 100%;
    padding: 13px 20px;
  }

  .hero-card {
    padding: 18px;
    margin-top: 12px;
  }

  .trust-bar {
    padding: 8px 0;
  }

  .trust-item::after {
    display: none;
  }

  .trust-item {
    padding: 12px 4px;
  }

  .trust-num {
    font-size: 22px;
  }

  .trust-label {
    font-size: 12px;
  }

  .steps,
  .cases,
  .faq,
  .cta,
  .news {
    padding: 64px 0;
  }

  .section-head {
    margin-bottom: 36px;
  }

  .section-head h2,
  .section-head-news h2 {
    font-size: 24px;
  }

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

  .step-item {
    text-align: left;
    padding-left: 24px;
    position: relative;
    margin-bottom: 28px;
  }

  .step-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 44px;
    bottom: -28px;
    width: 1px;
    background: var(--c-border);
  }

  .step-item:last-child::before {
    display: none;
  }

  .step-num {
    width: 56px;
    height: 56px;
    margin: 0 0 14px;
    border-radius: 18px;
    font-size: 20px;
  }

  .step-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
  }

  .step-item p {
    font-size: 14px;
    margin: 0;
  }

  .case-row {
    margin-bottom: 56px;
  }

  .case-content {
    padding: 16px 4px 0;
  }

  .case-content h3 {
    font-size: 21px;
  }

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

  .cta-form-wrap {
    padding: 24px 18px;
  }

  .cta-copy h2 {
    font-size: 26px;
  }

  .cta-copy p {
    font-size: 15px;
  }

  .faq-list .accordion-title {
    font-size: 16px;
    padding: 18px 24px 18px 0;
  }

  .faq-list .accordion-content {
    padding: 0 18px 18px 0;
  }

  .news-card {
    padding: 20px;
  }

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

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

  .news-card-side {
    flex-wrap: wrap;
    gap: 10px;
  }

  .section-head-news {
    margin-bottom: 24px;
  }

  .section-head-news .btn {
    margin-top: 12px;
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    font-size: 12px;
  }

  .site-footer h4 {
    font-size: 14px;
  }

  .site-footer ul a {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* roulang page: category1 */
/* =========================================================
   设计变量
========================================================= */
:root {
  --ink: #1A1A18;
  --copper: #B8935C;
  --copper-light: #C9A976;
  --copper-dark: #977A47;
  --warm-white: #F6F4EF;
  --warm-gray: #ECE9E2;
  --card-white: #FFFFFF;
  --text-main: #26241F;
  --text-muted: #6E6A61;
  --border-line: #E2DED5;
  --success: #2E7D5B;
  --error: #B44335;
  --deep-text: #F2EFE9;
  --deep-muted: #B8B2A6;
  --radius-card: 12px;
  --radius-img: 8px;
  --radius-pill: 999px;
  --shadow: 0 8px 24px rgba(30, 20, 0, 0.06);
  --shadow-hover: 0 16px 40px rgba(30, 20, 0, 0.10);
  --font-cn: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-num: "Inter", "Helvetica Neue", Arial, sans-serif;
  --transition: all .25s ease;
  --nav-height: 60px;
}

/* =========================================================
   Reset / Base
========================================================= */
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-cn);
  background: var(--warm-white);
  color: var(--text-main);
  line-height: 1.7;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "tnum";
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
input, textarea, button {
  font-family: inherit;
  font-size: 15px;
}
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--text-main);
}
p {
  margin: 0 0 16px;
}
::selection {
  background: rgba(184, 147, 92, 0.25);
}

/* =========================================================
   容器 / Foundation 覆盖
========================================================= */
.grid-container {
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
}
.grid-margin-x > .cell {
  margin-bottom: 24px;
}
.grid-margin-x > .cell:last-child {
  margin-bottom: 0;
}
@media (max-width: 639px) {
  .grid-margin-x > .cell {
    margin-bottom: 20px;
  }
}

/* =========================================================
   悬浮胶囊导航
========================================================= */
.site-nav {
  position: fixed;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 1200px;
  z-index: 999;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(226, 222, 213, 0.7);
  box-shadow: 0 4px 20px rgba(30, 20, 0, 0.06);
  transition: box-shadow .2s ease, top .25s ease;
}
.site-nav.nav-scrolled {
  box-shadow: 0 8px 30px rgba(30, 20, 0, 0.10);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  padding: 0 8px 0 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.brand-logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
  background: var(--warm-gray);
  padding: 6px 14px;
  border-radius: 10px;
  line-height: 1;
}
.brand-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
}
.brand-light .brand-logo {
  background: rgba(255, 255, 255, 0.08);
  color: var(--deep-text);
}
.brand-light .brand-text {
  color: var(--deep-text);
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
  position: relative;
}
.nav-link:hover {
  color: var(--copper-dark);
  background: rgba(184, 147, 92, 0.12);
}
.nav-link.active {
  background: rgba(184, 147, 92, 0.15);
  color: var(--copper-dark);
  font-weight: 600;
}
.nav-cta {
  margin-left: 10px;
}
.btn-nav {
  padding: 10px 22px;
  font-size: 14px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
  border-radius: 50%;
  transition: var(--transition);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  margin: 0 auto;
  transition: var(--transition);
}
.nav-toggle:hover span {
  background: var(--copper);
}
@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }
  .nav-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--border-line);
    box-shadow: var(--shadow-hover);
    display: none;
    margin-left: 0;
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
    justify-content: center;
  }
  .nav-cta {
    margin-left: 0;
    margin-top: 8px;
    justify-content: center;
  }
}
@media (max-width: 520px) {
  .brand-text {
    font-size: 13px;
  }
  .brand-logo {
    font-size: 18px;
    padding: 5px 10px;
  }
  .site-nav {
    top: 8px;
    width: calc(100% - 24px);
  }
  .nav-inner {
    padding-left: 16px;
  }
}

/* =========================================================
   按钮系统
========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  line-height: 1.4;
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink);
  color: #fff;
}
.btn-primary:hover {
  background: var(--copper-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-accent {
  background: var(--copper);
  color: #fff;
}
.btn-accent:hover {
  background: var(--copper-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-outline {
  background: transparent;
  border-color: var(--copper);
  color: var(--copper-dark);
}
.btn-outline:hover {
  background: rgba(184, 147, 92, 0.10);
  transform: translateY(-2px);
}
.btn-block {
  width: 100%;
}
.btn:focus-visible {
  outline: 3px solid rgba(184, 147, 92, 0.4);
  outline-offset: 2px;
}
@media (max-width: 520px) {
  .btn {
    padding: 12px 24px;
    font-size: 14px;
  }
}

/* =========================================================
   Hero 分类横幅
========================================================= */
.channel-hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 140px 0 100px;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  background-color: var(--ink);
}
.channel-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(16, 16, 14, 0.45);
  z-index: 1;
}
.channel-hero .grid-container {
  position: relative;
  z-index: 2;
  width: 100%;
}
.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--deep-muted);
  margin-bottom: 20px;
}
.hero-breadcrumb a {
  color: rgba(242, 239, 233, 0.7);
}
.hero-breadcrumb a:hover {
  color: var(--copper-light);
}
.hero-breadcrumb .sep {
  color: rgba(242, 239, 233, 0.35);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--deep-text);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.15;
  color: var(--deep-text);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 620px;
}
.hero-title .accent {
  color: var(--copper-light);
}
.hero-desc {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(242, 239, 233, 0.85);
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-card {
  background: rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}
.hero-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #E9E4DB;
}
.hero-card-body {
  padding: 24px 28px;
}
.hero-card-body h3 {
  color: var(--deep-text);
  font-size: 20px;
  margin-bottom: 8px;
}
.hero-card-body p {
  color: rgba(242, 239, 233, 0.75);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 0;
}
.hero-card-body .hero-metric {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 14px;
}
.hero-card-body .metric-num {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 700;
  color: var(--copper-light);
}
.hero-card-body .metric-label {
  font-size: 13px;
  color: rgba(242, 239, 233, 0.6);
}
@media (max-width: 1023px) {
  .channel-hero {
    padding: 130px 0 80px;
    min-height: auto;
  }
  .hero-title {
    font-size: 34px;
  }
  .hero-card {
    margin-top: 32px;
  }
}
@media (max-width: 639px) {
  .channel-hero {
    padding: 110px 0 60px;
  }
  .hero-title {
    font-size: 30px;
  }
  .hero-desc {
    font-size: 15px;
  }
}

/* =========================================================
   通用板块
========================================================= */
.section {
  padding: 96px 0;
}
@media (max-width: 639px) {
  .section {
    padding: 56px 0;
  }
}
.section-head {
  max-width: 720px;
  margin-bottom: 56px;
}
.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--copper-dark);
  background: rgba(184, 147, 92, 0.12);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-head h2 {
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 600px;
}
.section-head.center p {
  margin-left: auto;
  margin-right: auto;
}
@media (max-width: 639px) {
  .section-head {
    margin-bottom: 36px;
  }
  .section-head h2 {
    font-size: 24px;
  }
}

/* =========================================================
   内容索引区（合作概览）
========================================================= */
.overview-section {
  background: var(--warm-white);
  padding: 100px 0;
}
@media (max-width: 639px) {
  .overview-section {
    padding: 60px 0;
  }
}
.overview-media {
  border-radius: var(--radius-img);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.overview-media img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  background: #E9E4DB;
}
.overview-content .check-list {
  margin-top: 24px;
}
.overview-content .check-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 14px;
  font-size: 16px;
  color: var(--text-main);
}
.overview-content .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--copper);
  border: 2px solid var(--warm-white);
  box-shadow: 0 0 0 2px rgba(184, 147, 92, 0.3);
}
.narrow-cards {
  margin-top: 64px;
}
.narrow-card {
  background: var(--card-white);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-card);
  padding: 40px 36px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 100%;
}
.narrow-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.narrow-card h3 {
  font-size: 20px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.narrow-card h3::before {
  content: "";
  width: 4px;
  height: 20px;
  border-radius: 4px;
  background: var(--copper);
  display: block;
}
.narrow-card ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}
.narrow-card ul li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--copper);
  font-weight: 700;
}
@media (max-width: 639px) {
  .narrow-cards {
    margin-top: 36px;
  }
  .narrow-card {
    padding: 28px 24px;
  }
}

/* =========================================================
   渠道权益区
========================================================= */
.benefits-section {
  background: var(--warm-gray);
  padding: 100px 0;
}
@media (max-width: 639px) {
  .benefits-section {
    padding: 60px 0;
  }
}
.benefit-row {
  background: var(--card-white);
  border-radius: var(--radius-card);
  border: 1px solid var(--border-line);
  padding: 36px 32px;
  display: flex;
  gap: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 100%;
}
.benefit-row:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.benefit-num {
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 700;
  color: var(--copper);
  line-height: 1;
  min-width: 48px;
  font-feature-settings: "tnum";
}
.benefit-content h3 {
  font-size: 20px;
  margin-bottom: 8px;
}
.benefit-content p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 0;
}
@media (max-width: 639px) {
  .benefit-row {
    padding: 28px 24px;
    flex-direction: column;
    gap: 14px;
  }
}

/* =========================================================
   合作流程区
========================================================= */
.process-section {
  background: var(--warm-white);
  padding: 100px 0;
}
@media (max-width: 639px) {
  .process-section {
    padding: 60px 0;
  }
}
.process-steps {
  display: flex;
  gap: 0;
  position: relative;
}
.process-steps::before {
  content: "";
  position: absolute;
  top: 32px;
  left: 8%;
  right: 8%;
  height: 1px;
  background: var(--border-line);
  z-index: 0;
}
.step {
  position: relative;
  z-index: 1;
  flex: 1;
  text-align: center;
  padding: 0 24px;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--warm-white);
  border: 2px solid var(--copper);
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  color: var(--copper-dark);
  margin-bottom: 20px;
  box-shadow: 0 0 0 8px rgba(184, 147, 92, 0.10);
}
.step h3 {
  font-size: 20px;
  margin-bottom: 10px;
}
.step p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 0;
}
@media (max-width: 1023px) {
  .process-steps {
    flex-direction: column;
    gap: 32px;
    padding-left: 80px;
  }
  .process-steps::before {
    top: 0;
    bottom: 0;
    left: 32px;
    right: auto;
    width: 1px;
    height: auto;
  }
  .step {
    text-align: left;
    padding: 0;
    display: flex;
    align-items: flex-start;
    gap: 20px;
  }
  .step-num {
    margin-bottom: 0;
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    font-size: 18px;
  }
  .step h3 {
    margin-bottom: 6px;
  }
}
@media (max-width: 639px) {
  .process-steps {
    padding-left: 60px;
  }
  .process-steps::before {
    left: 26px;
  }
  .step-num {
    width: 48px;
    height: 48px;
    font-size: 16px;
  }
}

/* =========================================================
   FAQ 区
========================================================= */
.faq-section {
  background: var(--warm-gray);
  padding: 100px 0;
}
@media (max-width: 639px) {
  .faq-section {
    padding: 60px 0;
  }
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid rgba(226, 222, 213, 0.7);
}
.faq-item:first-child {
  border-top: 1px solid rgba(226, 222, 213, 0.7);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 26px 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  gap: 20px;
  transition: var(--transition);
}
.faq-question:hover {
  color: var(--copper-dark);
}
.faq-icon {
  font-size: 28px;
  font-weight: 300;
  color: var(--copper);
  line-height: 1;
  transition: transform .3s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-answer p {
  padding: 0 40px 24px 8px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}
@media (max-width: 639px) {
  .faq-question {
    font-size: 16px;
    padding: 20px 4px;
  }
  .faq-answer p {
    padding-right: 24px;
  }
}

/* =========================================================
   CTA 区
========================================================= */
.cta-section {
  background: var(--ink);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
  z-index: 0;
}
.cta-section .grid-container {
  position: relative;
  z-index: 1;
}
.cta-inner {
  display: flex;
  gap: 64px;
  align-items: center;
}
.cta-left {
  flex: 0 0 42%;
}
.cta-left h2 {
  color: var(--deep-text);
  font-size: clamp(26px, 3vw, 36px);
  margin-bottom: 16px;
}
.cta-left p {
  color: rgba(242, 239, 233, 0.75);
  font-size: 16px;
  margin-bottom: 32px;
}
.cta-right {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 16px;
  padding: 40px 44px;
}
.coop-form label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: rgba(242, 239, 233, 0.8);
  margin-bottom: 6px;
}
.coop-form input,
.coop-form textarea {
  width: 100%;
  height: 48px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 0 16px;
  color: var(--deep-text);
  font-size: 15px;
  margin-bottom: 18px;
  transition: var(--transition);
}
.coop-form input::placeholder,
.coop-form textarea::placeholder {
  color: rgba(242, 239, 233, 0.35);
}
.coop-form input:focus,
.coop-form textarea:focus {
  outline: none;
  border-color: var(--copper);
  box-shadow: 0 0 0 3px rgba(184, 147, 92, 0.15);
  background: rgba(255, 255, 255, 0.12);
}
.coop-form textarea {
  height: 96px;
  padding: 14px 16px;
  resize: vertical;
  min-height: 80px;
}
.coop-form .btn {
  margin-top: 8px;
}
.form-note {
  font-size: 12px;
  color: rgba(242, 239, 233, 0.45);
  margin-top: 14px;
  text-align: center;
}
@media (max-width: 1023px) {
  .cta-inner {
    flex-direction: column;
    gap: 40px;
  }
  .cta-left {
    flex: none;
    text-align: center;
  }
  .cta-left p {
    margin-left: auto;
    margin-right: auto;
    max-width: 480px;
  }
  .cta-right {
    width: 100%;
  }
}
@media (max-width: 639px) {
  .cta-section {
    padding: 60px 0;
  }
  .cta-right {
    padding: 28px 24px;
  }
}

/* =========================================================
   页脚
========================================================= */
.site-footer {
  background: #21201D;
  color: var(--deep-muted);
  padding: 72px 0 32px;
  font-size: 14px;
}
.site-footer .brand {
  margin-bottom: 20px;
}
.site-footer h4 {
  color: var(--deep-text);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}
.site-footer ul li {
  margin-bottom: 12px;
}
.site-footer ul li a {
  color: rgba(242, 239, 233, 0.6);
  transition: var(--transition);
}
.site-footer ul li a:hover {
  color: var(--copper-light);
}
.site-footer p {
  color: rgba(242, 239, 233, 0.5);
  line-height: 1.7;
  margin-bottom: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 56px;
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
}
.footer-bottom p {
  margin-bottom: 0;
}
@media (max-width: 639px) {
  .site-footer {
    padding: 48px 0 24px;
  }
  .footer-bottom {
    flex-direction: column;
  }
}

/* =========================================================
   动画与可访问性
========================================================= */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .5s ease, transform .5s ease;
}
.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  html {
    scroll-behavior: auto;
  }
  .animate-in {
    opacity: 1;
    transform: none;
  }
}

/* roulang page: article */
:root{
  --primary:#1A1A18;
  --accent:#B8935C;
  --accent-hover:#C9A46E;
  --accent-soft:rgba(184,147,92,0.15);
  --bg-warm:#F6F4EF;
  --bg-alt:#ECE9E2;
  --bg-card:#FFFFFF;
  --text-main:#26241F;
  --text-weak:#6E6A61;
  --border-line:#E2DED5;
  --text-on-dark:#F2EFE9;
  --text-on-dark-weak:#B8B2A6;
  --radius-card:12px;
  --radius-img:8px;
  --radius-btn:999px;
  --shadow-regular:0 8px 24px rgba(30,20,0,0.06);
  --shadow-hover:0 16px 40px rgba(30,20,0,0.10);
  --transition:all .25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Inter","Helvetica Neue",Arial,sans-serif;
  background:var(--bg-warm);
  color:var(--text-main);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none;transition:var(--transition)}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit;border:none;background:none;cursor:pointer}
input,textarea{font-family:inherit}
ul,ol{list-style:none}
.grid-container{max-width:1200px;padding-right:1.5rem;padding-left:1.5rem}
.narrow{max-width:820px;margin:0 auto}
/* ========== buttons ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 30px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:var(--transition);white-space:nowrap;
}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-outline{background:transparent;border:1px solid var(--accent);color:var(--accent)}
.btn-outline:hover{background:var(--accent-soft)}
.btn-nav{padding:10px 22px;font-size:14px;margin-left:6px}
/* ========== floating nav ========== */
.site-nav{
  position:fixed;top:10px;left:50%;transform:translateX(-50%);
  width:calc(100% - 32px);max-width:1200px;z-index:1000;
  background:rgba(255,255,255,0.88);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--border-line);
  border-radius:999px;
  box-shadow:0 4px 20px rgba(30,20,0,0.05);
  transition:all .3s ease;
}
.site-nav.scrolled{box-shadow:0 10px 36px rgba(30,20,0,0.10);top:8px}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:60px;padding:0 16px;
  transition:height .25s ease;
}
.site-nav.scrolled .nav-inner{height:52px}
.brand{display:inline-flex;align-items:baseline;gap:8px;flex-shrink:0}
.brand-logo{font-size:24px;font-weight:800;color:var(--primary);letter-spacing:-1px;line-height:1}
.brand-text{font-size:14px;font-weight:600;color:var(--text-weak)}
.nav-menu{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-block;padding:9px 18px;border-radius:999px;
  font-size:15px;font-weight:500;color:var(--text-main);
  transition:var(--transition);
}
.nav-link:hover{color:var(--accent);background:rgba(184,147,92,0.10)}
.nav-link.active{color:var(--accent);background:var(--accent-soft);font-weight:600}
.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:42px;height:42px;border-radius:10px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text-main);border-radius:2px;transition:var(--transition)}
.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-open .nav-toggle span:nth-child(2){opacity:0}
.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* ========== breadcrumb ========== */
.breadcrumb-wrap{
  background:var(--bg-alt);
  padding:96px 24px 16px;
  border-bottom:1px solid var(--border-line);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;font-size:14px;color:var(--text-weak);gap:6px;max-width:820px;margin:0 auto}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--border-line);margin:0 2px}
.breadcrumb .current{color:var(--text-weak);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:340px}
/* ========== article header ========== */
.article-header{padding:44px 24px 28px;max-width:820px;margin:0 auto}
.article-header h1{
  font-size:44px;line-height:1.28;font-weight:700;
  letter-spacing:-.02em;margin-bottom:20px;
  color:var(--primary);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  padding-bottom:24px;border-bottom:1px solid var(--border-line);
  font-size:14px;color:var(--text-weak);
}
.meta-sep{color:var(--border-line)}
.meta-category{color:var(--accent);font-weight:500}
.meta-category:hover{text-decoration:underline}
/* ========== article content ========== */
.article-content{padding:32px 24px 8px;max-width:820px;margin:0 auto}
.article-content p{
  font-size:16px;line-height:1.8;margin-bottom:26px;
  color:var(--text-main);word-wrap:break-word;
}
.article-content h2{
  font-size:27px;font-weight:700;letter-spacing:-.01em;
  color:var(--primary);margin:48px 0 16px;line-height:1.4;
}
.article-content h3{
  font-size:22px;font-weight:600;color:var(--primary);
  margin:36px 0 14px;line-height:1.4;
}
.article-content h4{
  font-size:18px;font-weight:600;color:var(--primary);
  margin:28px 0 12px;
}
.article-content ul{
  list-style:disc;padding-left:24px;margin-bottom:26px;
}
.article-content ol{
  list-style:decimal;padding-left:24px;margin-bottom:26px;
}
.article-content li{margin-bottom:8px;line-height:1.75}
.article-content a{color:var(--accent);text-decoration:underline}
.article-content a:hover{color:var(--accent-hover)}
.article-content img{
  width:100%;border-radius:var(--radius-img);
  margin:28px 0;background:#E9E4DB;
  aspect-ratio:16/9;object-fit:cover;
}
.article-content figure{margin:28px 0}
.article-content figcaption{
  font-size:13px;color:var(--text-weak);
  text-align:center;margin-top:-18px;margin-bottom:24px;
  background:var(--bg-alt);padding:8px;border-radius:0 0 8px 8px;
}
.article-content blockquote{
  border-left:3px solid var(--accent);
  background:var(--bg-alt);
  padding:18px 22px;border-radius:0 8px 8px 0;
  margin:28px 0;color:var(--text-weak);
  font-style:normal;
}
.article-content blockquote p{margin-bottom:0;color:var(--text-weak)}
.article-content pre{
  background:var(--bg-alt);padding:18px 20px;
  border-radius:var(--radius-img);overflow-x:auto;
  font-size:14px;line-height:1.7;margin:26px 0;
  border:1px solid var(--border-line);
}
.article-content code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;background:var(--bg-alt);padding:2px 6px;border-radius:6px;font-size:14px}
.article-content pre code{background:transparent;padding:0;border-radius:0}
.article-content table{
  width:100%;border-collapse:collapse;margin:28px 0;
  font-size:15px;
}
.article-content th{
  background:var(--primary);color:var(--text-on-dark);
  padding:12px 14px;text-align:left;font-weight:600;
}
.article-content td{
  border-bottom:1px solid var(--border-line);
  padding:12px 14px;
}
.article-content tr:nth-child(even){background:var(--bg-alt)}
.article-content hr{border:none;height:1px;background:var(--border-line);margin:36px 0}
/* ========== tags ========== */
.article-tags{
  max-width:820px;margin:30px auto 0;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:12px;
}
.tag-group{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-block;padding:7px 16px;
  background:var(--bg-alt);border-radius:999px;
  font-size:13px;color:var(--text-weak);
  transition:var(--transition);
}
.tag:hover{background:var(--accent-soft);color:var(--accent)}
.back-link{font-size:14px;font-weight:500;color:var(--text-weak)}
.back-link:hover{color:var(--accent)}
/* ========== CTA bar ========== */
.article-cta{padding:36px 24px 28px;max-width:820px;margin:0 auto}
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:var(--bg-alt);border-radius:var(--radius-card);
  padding:26px 30px;flex-wrap:wrap;
}
.cta-bar .cta-text{font-size:16px;font-weight:600;color:var(--text-main)}
.cta-bar .cta-text small{display:block;font-size:13px;font-weight:400;color:var(--text-weak);margin-top:4px}
/* ========== related ========== */
.related-section{
  padding:50px 24px 70px;
  border-top:1px solid var(--border-line);
  background:var(--bg-card);
}
.related-inner{max-width:1200px;margin:0 auto}
.related-inner h2{font-size:28px;font-weight:700;letter-spacing:-.01em;margin-bottom:28px;color:var(--primary)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.related-card{
  background:var(--bg-warm);border-radius:var(--radius-card);
  overflow:hidden;border:1px solid var(--border-line);
  box-shadow:var(--shadow-regular);
  transition:var(--transition);
}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(184,147,92,0.3)}
.related-card img{width:100%;height:170px;object-fit:cover;background:#E9E4DB}
.related-card-body{padding:20px 22px 22px}
.related-card .related-tag{
  display:inline-block;font-size:12px;font-weight:600;color:var(--accent);
  background:var(--accent-soft);padding:4px 10px;border-radius:999px;margin-bottom:10px;
}
.related-card h3{font-size:17px;font-weight:600;line-height:1.45;margin-bottom:8px;color:var(--text-main)}
.related-card p{font-size:14px;color:var(--text-weak);line-height:1.6}
.related-card .related-meta{display:flex;align-items:center;justify-content:space-between;margin-top:14px;font-size:13px;color:var(--text-weak)}
.related-card .related-meta .arrow{color:var(--accent);font-weight:700}
/* ========== not found ========== */
.not-found-wrap{
  max-width:820px;margin:0 auto;padding:120px 24px 140px;
  text-align:center;
}
.not-found-wrap p{font-size:22px;font-weight:600;color:var(--text-main);margin-bottom:24px}
/* ========== footer ========== */
.site-footer{background:#21201D;color:var(--text-on-dark);padding:64px 0 30px;margin-top:auto}
.site-footer .grid-container{max-width:1200px}
.text-on-dark{color:var(--text-on-dark)}
footer a{color:var(--text-on-dark-weak)}
footer a:hover{color:var(--accent)}
.footer-brand p{font-size:14px;color:var(--text-on-dark-weak);margin-top:16px;line-height:1.7;max-width:340px}
.site-footer h4{
  font-size:16px;font-weight:600;color:var(--text-on-dark);
  margin-bottom:16px;letter-spacing:.02em;
}
.site-footer ul{list-style:none}
.site-footer ul li{margin-bottom:10px;font-size:14px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.08);
  padding-top:22px;margin-top:40px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--text-on-dark-weak);
}
.brand-light .brand-logo{color:var(--text-on-dark)}
.brand-light .brand-text{color:var(--text-on-dark-weak)}
/* ========== responsive ========== */
@media(max-width:1024px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .nav-link{padding:9px 14px;font-size:14px}
}
@media(max-width:768px){
  .site-nav{border-radius:18px;width:calc(100% - 24px)}
  .nav-inner{height:58px;padding:0 12px}
  .site-nav.scrolled .nav-inner{height:54px}
  .nav-toggle{display:flex}
  .nav-menu{
    position:fixed;top:70px;left:12px;right:12px;
    background:rgba(255,255,255,0.97);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-radius:18px;
    border:1px solid var(--border-line);
    box-shadow:var(--shadow-hover);
    flex-direction:column;align-items:stretch;gap:6px;
    padding:14px;
    opacity:0;transform:translateY(-10px);
    pointer-events:none;
    transition:var(--transition);
  }
  .nav-open .nav-menu{opacity:1;transform:translateY(0);pointer-events:auto}
  .nav-link{text-align:center;padding:12px 16px;font-size:15px}
  .btn-nav{margin:10px 0 0;width:100%}
  .article-header h1{font-size:32px}
  .article-content h2{font-size:23px}
  .article-content h3{font-size:19px}
  .related-grid{grid-template-columns:1fr}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:22px 20px}
  .breadcrumb-wrap{padding-top:86px}
}
@media(max-width:520px){
  .article-header h1{font-size:28px}
  .article-content{padding:22px 18px 6px}
  .article-header{padding:34px 18px 22px}
  .article-tags{padding:0 18px}
  .article-cta{padding:30px 18px 22px}
  .related-section{padding:40px 18px 54px}
  .breadcrumb-wrap{padding-left:18px;padding-right:18px}
  .breadcrumb .current{max-width:200px}
}
@media(prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
}