/* roulang page: index */
:root {
  --color-bg: #0B1324;
  --color-bg-deep: #070D1A;
  --color-surface: rgba(255,255,255,0.05);
  --color-stroke: rgba(255,255,255,0.10);
  --color-primary: #1E5BFF;
  --color-accent: #00E5C1;
  --color-gold: #F5B84C;
  --color-text: #E8EDF6;
  --color-text-secondary: #A6B3C8;
  --color-muted: #6F7C8F;
  --color-error: #FF5C5C;
  --color-success: #29D97A;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.25);
  --shadow-cta: 0 0 24px rgba(0,229,193,0.35);
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-num: "Inter", "Roboto", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

ul, ol {
  list-style: none;
}

a {
  text-decoration: none;
  color: inherit;
}

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

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

button {
  cursor: pointer;
  background: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 24px;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background: rgba(0, 229, 193, 0.08);
  border: 1px solid rgba(0, 229, 193, 0.2);
  border-radius: 999px;
  padding: 4px 16px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

/* ========== Sidebar ========== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background: var(--color-bg-deep);
  border-right: 1px solid var(--color-stroke);
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-accent), transparent 40%);
  opacity: 0.6;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 28px 20px 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 8px 28px;
  border-bottom: 1px solid var(--color-stroke);
  margin-bottom: 24px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  background: rgba(0, 229, 193, 0.08);
  border: 1px solid rgba(0, 229, 193, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-mark svg {
  width: 26px;
  height: 26px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text);
  white-space: nowrap;
}

.brand-sub {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-muted);
  text-transform: uppercase;
  margin-top: 2px;
}

.side-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.25s ease;
  border-left: 2px solid transparent;
}

.nav-link i {
  width: 20px;
  text-align: center;
  font-size: 1rem;
  color: var(--color-muted);
  transition: color 0.25s ease;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text);
  transform: translateX(2px);
}

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

.nav-link.active {
  background: rgba(30, 91, 255, 0.12);
  border-left-color: var(--color-accent);
  color: var(--color-text);
  box-shadow: 0 0 20px rgba(0, 229, 193, 0.05);
}

.nav-link.active i {
  color: var(--color-accent);
}

.side-foot {
  padding-top: 20px;
  border-top: 1px solid var(--color-stroke);
}

.side-cta {
  display: block;
  text-align: center;
  padding: 12px 16px;
  background: linear-gradient(135deg, #00E5C1, #00B8A0);
  color: #04121A;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-cta);
  transition: all 0.3s ease;
}

.side-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(0, 229, 193, 0.45);
}

.side-copy {
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-top: 14px;
}

/* ========== Main Wrap ========== */
.main-wrap {
  margin-left: 260px;
  min-height: 100vh;
  background:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(135deg, #0B1324 0%, #0E1D35 100%);
  background-size: 44px 44px, 44px 44px, cover;
}

/* ========== Mobile Header ========== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  background: rgba(7, 13, 26, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-stroke);
  z-index: 200;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

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

.mobile-logo .brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.mobile-logo .brand-mark svg {
  width: 20px;
  height: 20px;
}

.mobile-logo-text {
  font-size: 1rem;
  font-weight: 700;
  white-space: nowrap;
}

.mobile-hamburger {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-stroke);
  font-size: 1.15rem;
}

/* ========== Drawer ========== */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.drawer-overlay.show {
  opacity: 1;
  visibility: visible;
}

.drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 280px;
  height: 100vh;
  background: var(--color-bg-deep);
  z-index: 400;
  padding: 24px 20px;
  transform: translateX(-100%);
  transition: transform 0.35s cubic-bezier(0.77, 0, 0.18, 1);
  display: flex;
  flex-direction: column;
}

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

.drawer .brand {
  margin-bottom: 20px;
  padding-bottom: 20px;
}

.drawer .nav-link {
  padding: 14px 16px;
}

.drawer .side-cta {
  margin-top: auto;
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(7, 13, 26, 0.95) 0%, rgba(7, 13, 26, 0.78) 45%, rgba(7, 13, 26, 0.35) 100%);
}

.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 120px;
  background: linear-gradient(0deg, #0B1324 0%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: 80px 48px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-accent);
  background: rgba(0, 229, 193, 0.08);
  border: 1px solid rgba(0, 229, 193, 0.2);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 24px;
}

.hero-badge i {
  font-size: 0.7rem;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-accent), #00B8A0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.06rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 36px;
  max-width: 600px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background: linear-gradient(135deg, #00E5C1, #00B8A0);
  color: #04121A;
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-cta);
  transition: all 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(0, 229, 193, 0.45);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  color: var(--color-text);
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-stroke);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  border-color: rgba(0, 229, 193, 0.4);
  background: rgba(0, 229, 193, 0.06);
  transform: translateY(-2px);
}

.hero-trust {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.hero-trust span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.hero-trust i {
  color: var(--color-accent);
  font-size: 0.8rem;
}

/* ========== Steps ========== */
.steps-section {
  position: relative;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.steps-grid::before {
  content: "";
  position: absolute;
  top: 48px;
  left: 15%;
  right: 15%;
  border-top: 2px dashed rgba(0, 229, 193, 0.2);
  z-index: 0;
}

.step-card {
  position: relative;
  z-index: 1;
  background: var(--color-surface);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--color-stroke);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.step-card:hover {
  border-color: rgba(0, 229, 193, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), 0 0 20px rgba(0, 229, 193, 0.05);
}

.step-num {
  font-family: var(--font-num);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: rgba(255, 255, 255, 0.08);
  position: absolute;
  top: 20px;
  right: 24px;
}

.step-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(0, 229, 193, 0.1);
  border: 1px solid rgba(0, 229, 193, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--color-accent);
  margin-bottom: 20px;
  box-shadow: 0 0 20px rgba(0, 229, 193, 0.08);
}

.step-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.step-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ========== Cases ========== */
.cases-section {
  background: linear-gradient(180deg, transparent 0%, rgba(30, 91, 255, 0.04) 50%, transparent 100%);
}

.cases-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.case-card {
  display: grid;
  grid-template-columns: 40% 60%;
  background: var(--color-surface);
  backdrop-filter: blur(18px);
  border: 1px solid var(--color-stroke);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.case-card:hover {
  border-color: rgba(0, 229, 193, 0.25);
  transform: translateY(-3px);
}

.case-card:nth-child(2) {
  transform: translateX(36px);
}

.case-card:nth-child(2):hover {
  transform: translateX(36px) translateY(-3px);
}

.case-cover {
  position: relative;
  min-height: 260px;
  background-size: cover;
  background-position: center;
}

.case-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 50%, rgba(11, 19, 36, 0.6) 100%);
}

.case-body {
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.case-client {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(30, 91, 255, 0.1);
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
  width: fit-content;
}

.case-body h3 {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.case-desc {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 18px;
}

.case-result {
  font-family: var(--font-num);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.case-quote {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  border-left: 2px solid var(--color-accent);
  padding-left: 14px;
  font-style: italic;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--color-surface);
  backdrop-filter: blur(18px);
  border: 1px solid var(--color-stroke);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(0, 229, 193, 0.2);
}

.faq-item.open {
  border-color: rgba(0, 229, 193, 0.35);
  box-shadow: 0 0 24px rgba(0, 229, 193, 0.04);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-cn);
  text-align: left;
  background: transparent;
  transition: all 0.25s ease;
}

.faq-question:hover {
  color: var(--color-accent);
}

.faq-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0, 229, 193, 0.08);
  border: 1px solid rgba(0, 229, 193, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--color-accent);
  transition: all 0.35s ease;
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--color-accent);
  color: #04121A;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.75;
}

.faq-item.open .faq-answer {
  max-height: 200px;
}

.faq-answer p {
  padding: 0 26px 22px;
}

/* ========== News ========== */
.news-section {
  background: linear-gradient(180deg, transparent 0%, rgba(30, 91, 255, 0.03) 50%, transparent 100%);
}

.news-list {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--color-surface);
  backdrop-filter: blur(18px);
  border: 1px solid var(--color-stroke);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  transition: all 0.3s ease;
}

.news-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 229, 193, 0.25);
  transform: translateX(4px);
}

.news-date-block {
  flex-shrink: 0;
  width: 68px;
  height: 68px;
  border-radius: 14px;
  background: rgba(0, 229, 193, 0.06);
  border: 1px solid rgba(0, 229, 193, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  font-family: var(--font-num);
}

.news-date-block .date-day {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.1;
}

.news-date-block .date-label {
  font-size: 0.68rem;
  color: var(--color-muted);
  margin-top: 2px;
}

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

.news-info h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.25s ease;
}

.news-card:hover .news-info h3 {
  color: var(--color-accent);
}

.news-info p {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}

.news-tag {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--color-accent);
  background: rgba(0, 229, 193, 0.07);
  border: 1px solid rgba(0, 229, 193, 0.15);
  border-radius: var(--radius-sm);
  padding: 2px 10px;
}

.news-arrow {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-stroke);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.news-card:hover .news-arrow {
  transform: translateX(4px);
  color: var(--color-accent);
  border-color: rgba(0, 229, 193, 0.4);
}

.news-empty {
  text-align: center;
  padding: 60px 20px;
}

.empty-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 20px;
  background: rgba(0, 229, 193, 0.04);
  border: 1px solid rgba(0, 229, 193, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--color-muted);
  box-shadow: 0 0 40px rgba(0, 229, 193, 0.05);
}

.news-empty p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ========== CTA ========== */
.cta-section {
  padding: 80px 24px;
}

.cta-panel {
  max-width: 1200px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(11, 19, 36, 0.9), rgba(14, 29, 53, 0.95));
  border: 1px solid var(--color-stroke);
  border-radius: calc(var(--radius-lg) + 8px);
  backdrop-filter: blur(20px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.4);
}

.cta-left {
  padding: 56px 48px;
  background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  position: relative;
}

.cta-left::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(7, 13, 26, 0.92), rgba(7, 13, 26, 0.7));
}

.cta-left-inner {
  position: relative;
  z-index: 2;
}

.cta-left h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}

.cta-left p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.cta-points {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cta-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.cta-points i {
  color: var(--color-accent);
  font-size: 0.8rem;
}

.cta-right {
  padding: 56px 48px;
}

.cta-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-group {
  position: relative;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.form-group label .required {
  color: var(--color-error);
  margin-left: 2px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.92rem;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(0, 229, 193, 0.12);
  background: rgba(0, 229, 193, 0.03);
}

.form-group textarea {
  min-height: 90px;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-muted);
}

.form-error {
  font-size: 0.75rem;
  color: var(--color-error);
  margin-top: 4px;
  min-height: 16px;
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--color-error);
}

.form-feedback {
  font-size: 0.85rem;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  display: none;
}

.form-feedback.success {
  display: block;
  color: var(--color-success);
  background: rgba(41, 217, 122, 0.08);
  border: 1px solid rgba(41, 217, 122, 0.3);
}

.form-feedback.error {
  display: block;
  color: var(--color-error);
  background: rgba(255, 92, 92, 0.08);
  border: 1px solid rgba(255, 92, 92, 0.3);
}

.btn-submit {
  width: 100%;
  padding: 14px 24px;
  background: linear-gradient(135deg, #00E5C1, #00B8A0);
  color: #04121A;
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-cta);
  transition: all 0.3s ease;
  margin-top: 4px;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(0, 229, 193, 0.45);
}

.btn-submit:active {
  transform: translateY(0);
  box-shadow: 0 4px 20px rgba(0, 229, 193, 0.3);
}

/* ========== Footer ========== */
.site-footer {
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-stroke);
  padding: 56px 24px 24px;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-brand .brand-name {
  font-size: 1.2rem;
  margin-bottom: 12px;
  display: block;
}

.footer-brand p {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}

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

.footer-links a {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  transition: all 0.25s ease;
}

.footer-links a:hover {
  color: var(--color-accent);
  transform: translateX(3px);
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  margin-bottom: 10px;
}

.footer-contact i {
  color: var(--color-accent);
  width: 16px;
  text-align: center;
  font-size: 0.8rem;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid var(--color-stroke);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: var(--color-muted);
}

/* ========== Focus ========== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ========== Responsive ========== */
@media (max-width: 1200px) {
  .hero-content {
    padding: 60px 36px;
  }
}

@media (max-width: 1023px) {
  .sidebar {
    width: 72px;
  }

  .sidebar-inner {
    padding: 20px 10px;
    align-items: center;
  }

  .brand {
    padding: 8px 0 20px;
    justify-content: center;
    border-bottom: 1px solid var(--color-stroke);
    margin-bottom: 18px;
  }

  .brand-text {
    display: none;
  }

  .nav-link {
    justify-content: center;
    padding: 14px;
  }

  .nav-link span {
    display: none;
  }

  .nav-link i {
    font-size: 1.1rem;
  }

  .side-foot {
    text-align: center;
  }

  .side-cta {
    font-size: 0;
    padding: 14px;
  }

  .side-cta::before {
    content: "\f2f5";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 1.1rem;
  }

  .side-copy {
    display: none;
  }

  .main-wrap {
    margin-left: 72px;
  }
}

@media (max-width: 767px) {
  .sidebar {
    display: none;
  }

  .mobile-header {
    display: flex;
  }

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

  .hero {
    min-height: 60vh;
  }

  .hero-content {
    padding: 48px 24px;
  }

  .hero h1 {
    font-size: clamp(1.6rem, 6vw, 2.2rem);
  }

  .hero-trust {
    gap: 16px;
    flex-direction: column;
    align-items: flex-start;
  }

  .section {
    padding: 48px 20px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
  }

  .steps-grid::before {
    display: none;
  }

  .case-card {
    grid-template-columns: 1fr;
  }

  .case-card:nth-child(2) {
    transform: none;
  }

  .case-card:nth-child(2):hover {
    transform: translateY(-3px);
  }

  .case-cover {
    min-height: 200px;
  }

  .case-cover::after {
    background: linear-gradient(0deg, rgba(11, 19, 36, 0.6) 0%, transparent 100%);
  }

  .cta-panel {
    grid-template-columns: 1fr;
  }

  .cta-left,
  .cta-right {
    padding: 36px 24px;
  }

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

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

  .news-card {
    flex-direction: row;
    padding: 20px;
    gap: 14px;
  }

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

  .news-info h3 {
    white-space: normal;
    font-size: 0.95rem;
  }

  .news-arrow {
    display: none;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .container,
  .section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .step-card {
    padding: 28px 22px;
  }

  .case-body {
    padding: 24px 20px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 0.95rem;
  }

  .cta-left,
  .cta-right {
    padding: 28px 20px;
  }

  .mobile-header {
    padding: 0 16px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }
}

/* roulang page: category1 */
:root {
    --color-bg: #0B1324;
    --color-bg-deep: #070D1A;
    --color-surface: rgba(255, 255, 255, 0.05);
    --color-stroke: rgba(255, 255, 255, 0.10);
    --color-primary: #1E5BFF;
    --color-accent: #00E5C1;
    --color-gold: #F5B84C;
    --color-text: #E8EDF6;
    --color-text-secondary: #A6B3C8;
    --color-muted: #6F7C8F;
    --color-error: #FF5C5C;
    --color-success: #29D97A;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
    --shadow-cta: 0 0 24px rgba(0, 229, 193, 0.35);
    --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    --font-digital: "Inter", "Roboto", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

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

  a {
    color: inherit;
    text-decoration: none;
  }

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

  button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
  }

  input,
  textarea {
    font-family: inherit;
  }

  ul,
  ol {
    list-style: none;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }

  .page-shell {
    margin-left: 260px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.3s ease;
  }

  .main-content {
    flex: 1;
    background: linear-gradient(135deg, var(--color-bg) 0%, #0E1D35 100%);
    position: relative;
  }

  .main-content::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
      linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
  }

  .main-content>* {
    position: relative;
    z-index: 1;
  }

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

  .section-tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 6px;
    background: rgba(0, 229, 193, 0.10);
    border: 1px solid rgba(0, 229, 193, 0.3);
    color: var(--color-accent);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
    margin-bottom: 16px;
  }

  .section-title {
    font-size: clamp(1.6rem, 2.8vw, 2.1rem);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
    margin-bottom: 12px;
  }

  .section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.3s ease, background 0.2s ease;
    cursor: pointer;
    text-align: center;
    border: 1px solid transparent;
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--color-accent), #00B8A0);
    color: #04121A;
    box-shadow: var(--shadow-cta);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(0, 229, 193, 0.45);
    color: #04121A;
  }

  .btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--color-stroke);
    color: var(--color-text);
    backdrop-filter: blur(12px);
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.10);
    transform: translateY(-2px);
    color: var(--color-text);
  }

  .btn-block {
    width: 100%;
  }

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

  /* ===== Sidebar ===== */
  .app-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 260px;
    background: var(--color-bg-deep);
    z-index: 100;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--color-stroke);
    transition: transform 0.3s ease, width 0.3s ease;
  }

  .sidebar-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 24px 16px;
    background: linear-gradient(180deg, rgba(30, 91, 255, 0.04) 0%, transparent 200px);
  }

  .brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 8px 32px;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    font-size: 18px;
    font-family: var(--font-digital);
    box-shadow: 0 0 20px rgba(30, 91, 255, 0.3);
    flex-shrink: 0;
  }

  .brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
    overflow: hidden;
  }

  .brand-name {
    color: var(--color-text);
    font-weight: 700;
    font-size: 17px;
    letter-spacing: 0.02em;
    white-space: nowrap;
  }

  .brand-sub {
    color: var(--color-muted);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    white-space: nowrap;
  }

  .side-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 8px;
  }

  .nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s, color 0.2s, transform 0.2s;
    position: relative;
    width: 100%;
  }

  .nav-link i {
    width: 20px;
    text-align: center;
    font-size: 15px;
    flex-shrink: 0;
  }

  .nav-link:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text);
    transform: translateX(2px);
  }

  .nav-link.active {
    background: rgba(30, 91, 255, 0.12);
    color: var(--color-text);
  }

  .nav-link.active::before {
    content: "";
    position: absolute;
    left: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 24px;
    background: var(--color-accent);
    box-shadow: 0 0 10px rgba(0, 229, 193, 0.7);
  }

  .sidebar-footer {
    margin-top: auto;
    padding-top: 16px;
  }

  .sidebar-cta {
    display: block;
    text-align: center;
    padding: 12px;
    background: linear-gradient(135deg, var(--color-accent), #00B8A0);
    color: #04121A;
    font-weight: 700;
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: box-shadow 0.3s, transform 0.2s;
  }

  .sidebar-cta:hover {
    box-shadow: var(--shadow-cta);
    transform: translateY(-2px);
    color: #04121A;
  }

  /* ===== Mobile header ===== */
  .mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(7, 13, 26, 0.95);
    backdrop-filter: blur(18px);
    z-index: 90;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    border-bottom: 1px solid var(--color-stroke);
  }

  .mobile-brand {
    color: var(--color-text);
    font-weight: 700;
    font-size: 16px;
    letter-spacing: 0.02em;
  }

  .menu-toggle {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: background 0.2s;
  }

  .menu-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
  }

  .sidebar-mask {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 95;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    display: none;
  }

  .sidebar-mask.show {
    opacity: 1;
    visibility: visible;
  }

  /* ===== Category Hero ===== */
  .cate-hero {
    padding: 80px 0 56px;
    background:
      linear-gradient(135deg, rgba(11, 19, 36, 0.92) 0%, rgba(11, 19, 36, 0.78) 50%, rgba(14, 29, 53, 0.65) 100%),
      url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
    border-bottom: 1px solid var(--color-stroke);
  }

  .breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 32px;
  }

  .breadcrumb a {
    color: var(--color-text-secondary);
    transition: color 0.2s;
  }

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

  .breadcrumb i {
    font-size: 10px;
    color: var(--color-muted);
  }

  .breadcrumb span {
    color: var(--color-text);
  }

  .cate-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 6px;
    background: rgba(0, 229, 193, 0.10);
    border: 1px solid rgba(0, 229, 193, 0.3);
    color: var(--color-accent);
    font-size: 13px;
    font-weight: 600;
  }

  .cate-hero-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 800;
    color: var(--color-text);
    line-height: 1.25;
    margin: 16px 0 20px;
    max-width: 760px;
  }

  .cate-hero-desc {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 640px;
    line-height: 1.8;
    margin-bottom: 32px;
  }

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

  .hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    padding: 18px 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-stroke);
    border-radius: var(--radius-md);
    backdrop-filter: blur(18px);
    max-width: 640px;
  }

  .trust-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    font-size: 14px;
  }

  .trust-item i {
    color: var(--color-accent);
    font-size: 13px;
  }

  /* ===== Services ===== */
  .services-section {
    padding: 80px 0;
  }

  .services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .service-card {
    background: var(--color-surface);
    border: 1px solid var(--color-stroke);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    backdrop-filter: blur(18px);
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    display: flex;
    flex-direction: column;
  }

  .service-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 229, 193, 0.4);
    box-shadow: var(--shadow-card);
  }

  .service-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: rgba(30, 91, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-size: 24px;
    margin-bottom: 24px;
    border: 1px solid rgba(0, 229, 193, 0.2);
  }

  .service-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
  }

  .service-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
    flex: 1;
  }

  .card-link {
    color: var(--color-accent);
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.2s, opacity 0.2s;
  }

  .card-link:hover {
    gap: 10px;
    opacity: 0.85;
  }

  /* ===== Feature 图文介绍 ===== */
  .feature-section {
    padding: 40px 0 80px;
  }

  .feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .feature-media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
  }

  .feature-media img {
    width: 100%;
    height: 380px;
    object-fit: cover;
  }

  .feature-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(7, 13, 26, 0.7) 100%);
  }

  .feature-media-badge {
    position: absolute;
    left: 20px;
    bottom: 20px;
    z-index: 2;
    padding: 8px 16px;
    background: rgba(0, 229, 193, 0.18);
    border: 1px solid rgba(0, 229, 193, 0.35);
    border-radius: 8px;
    color: var(--color-text);
    font-size: 13px;
    font-weight: 600;
    backdrop-filter: blur(12px);
  }

  .feature-content {
    padding: 16px 0;
  }

  .feature-content .section-tag {
    margin-bottom: 12px;
  }

  .feature-content h2 {
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.35;
    margin-bottom: 20px;
  }

  .feature-content>p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 28px;
  }

  .feature-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 32px;
  }

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

  .feature-list i {
    color: var(--color-accent);
    margin-top: 3px;
  }

  /* ===== Scenario ===== */
  .scenario-section {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--color-stroke);
    border-bottom: 1px solid var(--color-stroke);
  }

  .scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .scenario-card {
    background: var(--color-surface);
    border: 1px solid var(--color-stroke);
    border-radius: var(--radius-lg);
    padding: 28px;
    backdrop-filter: blur(18px);
    transition: transform 0.25s, border-color 0.25s;
  }

  .scenario-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 229, 193, 0.35);
  }

  .scenario-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(0, 229, 193, 0.1);
    border: 1px solid rgba(0, 229, 193, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-size: 20px;
    margin-bottom: 20px;
  }

  .scenario-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 10px;
  }

  .scenario-card p {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.7;
  }

  /* ===== Process ===== */
  .process-section {
    padding: 80px 0;
  }

  .process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .process-step {
    position: relative;
    padding: 28px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-stroke);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(18px);
    transition: border-color 0.25s, transform 0.25s;
  }

  .process-step:hover {
    border-color: rgba(0, 229, 193, 0.4);
    transform: translateY(-3px);
  }

  .process-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 52px;
    left: calc(100%);
    width: 24px;
    border-top: 2px dashed rgba(0, 229, 193, 0.3);
  }

  .step-num {
    font-family: var(--font-digital);
    font-size: 2.4rem;
    font-weight: 800;
    color: transparent;
    -webkit-text-stroke: 1px rgba(0, 229, 193, 0.5);
    display: block;
    margin-bottom: 16px;
    line-height: 1;
  }

  .step-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 12px rgba(0, 229, 193, 0.6);
    display: inline-block;
    margin-bottom: 14px;
  }

  .process-step h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
  }

  .process-step p {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.7;
  }

  /* ===== Stats ===== */
  .stats-section {
    padding: 40px 0 80px;
  }

  .stats-panel {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 40px;
    background: linear-gradient(135deg, rgba(30, 91, 255, 0.08), rgba(0, 229, 193, 0.04));
    border: 1px solid var(--color-stroke);
    border-radius: 20px;
    backdrop-filter: blur(18px);
  }

  .stats-item {
    text-align: center;
    padding: 16px;
  }

  .stats-num {
    display: block;
    font-family: var(--font-digital);
    font-size: clamp(2rem, 3vw, 2.6rem);
    font-weight: 800;
    color: var(--color-gold);
    line-height: 1.2;
    margin-bottom: 8px;
  }

  .stats-label {
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
  }

  /* ===== FAQ ===== */
  .faq-section {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--color-stroke);
  }

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

  .faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-stroke);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    backdrop-filter: blur(18px);
    overflow: hidden;
    transition: border-color 0.25s;
  }

  .faq-item.active {
    border-color: rgba(0, 229, 193, 0.3);
  }

  .faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    transition: color 0.2s;
  }

  .faq-question:hover {
    color: var(--color-accent);
  }

  .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(0, 229, 193, 0.1);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s, background 0.3s, color 0.3s;
    font-size: 13px;
    flex-shrink: 0;
  }

  .faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: var(--color-accent);
    color: #04121A;
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    padding: 0 24px;
  }

  .faq-item.active .faq-answer {
    max-height: 400px;
    padding-bottom: 22px;
  }

  .faq-answer p {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.8;
  }

  /* ===== CTA ===== */
  .cta-section {
    padding: 80px 0;
  }

  .cta-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    padding: 48px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    border: 1px solid var(--color-stroke);
    border-radius: 20px;
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow-card);
  }

  .cta-content h2 {
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.35;
    margin-bottom: 16px;
  }

  .cta-content>p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
  }

  .cta-points {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .cta-points li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
    font-size: 14px;
  }

  .cta-points i {
    color: var(--color-accent);
  }

  .cta-form .form-group {
    margin-bottom: 18px;
  }

  .cta-form label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 8px;
  }

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

  .cta-form input,
  .cta-form textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
  }

  .cta-form input:focus,
  .cta-form textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 229, 193, 0.15);
  }

  .cta-form input.invalid,
  .cta-form textarea.invalid {
    border-color: var(--color-error);
  }

  .error-msg {
    display: block;
    min-height: 18px;
    font-size: 12px;
    color: var(--color-error);
    margin-top: 4px;
  }

  .form-status {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    display: none;
  }

  .form-status.success {
    display: block;
    background: rgba(41, 217, 122, 0.12);
    border: 1px solid rgba(41, 217, 122, 0.4);
    color: var(--color-success);
  }

  .form-status.error {
    display: block;
    background: rgba(255, 92, 92, 0.12);
    border: 1px solid rgba(255, 92, 92, 0.4);
    color: var(--color-error);
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--color-bg-deep);
    border-top: 1px solid var(--color-stroke);
    padding: 56px 32px 24px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .footer-brand .brand-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    display: block;
    margin-bottom: 14px;
  }

  .footer-brand p {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.8;
    max-width: 360px;
  }

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

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

  .footer-links a {
    color: var(--color-text-secondary);
    font-size: 14px;
    transition: color 0.2s, transform 0.2s;
    display: inline-block;
  }

  .footer-links a:hover {
    color: var(--color-accent);
    transform: translateX(3px);
  }

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

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

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

  .footer-bottom {
    max-width: 1200px;
    margin: 24px auto 0;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    color: var(--color-muted);
    font-size: 13px;
  }

  .footer-bottom p {
    margin: 0;
  }

  /* ===== Responsive ===== */
  @media (max-width: 1023px) and (min-width: 768px) {
    .app-sidebar {
      width: 72px;
    }
    .page-shell {
      margin-left: 72px;
    }
    .brand-text {
      display: none;
    }
    .brand-logo {
      justify-content: center;
      padding: 8px 0 24px;
    }
    .side-nav .nav-link {
      justify-content: center;
      padding: 14px 0;
    }
    .side-nav .nav-link span {
      display: none;
    }
    .nav-link.active::before {
      left: -8px;
    }
    .sidebar-footer {
      display: none;
    }
    .sidebar-inner {
      padding: 20px 10px;
    }
  }

  @media (max-width: 767px) {
    .mobile-header {
      display: flex;
    }
    .app-sidebar {
      transform: translateX(-100%);
      width: 280px;
      box-shadow: 4px 0 30px rgba(0, 0, 0, 0.4);
    }
    .app-sidebar.open {
      transform: translateX(0);
    }
    .sidebar-mask {
      display: block;
    }
    .page-shell {
      margin-left: 0;
    }
    .main-content {
      padding-top: 64px;
    }
    .container {
      padding: 0 20px;
    }
    .cate-hero {
      padding: 48px 0 40px;
    }
    .cate-hero-title {
      font-size: 1.7rem;
    }
    .cate-hero-desc {
      font-size: 0.95rem;
    }
    .hero-trust {
      gap: 16px;
      padding: 14px 18px;
    }
    .services-grid,
    .scenario-grid {
      grid-template-columns: 1fr;
    }
    .feature-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .feature-media img {
      height: 260px;
    }
    .process-grid {
      grid-template-columns: 1fr;
    }
    .process-step:not(:last-child)::after {
      display: none;
    }
    .stats-panel {
      grid-template-columns: 1fr 1fr;
      padding: 24px;
      gap: 16px;
    }
    .cta-panel {
      grid-template-columns: 1fr;
      padding: 32px 24px;
      gap: 32px;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
    .btn-block {
      width: 100%;
    }
    .cate-hero-actions .btn {
      flex: 1;
    }
  }

  @media (max-width: 480px) {
    .stats-panel {
      grid-template-columns: 1fr;
    }
    .services-grid,
    .scenario-grid {
      gap: 16px;
    }
    .process-grid {
      gap: 16px;
    }
    .cta-panel {
      padding: 24px 18px;
    }
  }

/* roulang page: article */
:root {
  --color-bg: #0B1324;
  --color-bg-deep: #070D1A;
  --color-surface: rgba(255, 255, 255, 0.05);
  --color-stroke: rgba(255, 255, 255, 0.10);
  --color-primary: #1E5BFF;
  --color-accent: #00E5C1;
  --color-gold: #F5B84C;
  --color-text: #E8EDF6;
  --color-text-secondary: #A6B3C8;
  --color-muted: #6F7C8F;
  --color-error: #FF5C5C;
  --color-success: #29D97A;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-tag: 6px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 24px rgba(0, 229, 193, 0.35);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-num: "Inter", "Roboto", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg-deep);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; box-shadow: none; color: inherit; }
ul, ol { padding-left: 1.4em; }

.app-shell {
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 80% 0%, rgba(30, 91, 255, 0.13) 0%, transparent 52%),
    radial-gradient(ellipse at 20% 100%, rgba(0, 229, 193, 0.06) 0%, transparent 46%),
    linear-gradient(135deg, #0B1324 0%, #0E1D35 100%);
}
.main-wrap {
  margin-left: 260px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ===== 左侧导航 ===== */
.side-panel {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background: var(--color-bg-deep);
  border-right: 1px solid var(--color-stroke);
  display: flex;
  flex-direction: column;
  padding: 28px 20px;
  z-index: 120;
  overflow-y: auto;
}
.side-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent, var(--color-accent), transparent);
  opacity: 0.35;
}
.side-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px 22px;
  border-bottom: 1px solid var(--color-stroke);
  margin-bottom: 18px;
}
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 0 18px rgba(0, 229, 193, 0.25);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.3; }
.brand-name { font-weight: 700; font-size: 1.05rem; letter-spacing: 0.02em; }
.brand-sub { font-size: 0.68rem; color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.12em; }

.side-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: background 0.2s, color 0.2s, transform 0.2s;
  position: relative;
}
.nav-link i { width: 20px; text-align: center; font-size: 1rem; }
.nav-link:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-1px);
}
.nav-link.active {
  color: var(--color-text);
  background: rgba(30, 91, 255, 0.14);
}
.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  height: 60%;
  width: 2px;
  border-radius: 2px;
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent);
}
.side-foot {
  padding: 16px 8px 0;
  border-top: 1px solid var(--color-stroke);
  font-size: 0.78rem;
  color: var(--color-muted);
}
.side-foot a { color: var(--color-muted); transition: color 0.2s; }
.side-foot a:hover { color: var(--color-accent); }

/* ===== 移动端顶部栏 ===== */
.top-bar {
  display: none;
  position: sticky;
  top: 0;
  height: 64px;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: rgba(7, 13, 26, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-stroke);
  z-index: 110;
}
.top-logo { font-weight: 800; font-size: 1.1rem; letter-spacing: 0.02em; }
.menu-btn {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--color-stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s;
}
.menu-btn:hover { background: rgba(255, 255, 255, 0.08); border-color: var(--color-accent); }
.side-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(2px);
  z-index: 115;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.side-overlay.show { opacity: 1; pointer-events: auto; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  line-height: 1.2;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}
.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.btn-accent {
  background: linear-gradient(135deg, #00E5C1, #00B8A0);
  color: #04121A;
  box-shadow: 0 4px 20px rgba(0, 229, 193, 0.35);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(0, 229, 193, 0.45);
}
.btn-secondary {
  background: rgba(30, 91, 255, 0.18);
  border: 1px solid rgba(30, 91, 255, 0.4);
  color: var(--color-text);
}
.btn-secondary:hover {
  background: rgba(30, 91, 255, 0.28);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(30, 91, 255, 0.25);
}
.btn-ghost {
  background: transparent;
  border: 1px solid var(--color-stroke);
  color: var(--color-text-secondary);
}
.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
  transform: translateY(-2px);
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover {
  background: #2f6cff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(30, 91, 255, 0.35);
}

/* ===== 文章 Hero ===== */
.article-hero {
  position: relative;
  padding: 72px 0 56px;
  background:
    linear-gradient(to right, rgba(7, 13, 26, 0.92) 0%, rgba(11, 19, 36, 0.76) 100%),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border-bottom: 1px solid var(--color-stroke);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--color-text-secondary); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb i { font-size: 0.7rem; }
.breadcrumb span { color: var(--color-accent); }
.article-hero h1 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.25;
  margin: 0 0 18px;
  max-width: 860px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}
.article-meta span { display: inline-flex; align-items: center; gap: 6px; }

/* ===== 正文排版 ===== */
.article-layout {
  padding: 56px 0 64px;
}
.article-content {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.85;
}
.article-content h2 {
  margin: 40px 0 16px;
  font-size: 1.5rem;
  line-height: 1.4;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-stroke);
}
.article-content h3 {
  margin: 32px 0 12px;
  font-size: 1.2rem;
  line-height: 1.5;
}
.article-content h4 { margin: 24px 0 10px; font-size: 1.05rem; }
.article-content p { margin: 0 0 20px; }
.article-content a { color: var(--color-accent); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.article-content a:hover { border-bottom-color: var(--color-accent); }
.article-content ul,
.article-content ol { margin: 0 0 20px; line-height: 1.8; }
.article-content li { margin-bottom: 6px; }
.article-content blockquote {
  margin: 24px 0;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--color-gold);
  border-radius: 0 10px 10px 0;
  color: var(--color-text-secondary);
}
.article-content blockquote p { margin: 0; }
.article-content img {
  border-radius: var(--radius-card);
  margin: 24px 0;
  box-shadow: var(--shadow-card);
}
.article-content pre {
  background: var(--color-bg-deep);
  border: 1px solid var(--color-stroke);
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 24px 0;
}
.article-content code {
  font-family: "SFMono-Regular", Consolas, monospace;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.875em;
}
.article-content pre code { background: none; padding: 0; }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9rem;
}
.article-content th,
.article-content td {
  border: 1px solid var(--color-stroke);
  padding: 10px 14px;
  text-align: left;
}
.article-content th { background: rgba(255, 255, 255, 0.05); color: var(--color-text); }
.article-content td { color: var(--color-text-secondary); }

/* ===== 空状态 ===== */
.empty-article {
  text-align: center;
  padding: 60px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-stroke);
  border-radius: var(--radius-card);
  backdrop-filter: blur(18px);
}
.empty-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-stroke);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--color-muted);
}
.empty-article h2 { font-size: 1.5rem; margin-bottom: 12px; }
.empty-article p { color: var(--color-text-secondary); margin-bottom: 24px; }

/* ===== 区块标题 ===== */
.section-head {
  margin-bottom: 36px;
  text-align: center;
}
.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 10px;
}
.section-head h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin: 0 0 10px;
  line-height: 1.3;
}
.section-head p {
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ===== 相关推荐 ===== */
.related-section {
  padding: 64px 0 72px;
  border-top: 1px solid var(--color-stroke);
  background: rgba(7, 13, 26, 0.4);
}
.related-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.related-card {
  flex: 1 1 300px;
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-stroke);
  border-radius: var(--radius-card);
  overflow: hidden;
  backdrop-filter: blur(18px);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 193, 0.4);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.card-cover { aspect-ratio: 16 / 9; overflow: hidden; }
.card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.related-card:hover .card-cover img { transform: scale(1.04); }
.card-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  background: rgba(0, 229, 193, 0.12);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.card-body h3 { font-size: 1.1rem; margin: 0 0 10px; line-height: 1.4; }
.card-body p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  flex: 1;
  margin-bottom: 14px;
  line-height: 1.7;
}
.card-date {
  color: var(--color-muted);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 6px;
}
.related-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 36px;
  flex-wrap: wrap;
}

/* ===== 文章 CTA ===== */
.article-cta {
  padding: 56px 0 72px;
}
.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding: 36px 40px;
  background: linear-gradient(120deg, rgba(30, 91, 255, 0.18), rgba(0, 229, 193, 0.10)), rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-stroke);
  border-radius: var(--radius-card);
  backdrop-filter: blur(18px);
}
.cta-text h2 { font-size: 1.4rem; margin: 0 0 8px; line-height: 1.4; }
.cta-text p { color: var(--color-text-secondary); margin: 0; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-stroke);
  padding: 56px 24px 24px;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}
.footer-brand .brand-name { font-weight: 700; font-size: 1.1rem; }
.footer-brand p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin: 12px 0 0;
  max-width: 360px;
  line-height: 1.7;
}
.footer-title { font-size: 0.95rem; margin: 0 0 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s, transform 0.2s;
  width: fit-content;
}
.footer-links a:hover { color: var(--color-accent); transform: translateX(3px); }
.footer-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}
.footer-contact li { display: flex; gap: 10px; align-items: center; }
.footer-contact i { color: var(--color-accent); width: 16px; text-align: center; }
.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--color-stroke);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--color-muted);
  font-size: 0.8rem;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) and (min-width: 768px) {
  .side-panel { width: 72px; padding: 24px 10px; }
  .side-panel .brand-text { display: none; }
  .side-brand { justify-content: center; padding: 0 0 20px; }
  .nav-link { justify-content: center; padding: 14px 0; }
  .nav-link span { display: none; }
  .side-foot { text-align: center; font-size: 0.65rem; }
  .main-wrap { margin-left: 72px; }
}
@media (max-width: 767px) {
  .main-wrap { margin-left: 0; }
  .side-panel {
    transform: translateX(-100%);
    visibility: hidden;
    width: 280px;
    transition: transform 0.3s ease, visibility 0.3s;
  }
  .side-panel.open { transform: translateX(0); visibility: visible; }
  .side-panel .brand-text { display: flex; }
  .side-nav .nav-link span { display: inline; }
  .top-bar { display: flex; }
  .side-overlay { display: block; }
  .article-hero { padding: 48px 0 40px; }
  .article-layout { padding: 32px 0 48px; }
  .related-section { padding: 48px 0 56px; }
  .cta-box { flex-direction: column; align-items: flex-start; padding: 28px 24px; }
  .related-actions { flex-direction: column; align-items: stretch; }
  .related-actions .btn { width: 100%; }
  .article-cta .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .article-hero h1 { font-size: 1.5rem; }
  .related-grid { flex-direction: column; }
  .cta-box { padding: 24px 18px; }
  .btn { width: 100%; justify-content: center; }
}