/* roulang page: index */
:root {
  --bg-deep: #050818;
  --bg-panel: #0a132d;
  --bg-card: rgba(12, 22, 48, 0.66);
  --primary: #2f8fff;
  --highlight: #4fb7ff;
  --cyan: #21e3ff;
  --magenta: #ff3d7f;
  --gold: #ffc46b;
  --text-main: #eef4ff;
  --text-secondary: #96a8c7;
  --text-muted: #5a6f92;
  --line: rgba(150, 170, 210, 0.12);
  --glow-blue: rgba(47, 143, 255, 0.35);
  --glow-cyan: rgba(33, 227, 255, 0.25);
  --glow-gold: rgba(255, 196, 107, 0.35);
  --font-mono: 'Roboto Mono', 'JetBrains Mono', Consolas, monospace;
  --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(rgba(33, 227, 255, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

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

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

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

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

.container {
  max-width: 80rem;
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
  position: relative;
  z-index: 2;
}

@media (min-width: 768px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

.mono {
  font-family: var(--font-mono);
}

/* ===== 按钮系统 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #163a7a 0%, var(--primary) 48%, var(--cyan) 100%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #ffffff;
  box-shadow: 0 0 20px var(--glow-blue), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--glow-blue), 0 8px 28px rgba(47, 143, 255, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.16);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(-1px);
  opacity: 0.9;
  box-shadow: 0 0 16px rgba(47, 143, 255, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.btn-ghost {
  background: rgba(47, 143, 255, 0.08);
  border: 1px solid rgba(110, 160, 255, 0.28);
  color: var(--text-main);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(47, 143, 255, 0.16);
  border-color: rgba(79, 183, 255, 0.5);
  color: var(--highlight);
  box-shadow: 0 0 12px rgba(47, 143, 255, 0.12);
}

.btn-sm {
  padding: 0.45rem 1.15rem;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 0.9rem 2.4rem;
  font-size: 1.05rem;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.25s;
}

.text-link:hover {
  color: var(--highlight);
}

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

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

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 100;
  background: transparent;
  transition: background 0.35s, border-color 0.35s, box-shadow 0.35s, backdrop-filter 0.35s;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(5, 8, 24, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-icon {
  width: 32px;
  height: 32px;
  color: var(--text-main);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-main);
  white-space: nowrap;
}

.brand-text small {
  font-size: 0.62rem;
  color: var(--cyan);
  letter-spacing: 0.18em;
  font-weight: 500;
}

.channel-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link {
  position: relative;
  padding: 0.35rem 0.25rem;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.25s;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  border-radius: 2px;
  transition: transform 0.3s;
  box-shadow: 0 0 8px rgba(33, 227, 255, 0.6);
}

.nav-link:hover {
  color: var(--text-main);
}

.nav-link:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-link.active {
  color: var(--text-main);
}

.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.search-toggle {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border: 1px solid rgba(150, 170, 210, 0.16);
  background: rgba(255, 255, 255, 0.03);
  transition: all 0.25s;
}

.search-toggle:hover {
  color: var(--cyan);
  border-color: rgba(33, 227, 255, 0.4);
  background: rgba(33, 227, 255, 0.06);
}

.nav-cta {
  display: none;
}

.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 8px;
  border-radius: 10px;
  border: 1px solid rgba(150, 170, 210, 0.16);
  background: rgba(255, 255, 255, 0.03);
}

.mobile-menu-btn span {
  display: block;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all 0.3s;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 768px) {
  .nav-cta {
    display: inline-flex;
  }
  .mobile-menu-btn {
    display: none;
  }
}

/* 移动端抽屉 */
.mobile-drawer {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(5, 8, 24, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  padding: 1.5rem 2rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  transform: translateY(-12px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s ease;
}

.mobile-drawer.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.drawer-link {
  display: block;
  padding: 0.9rem 0;
  color: var(--text-secondary);
  font-size: 1rem;
  border-bottom: 1px solid rgba(150, 170, 210, 0.1);
}

.drawer-link.active {
  color: var(--text-main);
}

.drawer-cta {
  margin-top: 1.5rem;
  width: 100%;
}

/* 搜索浮层 */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 120;
  background: rgba(5, 8, 24, 0.65);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 110px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.search-overlay.open {
  opacity: 1;
  visibility: visible;
}

.search-dialog {
  width: min(560px, 90%);
  background: rgba(10, 19, 45, 0.92);
  border: 1px solid rgba(110, 160, 255, 0.22);
  border-radius: 16px;
  padding: 1.25rem;
  display: flex;
  gap: 0.75rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(16px);
}

.search-dialog input {
  flex: 1;
  background: rgba(255, 255, 255, 0.04);
  border: none;
  border-bottom: 1px solid rgba(150, 170, 210, 0.2);
  padding: 0.7rem 0.4rem;
  color: var(--text-main);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search-dialog input:focus {
  border-bottom-color: var(--cyan);
  box-shadow: 0 4px 12px rgba(33, 227, 255, 0.18);
}

.search-dialog input::placeholder {
  color: var(--text-muted);
}

.search-dialog .btn {
  flex-shrink: 0;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 64px;
}

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

.hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(5, 8, 24, 0.96) 0%, rgba(5, 8, 24, 0.88) 34%, rgba(5, 8, 24, 0.4) 70%, rgba(5, 8, 24, 0.62) 100%);
  z-index: 1;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
  padding-top: 2.5rem;
  padding-bottom: 3rem;
}

@media (min-width: 1024px) {
  .hero-inner {
    grid-template-columns: 40% 60%;
    gap: 0;
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 560px;
}

.hero-flag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  background: rgba(33, 227, 255, 0.08);
  border: 1px solid rgba(33, 227, 255, 0.22);
  color: var(--cyan);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

.hero-flag::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-main);
  text-shadow: 0 0 30px rgba(47, 143, 255, 0.35);
  margin-bottom: 1.1rem;
}

.hero-sub {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 2rem;
  max-width: 32rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2.25rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.25rem;
}

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

.hero-stats .stat-num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.hero-stats .stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

@media (max-width: 767px) {
  .hero {
    min-height: auto;
    padding-bottom: 3rem;
  }
  .hero-stats {
    gap: 1rem 1.5rem;
  }
  .hero-stats .stat-num {
    font-size: 1.15rem;
  }
}

/* Hero 视觉装饰 */
.hero-visual {
  position: relative;
  z-index: 2;
  display: none;
  min-height: 560px;
}

@media (min-width: 1024px) {
  .hero-visual {
    display: block;
  }
}

.arena-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(110, 160, 255, 0.25);
  box-shadow: 0 0 50px rgba(47, 143, 255, 0.12), inset 0 0 50px rgba(47, 143, 255, 0.06);
}

.arena-ring::before {
  content: "";
  position: absolute;
  inset: -40px;
  border-radius: 50%;
  border: 1px dashed rgba(33, 227, 255, 0.15);
}

.arena-ring::after {
  content: "";
  position: absolute;
  inset: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.orbit-line {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-18deg);
  width: 620px;
  height: 240px;
  border-radius: 50%;
  border: 1px solid rgba(33, 227, 255, 0.2);
  border-bottom-color: transparent;
  border-left-color: transparent;
  pointer-events: none;
}

.orbit-line::after {
  content: "";
  position: absolute;
  top: 24%;
  right: 6%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 18px var(--cyan), 0 0 36px rgba(33, 227, 255, 0.5);
}

.speed-lines {
  position: absolute;
  top: 12%;
  right: 6%;
  width: 220px;
  height: 120px;
  background: repeating-linear-gradient(115deg, transparent 0 12px, rgba(79, 183, 255, 0.14) 13px 14px, transparent 15px 28px);
  transform: rotate(-8deg);
  mask-image: radial-gradient(ellipse, rgba(0, 0, 0, 0.8) 30%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse, rgba(0, 0, 0, 0.8) 30%, transparent 72%);
}

.star-dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.7) 1px, transparent 1px), radial-gradient(rgba(79, 183, 255, 0.6) 1px, transparent 1px);
  background-size: 120px 120px, 180px 180px;
  background-position: 0 0, 60px 80px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse, rgba(0, 0, 0, 0.8) 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse, rgba(0, 0, 0, 0.8) 20%, transparent 70%);
}

.scroll-hint {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: none;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  z-index: 5;
}

@media (min-width: 1024px) {
  .scroll-hint {
    display: flex;
  }
}

.mouse-icon {
  width: 18px;
  height: 28px;
  border: 1.5px solid var(--text-muted);
  border-radius: 10px;
  position: relative;
}

.mouse-icon::after {
  content: "";
  position: absolute;
  top: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 6px;
  border-radius: 2px;
  background: var(--cyan);
  animation: scrollDot 1.8s infinite;
}

@keyframes scrollDot {
  0% { transform: translateX(-50%) translateY(0); opacity: 1; }
  70% { transform: translateX(-50%) translateY(10px); opacity: 0; }
  100% { transform: translateX(-50%) translateY(0); opacity: 0; }
}

/* ===== 通用板块 ===== */
.section {
  position: relative;
  padding: 4.5rem 0;
}

@media (min-width: 768px) {
  .section {
    padding: 6rem 0;
  }
}

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.25rem;
}

.section-head h2 {
  font-size: clamp(1.6rem, 2.5vw, 2.15rem);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.section-head.split {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  text-align: left;
  max-width: none;
  margin-bottom: 2.5rem;
}

.section-head.split h2 {
  margin-bottom: 0.35rem;
}

/* ===== 玩法时间线 ===== */
.play-section {
  background: var(--bg-panel);
  position: relative;
  overflow: hidden;
}

.play-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(110, 160, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(110, 160, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.play-section::after {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 1px solid rgba(79, 183, 255, 0.08);
  box-shadow: 0 0 80px rgba(47, 143, 255, 0.06);
  pointer-events: none;
}

.play-timeline {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
}

@media (min-width: 768px) {
  .play-timeline {
    flex-direction: row;
    align-items: flex-start;
    gap: 0;
  }
}

.play-step {
  flex: 1;
  padding: 1.5rem 1.25rem 1.75rem;
  text-align: center;
  position: relative;
}

@media (min-width: 768px) {
  .play-step {
    padding: 1.5rem 1rem 1.75rem;
  }
}

.play-step .step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(79, 183, 255, 0.5);
  line-height: 1;
  margin-bottom: 1.1rem;
}

.play-step .step-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 1rem;
  color: var(--cyan);
  opacity: 0.85;
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-step h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.play-step p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 200px;
  margin: 0 auto;
}

.step-line {
  display: none;
}

@media (min-width: 768px) {
  .step-line {
    display: block;
    flex: 0 0 40px;
    height: 1px;
    background: linear-gradient(90deg, var(--primary), var(--cyan));
    position: relative;
    top: 94px;
    transform: scaleX(0.9);
  }
  .step-line::after {
    content: "";
    position: absolute;
    right: -2px;
    top: -2px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 8px var(--cyan);
  }
}

@media (max-width: 767px) {
  .play-step {
    border-left: 1px solid rgba(33, 227, 255, 0.2);
    text-align: left;
    padding: 0.5rem 0 2rem 1.5rem;
    margin-left: 1.25rem;
  }
  .play-step::before {
    content: "";
    position: absolute;
    left: -5px;
    top: 8px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 10px rgba(33, 227, 255, 0.5);
  }
  .play-step .step-icon {
    margin: 0 0 0.75rem;
  }
  .play-step p {
    margin: 0;
  }
}

/* ===== 奖励预览 ===== */
.reward-section {
  position: relative;
  overflow: hidden;
}

.reward-section::before {
  content: "";
  position: absolute;
  top: 15%;
  left: -50px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 143, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.reward-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 1024px) {
  .reward-layout {
    grid-template-columns: 5fr 6fr;
    gap: 1.75rem;
  }
}

.reward-main {
  position: relative;
  background: var(--bg-card);
  border: 1px solid rgba(255, 196, 107, 0.4);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
  transition: all 0.35s;
  box-shadow: 0 0 28px rgba(255, 196, 107, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.reward-main::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.reward-main:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 42px rgba(255, 196, 107, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.reward-img {
  width: 100%;
  height: 220px;
  border-radius: 12px;
  overflow: hidden;
  margin: 1rem 0;
}

.reward-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.reward-main:hover .reward-img img {
  transform: scale(1.04);
}

.reward-main h3 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.reward-main > p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.reward-data {
  display: flex;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--gold);
  font-weight: 600;
}

.reward-side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .reward-side {
    grid-template-columns: 1fr 1fr;
  }
}

.reward-item {
  background: var(--bg-card);
  border: 1px solid rgba(110, 160, 255, 0.14);
  border-radius: 14px;
  padding: 1.1rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  gap: 0.85rem;
  align-items: center;
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}

.reward-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.reward-item:hover {
  transform: translateY(-3px);
  border-color: rgba(110, 160, 255, 0.3);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.reward-thumb {
  width: 62px;
  height: 62px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
}

.reward-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.reward-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.reward-info h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

.reward-info .mono {
  font-size: 0.82rem;
  color: var(--gold);
  font-weight: 600;
}

.rare-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(255, 196, 107, 0.18), rgba(255, 61, 127, 0.12));
  border: 1px solid rgba(255, 196, 107, 0.35);
  color: var(--gold);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  align-self: flex-start;
}

.rare-tag.small {
  padding: 0.12rem 0.55rem;
  font-size: 0.62rem;
  background: rgba(33, 227, 255, 0.1);
  border-color: rgba(33, 227, 255, 0.3);
  color: var(--cyan);
}

/* ===== 任务打卡 ===== */
.mission-section {
  background: var(--bg-panel);
  position: relative;
  overflow: hidden;
}

.mission-section::after {
  content: "";
  position: absolute;
  top: -100px;
  left: -60px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(33, 227, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.mission-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .mission-layout {
    grid-template-columns: 7fr 5fr;
    gap: 2.5rem;
    align-items: start;
  }
}

.mission-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.mission-item {
  background: rgba(13, 23, 48, 0.85);
  border: 1px solid rgba(110, 160, 255, 0.1);
  border-radius: 14px;
  padding: 1.15rem 1.35rem;
  transition: border-color 0.3s, background 0.3s;
}

.mission-item:hover {
  border-color: rgba(110, 160, 255, 0.3);
  background: rgba(13, 23, 48, 0.95);
}

.mission-info {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.65rem;
}

.mission-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.15rem;
}

.mission-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.reward-badge {
  flex-shrink: 0;
  display: inline-flex;
  padding: 0.2rem 0.65rem;
  border-radius: 8px;
  background: rgba(255, 196, 107, 0.1);
  border: 1px solid rgba(255, 196, 107, 0.25);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
}

.progress-track {
  height: 4px;
  background: rgba(150, 170, 210, 0.12);
  border-radius: 4px;
  overflow: visible;
  position: relative;
  margin-top: 0.75rem;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  position: relative;
  transition: width 0.6s ease;
}

.progress-fill::after {
  content: "";
  position: absolute;
  right: -3px;
  top: -2.5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.progress-num {
  display: inline-block;
  margin-top: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.mission-list .btn {
  margin-top: 1.1rem;
  align-self: flex-start;
}

/* 右侧进度面板 */
.progress-panel {
  background: var(--bg-card);
  border: 1px solid rgba(110, 160, 255, 0.18);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  text-align: center;
  position: sticky;
  top: 90px;
  overflow: hidden;
}

.progress-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.14), transparent);
}

.progress-ring {
  position: relative;
  width: 150px;
  height: 150px;
  margin: 0 auto 1.25rem;
}

.progress-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: rgba(150, 170, 210, 0.15);
  stroke-width: 8;
}

.ring-fg {
  fill: none;
  stroke: url(#ringGradient);
  stroke: var(--cyan);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 251.2;
  stroke-dashoffset: 75;
  filter: drop-shadow(0 0 6px rgba(33, 227, 255, 0.4));
}

.ring-num {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1;
}

.ring-num::after {
  content: "%";
  font-size: 1rem;
  color: var(--text-muted);
}

.ring-stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
  border-top: 1px solid var(--line);
  padding-top: 1.1rem;
}

.ring-stats > div {
  display: flex;
  flex-direction: column;
  font-size: 0.72rem;
  color: var(--text-muted);
  gap: 0.1rem;
}

.ring-stats .mono {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
}

/* ===== 资讯区 ===== */
.news-section {
  position: relative;
}

.news-section::before {
  content: "";
  position: absolute;
  top: 8%;
  right: -30px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(255, 61, 127, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.news-feature-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid rgba(110, 160, 255, 0.16);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  margin-bottom: 1.5rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.news-feature-card:hover {
  border-color: rgba(110, 160, 255, 0.34);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.28);
}

@media (min-width: 768px) {
  .news-feature-card {
    grid-template-columns: 1.1fr 1fr;
  }
}

.feature-img-wrap {
  height: 220px;
  overflow: hidden;
  position: relative;
}

@media (min-width: 768px) {
  .feature-img-wrap {
    height: auto;
    min-height: 240px;
  }
}

.feature-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-img-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(5, 8, 24, 0.1) 0%, rgba(5, 8, 24, 0.35) 100%);
}

.feature-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.feature-content .category-tag {
  align-self: flex-start;
  margin-bottom: 0.75rem;
}

.feature-content h3 {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.65rem;
  line-height: 1.4;
}

.feature-content p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 1.1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.news-meta time {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--highlight);
  font-size: 0.84rem;
  font-weight: 500;
  transition: color 0.25s;
}

.link-more:hover {
  color: var(--cyan);
}

.link-more i {
  font-size: 0.72rem;
  transition: transform 0.25s;
}

.link-more:hover i {
  transform: translateX(3px);
}

.news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .news-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

.news-card {
  background: var(--bg-card);
  border: 1px solid rgba(110, 160, 255, 0.14);
  border-radius: 14px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.3s;
  position: relative;
}

.news-card:hover {
  transform: translateY(-3px);
  border-color: rgba(110, 160, 255, 0.3);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.25);
}

.card-link {
  display: block;
  padding: 1.1rem 1.25rem 1.35rem;
}

.card-thumb {
  display: block;
  height: 180px;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 1rem;
  position: relative;
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.news-card:hover .card-thumb img {
  transform: scale(1.05);
}

.news-card .category-tag {
  margin-bottom: 0.6rem;
}

.news-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

.news-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.6rem;
}

.news-card time {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.category-tag {
  display: inline-flex;
  padding: 0.18rem 0.7rem;
  border-radius: 999px;
  background: rgba(33, 227, 255, 0.08);
  border: 1px solid rgba(33, 227, 255, 0.2);
  color: var(--cyan);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.empty-state {
  background: var(--bg-card);
  border: 1px dashed rgba(110, 160, 255, 0.25);
  border-radius: 14px;
  padding: 2.5rem 2rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  backdrop-filter: blur(10px);
}

/* ===== 合作伙伴 ===== */
.partner-section {
  background: var(--bg-panel);
  position: relative;
  overflow: hidden;
}

.partner-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(110, 160, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.partner-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  max-width: 900px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .partner-row {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }
}

.partner-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 1.6rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(150, 170, 210, 0.1);
  border-radius: 14px;
  color: rgba(238, 244, 255, 0.55);
  transition: all 0.3s;
  cursor: default;
}

.partner-logo:hover {
  color: var(--text-main);
  border-color: rgba(110, 160, 255, 0.3);
  background: rgba(110, 160, 255, 0.04);
}

.partner-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: currentColor;
  opacity: 0.8;
}

.partner-logo span:last-child {
  font-size: 0.82rem;
  font-weight: 500;
}

/* ===== 全局 CTA ===== */
.cta-banner {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  padding: 4rem 2rem;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid rgba(110, 160, 255, 0.2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

@media (min-width: 768px) {
  .cta-banner {
    padding: 5rem 3rem;
  }
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  z-index: 0;
}

.cta-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(5, 8, 24, 0.9) 0%, rgba(10, 19, 45, 0.75) 60%, rgba(5, 8, 24, 0.82) 100%);
  z-index: 0;
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.cta-inner p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.cta-banner .light-left,
.cta-banner .light-right {
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  filter: blur(60px);
  z-index: 1;
  pointer-events: none;
}

.cta-banner .light-left {
  left: -60px;
  bottom: -60px;
  background: rgba(47, 143, 255, 0.14);
}

.cta-banner .light-right {
  right: -40px;
  top: -40px;
  background: rgba(33, 227, 255, 0.1);
}

.cta-banner .btn-primary {
  animation: breathe 3.5s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { box-shadow: 0 0 20px var(--glow-blue), inset 0 1px 0 rgba(255, 255, 255, 0.12); }
  50% { box-shadow: 0 0 34px var(--glow-blue), 0 0 60px rgba(33, 227, 255, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.16); }
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(110, 160, 255, 0.14);
  border-radius: 14px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.faq-item.open {
  border-color: rgba(33, 227, 255, 0.3);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 1.35rem;
  width: 100%;
  text-align: left;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-main);
  transition: color 0.3s;
}

.faq-q:hover {
  color: var(--cyan);
}

.faq-q i {
  color: var(--text-muted);
  transition: transform 0.3s;
  font-size: 0.8rem;
}

.faq-item.open .faq-q {
  color: var(--cyan);
}

.faq-item.open .faq-q i {
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
  padding: 0 1.35rem;
}

.faq-item.open .faq-a {
  max-height: 300px;
  opacity: 1;
  padding-bottom: 1.2rem;
}

.faq-a p {
  color: var(--text-secondary);
  font-size: 0.86rem;
  line-height: 1.75;
  border-left: 3px solid var(--cyan);
  padding-left: 0.85rem;
  background: rgba(33, 227, 255, 0.03);
  border-radius: 0 8px 8px 0;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #030612;
  border-top: 1px solid var(--line);
  padding: 3.5rem 0 0;
  margin-top: 5rem;
}

@media (min-width: 768px) {
  .site-footer {
    margin-top: 6rem;
  }
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
  padding-bottom: 2.5rem;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 4fr 2fr 3fr 2fr;
    gap: 3rem;
  }
}

.footer-brand .brand {
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 260px;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.footer-col ul a {
  color: var(--text-muted);
  font-size: 0.82rem;
  transition: color 0.25s;
}

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

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.footer-contact i {
  color: var(--text-muted);
  width: 18px;
  text-align: center;
  font-size: 0.78rem;
}

.footer-social {
  display: flex;
  gap: 0.6rem;
}

.footer-social a {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(150, 170, 210, 0.14);
  color: var(--text-muted);
  font-size: 0.82rem;
  transition: all 0.25s;
}

.footer-social a:hover {
  color: var(--cyan);
  border-color: rgba(33, 227, 255, 0.4);
  background: rgba(33, 227, 255, 0.04);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-bottom p {
  font-size: 0.76rem;
  color: var(--text-muted);
}

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

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

/* ===== 响应式通用 ===== */
@media (max-width: 520px) {
  .brand-text small {
    display: none;
  }
  .section-head h2 {
    font-size: 1.4rem;
  }
  .feature-content h3 {
    font-size: 1.1rem;
  }
  .mission-info {
    flex-direction: column;
  }
  .reward-badge {
    align-self: flex-start;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 399px) {
  .nav-container {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
  }
  .brand-text strong {
    font-size: 0.9rem;
  }
}

/* roulang page: category1 */
:root {
      --bg-deep: #050818;
      --bg-panel: #0a132d;
      --glass-bg: rgba(12, 22, 48, 0.66);
      --glass-border: rgba(110, 160, 255, 0.16);
      --primary: #2f8fff;
      --highlight: #4fb7ff;
      --cyan: #21e3ff;
      --magenta: #ff3d7f;
      --gold: #ffc46b;
      --text-main: #eef4ff;
      --text-sub: #96a8c7;
      --text-dim: #5a6f92;
      --success: #22e584;
      --warn: #ff9f43;
      --danger: #ff5d5d;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 8px 24px rgba(1, 4, 20, 0.4);
      --shadow-glow: 0 0 24px rgba(47, 143, 255, 0.35);
      --border-line: rgba(150, 170, 210, 0.12);
      --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-mono: "Roboto Mono", "JetBrains Mono", "Consolas", monospace;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 88px;
    }

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

    img {
      max-width: 100%;
      display: block;
      border-radius: var(--radius-md);
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
    }

    ul, ol {
      list-style: none;
    }

    button, input {
      font-family: inherit;
    }

    a:focus-visible, button:focus-visible {
      outline: 2px solid var(--cyan);
      outline-offset: 3px;
      border-radius: 4px;
    }

    .container {
      max-width: 80rem;
      margin: 0 auto;
      padding: 0 2rem;
    }

    .mono {
      font-family: var(--font-mono);
    }

    /* ====== Header / Nav ====== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      height: 64px;
      display: flex;
      align-items: center;
      background: rgba(5, 8, 24, 0.62);
      border-bottom: 1px solid transparent;
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .site-header.is-scrolled {
      background: rgba(8, 14, 32, 0.9);
      border-bottom: 1px solid var(--glass-border);
      box-shadow: 0 10px 30px rgba(1, 4, 20, 0.35);
    }

    .header-inner {
      width: 100%;
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 2rem;
    }

    .header-left {
      display: flex;
      align-items: center;
      gap: 2.4rem;
      min-width: 0;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      flex-shrink: 0;
    }

    .brand-icon {
      width: 34px;
      height: 34px;
      color: var(--text-main);
      flex-shrink: 0;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.15;
      white-space: nowrap;
    }

    .brand-text strong {
      font-size: 1.05rem;
      font-weight: 700;
      letter-spacing: 0.02em;
    }

    .brand-text small {
      font-size: 0.68rem;
      color: var(--text-sub);
      letter-spacing: 0.14em;
      margin-top: 1px;
    }

    .channel-nav {
      display: flex;
      align-items: center;
      gap: 0.25rem;
    }

    .nav-link {
      position: relative;
      display: inline-block;
      padding: 0.5rem 0.85rem;
      color: var(--text-sub);
      font-size: 0.925rem;
      font-weight: 500;
      border-radius: 6px;
      transition: color 0.25s;
    }

    .nav-link:hover {
      color: var(--text-main);
    }

    .nav-link.active {
      color: var(--text-main);
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      left: 0.85rem;
      right: 0.85rem;
      bottom: 2px;
      height: 2px;
      border-radius: 2px;
      background: linear-gradient(90deg, var(--primary), var(--cyan));
      box-shadow: 0 0 10px rgba(33, 227, 255, 0.55);
    }

    .header-right {
      display: flex;
      align-items: center;
      gap: 0.9rem;
      flex-shrink: 0;
    }

    .header-search {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border: 1px solid rgba(110, 160, 255, 0.2);
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-sub);
      cursor: pointer;
      transition: all 0.25s;
    }

    .header-search:hover {
      color: var(--cyan);
      border-color: rgba(33, 227, 255, 0.5);
      box-shadow: 0 0 12px rgba(33, 227, 255, 0.12);
    }

    .header-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.45rem 1.25rem;
      border-radius: 999px;
      background: linear-gradient(135deg, #1a4fd0, var(--primary), var(--cyan));
      color: #fff;
      font-size: 0.875rem;
      font-weight: 600;
      line-height: 1.5;
      white-space: nowrap;
      box-shadow: 0 0 18px rgba(47, 143, 255, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.18);
      transition: all 0.3s;
    }

    .header-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 28px rgba(47, 143, 255, 0.5);
    }

    .header-cta:active {
      transform: translateY(0);
      opacity: 0.9;
    }

    .mobile-toggle {
      display: none;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border: 1px solid rgba(110, 160, 255, 0.2);
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-sub);
      font-size: 1rem;
      cursor: pointer;
      transition: all 0.25s;
    }

    .mobile-toggle:hover {
      color: var(--cyan);
      border-color: rgba(33, 227, 255, 0.4);
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      z-index: 99;
      background: rgba(8, 14, 32, 0.97);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      padding: 1rem 1.5rem 1.5rem;
      border-bottom: 1px solid var(--glass-border);
      transform: translateY(-110%);
      transition: transform 0.32s ease;
    }

    .mobile-menu.open {
      transform: translateY(0);
    }

    .mobile-menu .nav-link {
      display: block;
      padding: 0.85rem 0.4rem;
      border-bottom: 1px solid var(--border-line);
      font-size: 1rem;
      color: var(--text-sub);
    }

    .mobile-menu .nav-link.active {
      color: var(--text-main);
    }

    .mobile-menu .nav-link.active::after {
      display: none;
    }

    .mobile-menu .header-cta {
      width: 100%;
      margin-top: 1rem;
      padding: 0.75rem;
    }

    /* ====== Search Overlay ====== */
    .search-overlay {
      position: fixed;
      inset: 0;
      background: rgba(3, 6, 18, 0.78);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      z-index: 210;
      display: none;
      align-items: flex-start;
      justify-content: center;
      padding: 100px 1rem 0;
    }

    .search-overlay.open {
      display: flex;
    }

    .search-panel {
      width: 100%;
      max-width: 540px;
      background: rgba(12, 22, 48, 0.94);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 1rem;
      display: flex;
      gap: 0.75rem;
      box-shadow: 0 16px 48px rgba(1, 4, 20, 0.6);
      position: relative;
      overflow: hidden;
    }

    .search-panel::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
    }

    .search-panel input {
      flex: 1;
      min-width: 0;
      background: rgba(255, 255, 255, 0.04);
      border: none;
      border-bottom: 1px solid rgba(150, 170, 210, 0.3);
      padding: 0.6rem 0.75rem;
      color: var(--text-main);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.3s, box-shadow 0.3s;
    }

    .search-panel input:focus {
      border-color: var(--cyan);
      box-shadow: 0 4px 12px rgba(33, 227, 255, 0.14);
    }

    .search-panel input::placeholder {
      color: var(--text-dim);
    }

    .search-submit {
      padding: 0.6rem 1.5rem;
      border-radius: 999px;
      background: linear-gradient(135deg, var(--primary), var(--cyan));
      color: #fff;
      font-size: 0.9rem;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all 0.3s;
      flex-shrink: 0;
    }

    .search-submit:hover {
      box-shadow: 0 0 20px rgba(47, 143, 255, 0.5);
      transform: translateY(-1px);
    }

    /* ====== Category Hero ====== */
    .cat-hero {
      position: relative;
      min-height: 320px;
      display: flex;
      align-items: center;
      padding: 104px 0 64px;
      overflow: hidden;
      background-color: var(--bg-panel);
    }

    .cat-hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      opacity: 0.5;
    }

    .cat-hero-bg::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(105deg, rgba(5, 8, 24, 0.95) 30%, rgba(10, 19, 45, 0.75) 70%, rgba(5, 8, 24, 0.55));
    }

    .cat-hero-content {
      position: relative;
      z-index: 2;
      max-width: 720px;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.5rem;
      font-size: 0.875rem;
      color: var(--text-dim);
      margin-bottom: 1.1rem;
    }

    .breadcrumb a {
      color: var(--text-sub);
      transition: color 0.25s;
    }

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

    .breadcrumb .sep {
      color: var(--text-dim);
      opacity: 0.6;
    }

    .breadcrumb .current {
      color: var(--text-main);
      font-weight: 500;
    }

    .cat-hero h1 {
      font-size: clamp(2.1rem, 4vw, 3.1rem);
      font-weight: 800;
      line-height: 1.18;
      margin-bottom: 0.85rem;
      letter-spacing: -0.01em;
      text-shadow: 0 0 32px rgba(79, 183, 255, 0.3);
    }

    .cat-hero p {
      font-size: 1.04rem;
      color: var(--text-sub);
      line-height: 1.75;
      max-width: 600px;
    }

    .cat-hero-num {
      position: absolute;
      right: 3%;
      bottom: -30px;
      font-family: var(--font-mono);
      font-size: clamp(120px, 18vw, 220px);
      font-weight: 800;
      color: rgba(110, 160, 255, 0.1);
      line-height: 1;
      z-index: 1;
      pointer-events: none;
      user-select: none;
    }

    /* ====== Anchor Nav ====== */
    .anchor-wrap {
      position: relative;
      z-index: 6;
      margin-top: -26px;
    }

    .anchor-nav {
      display: flex;
      flex-wrap: wrap;
      gap: 0.7rem;
      background: rgba(12, 22, 48, 0.7);
      border: 1px solid var(--glass-border);
      border-radius: 999px;
      padding: 0.45rem;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      width: fit-content;
      max-width: 100%;
    }

    .anchor-item {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.5rem 1.2rem;
      border-radius: 999px;
      color: var(--text-sub);
      font-size: 0.875rem;
      font-weight: 500;
      white-space: nowrap;
      transition: all 0.25s;
    }

    .anchor-item:hover {
      color: var(--cyan);
      background: rgba(33, 227, 255, 0.06);
    }

    .anchor-item.active {
      color: #fff;
      background: linear-gradient(135deg, rgba(47, 143, 255, 0.25), rgba(33, 227, 255, 0.18));
      border: 1px solid rgba(33, 227, 255, 0.3);
    }

    /* ====== Section / Common ====== */
    .section {
      padding: 84px 0;
    }

    .section-head {
      margin-bottom: 3rem;
    }

    .section-head.center {
      text-align: center;
    }

    .section-head.center p {
      margin-left: auto;
      margin-right: auto;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      font-family: var(--font-mono);
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--cyan);
      letter-spacing: 0.12em;
      text-transform: uppercase;
      margin-bottom: 0.55rem;
    }

    .eyebrow::before {
      content: '';
      width: 18px;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--cyan));
    }

    .section-head h2 {
      font-size: 1.85rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 0.5rem;
      letter-spacing: -0.01em;
    }

    .section-head p {
      color: var(--text-sub);
      font-size: 1rem;
      line-height: 1.7;
      max-width: 620px;
    }

    .section-alt {
      background: var(--bg-panel);
      position: relative;
      overflow: hidden;
    }

    .section-alt::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(150, 170, 210, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(150, 170, 210, 0.045) 1px, transparent 1px);
      background-size: 52px 52px;
      pointer-events: none;
    }

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

    /* ====== Rules ====== */
    .rules-wrap {
      max-width: 840px;
    }

    .rule-item {
      display: grid;
      grid-template-columns: 76px 1fr;
      gap: 1.6rem;
      padding: 1.9rem 0;
      border-bottom: 1px solid var(--border-line);
      transition: padding-left 0.3s;
    }

    .rule-item:last-child {
      border-bottom: none;
    }

    .rule-item:hover {
      padding-left: 0.35rem;
    }

    .rule-num {
      font-family: var(--font-mono);
      font-size: 1.55rem;
      font-weight: 700;
      line-height: 1.2;
      color: transparent;
      -webkit-text-stroke: 1px rgba(33, 227, 255, 0.55);
    }

    .rule-body h3 {
      font-size: 1.12rem;
      font-weight: 600;
      margin-bottom: 0.3rem;
      color: var(--text-main);
    }

    .rule-body p {
      color: var(--text-sub);
      font-size: 0.95rem;
      line-height: 1.8;
      max-width: 640px;
    }

    /* ====== Steps ====== */
    .steps-grid {
      display: grid;
      grid-template-columns: 1fr 400px;
      gap: 4rem;
      align-items: center;
    }

    .step-list {
      position: relative;
      max-width: 720px;
    }

    .step-item {
      position: relative;
      display: grid;
      grid-template-columns: 72px 1fr;
      gap: 1.4rem;
      padding: 1.35rem 0;
    }

    .step-item::before {
      content: '';
      position: absolute;
      left: 35px;
      top: 0;
      bottom: 1.35rem;
      width: 2px;
      background: linear-gradient(180deg, var(--primary), var(--cyan), transparent);
      opacity: 0.35;
      border-radius: 2px;
    }

    .step-item:first-child::before {
      top: 64px;
    }

    .step-item:last-child::before {
      bottom: auto;
      height: 40px;
    }

    .step-ic {
      position: relative;
      z-index: 2;
      width: 72px;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: rgba(10, 19, 45, 0.94);
      border: 1px solid var(--glass-border);
      color: var(--cyan);
      font-size: 1.4rem;
      box-shadow: 0 0 22px rgba(33, 227, 255, 0.1);
      transition: all 0.3s;
    }

    .step-item:hover .step-ic {
      border-color: rgba(33, 227, 255, 0.5);
      box-shadow: 0 0 28px rgba(33, 227, 255, 0.22);
      transform: scale(1.04);
    }

    .step-tag {
      display: inline-block;
      font-family: var(--font-mono);
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--cyan);
      letter-spacing: 0.14em;
      margin-bottom: 0.2rem;
    }

    .step-content h3 {
      font-size: 1.08rem;
      font-weight: 600;
      margin-bottom: 0.25rem;
    }

    .step-content p {
      color: var(--text-sub);
      font-size: 0.92rem;
      line-height: 1.75;
      max-width: 440px;
    }

    .steps-media {
      position: relative;
    }

    .steps-media::before {
      content: '';
      position: absolute;
      inset: -18px;
      border-radius: 24px;
      background: linear-gradient(145deg, rgba(47, 143, 255, 0.12), rgba(33, 227, 255, 0.05));
      z-index: 0;
    }

    .steps-media img {
      position: relative;
      z-index: 1;
      border-radius: 16px;
      border: 1px solid var(--glass-border);
      box-shadow: 0 20px 46px rgba(1, 4, 20, 0.5);
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* ====== Rewards ====== */
    .reward-grid {
      display: grid;
      grid-template-columns: 1fr 380px;
      gap: 3.2rem;
      align-items: start;
    }

    .tier-list {
      display: grid;
      gap: 0.9rem;
    }

    .tier-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1.05rem 1.4rem;
      background: rgba(12, 22, 48, 0.66);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      transition: all 0.28s;
      position: relative;
      overflow: hidden;
    }

    .tier-item::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
    }

    .tier-item:hover {
      border-color: rgba(33, 227, 255, 0.45);
      transform: translateX(5px);
      box-shadow: 0 0 18px rgba(33, 227, 255, 0.08);
    }

    .tier-item.hot {
      border-color: rgba(255, 196, 107, 0.4);
      background: linear-gradient(135deg, rgba(255, 196, 107, 0.08), rgba(12, 22, 48, 0.66));
    }

    .tier-item.hot:hover {
      border-color: rgba(255, 196, 107, 0.65);
      box-shadow: 0 0 22px rgba(255, 196, 107, 0.12);
    }

    .tier-left {
      display: flex;
      flex-direction: column;
      gap: 0.15rem;
    }

    .tier-name {
      font-weight: 600;
      font-size: 1rem;
      color: var(--text-main);
    }

    .tier-meta {
      font-size: 0.82rem;
      color: var(--text-dim);
    }

    .tier-right {
      text-align: right;
      flex-shrink: 0;
    }

    .tier-pts {
      font-family: var(--font-mono);
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--cyan);
    }

    .tier-item.hot .tier-pts {
      color: var(--gold);
    }

    .tier-badge {
      display: inline-block;
      font-size: 0.68rem;
      padding: 0.18rem 0.55rem;
      border-radius: 999px;
      background: rgba(255, 196, 107, 0.15);
      color: var(--gold);
      border: 1px solid rgba(255, 196, 107, 0.3);
      margin-top: 0.25rem;
    }

    .reward-ring-wrap {
      text-align: center;
      padding: 2.2rem 1.6rem;
      background: rgba(12, 22, 48, 0.7);
      border-radius: var(--radius-lg);
      border: 1px solid var(--glass-border);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      position: sticky;
      top: 96px;
      overflow: hidden;
    }

    .reward-ring-wrap::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    }

    .reward-ring-label {
      font-size: 0.88rem;
      color: var(--text-sub);
      margin-bottom: 1.2rem;
    }

    .reward-ring {
      width: 178px;
      height: 178px;
      border-radius: 50%;
      background: conic-gradient(var(--gold) 0% 76%, rgba(150, 170, 210, 0.14) 76% 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.2rem;
      position: relative;
      box-shadow: 0 0 34px rgba(255, 196, 107, 0.12);
    }

    .reward-ring::before {
      content: '';
      position: absolute;
      inset: 15px;
      border-radius: 50%;
      background: var(--bg-panel);
      border: 1px solid rgba(150, 170, 210, 0.1);
    }

    .reward-ring b {
      position: relative;
      z-index: 2;
      font-family: var(--font-mono);
      font-size: 2.3rem;
      font-weight: 800;
      color: var(--gold);
      line-height: 1;
    }

    .reward-ring-sub {
      font-size: 0.8rem;
      color: var(--text-dim);
      margin-top: 0.35rem;
    }

    .reward-ring-note {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.7;
      max-width: 280px;
      margin: 0 auto;
    }

    /* ====== FAQ ====== */
    .faq-list {
      max-width: 780px;
      margin: 0 auto;
    }

    .faq-item {
      background: rgba(12, 22, 48, 0.66);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      margin-bottom: 0.9rem;
      overflow: hidden;
      position: relative;
      transition: border-color 0.3s, box-shadow 0.3s;
    }

    .faq-item::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
    }

    .faq-item[open] {
      border-left: 3px solid var(--cyan);
      box-shadow: 0 0 24px rgba(33, 227, 255, 0.06);
    }

    .faq-item summary {
      list-style: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1.1rem 1.4rem;
      font-weight: 600;
      font-size: 1rem;
      color: var(--text-main);
      transition: color 0.25s;
      user-select: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary:hover {
      color: var(--highlight);
    }

    .faq-item summary::after {
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      font-size: 0.85rem;
      color: var(--text-dim);
      transition: transform 0.3s, color 0.3s;
      flex-shrink: 0;
    }

    .faq-item[open] summary::after {
      transform: rotate(180deg);
      color: var(--cyan);
    }

    .faq-a {
      padding: 0 1.4rem 1.25rem 1.4rem;
      color: var(--text-sub);
      font-size: 0.95rem;
      line-height: 1.8;
      max-width: 680px;
    }

    /* ====== CTA ====== */
    .cat-cta {
      position: relative;
      padding: 90px 0;
      overflow: hidden;
      background-color: var(--bg-panel);
    }

    .cat-cta-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.36;
    }

    .cat-cta-bg::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(105deg, rgba(5, 8, 24, 0.92), rgba(10, 19, 45, 0.82));
    }

    .cat-cta-bg::after {
      content: '';
      position: absolute;
      width: 320px;
      height: 320px;
      left: -80px;
      top: 50%;
      transform: translateY(-50%);
      background: radial-gradient(circle, rgba(47, 143, 255, 0.16), transparent 70%);
      border-radius: 50%;
    }

    .cat-cta-inner {
      position: relative;
      z-index: 2;
      max-width: 680px;
      margin: 0 auto;
      text-align: center;
      padding: 2.6rem;
      background: rgba(8, 14, 32, 0.72);
      border: 1px solid var(--glass-border);
      border-radius: 20px;
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      overflow: hidden;
    }

    .cat-cta-inner::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
    }

    .cat-cta-inner h2 {
      font-size: 1.9rem;
      font-weight: 700;
      margin-bottom: 0.7rem;
      line-height: 1.3;
    }

    .cat-cta-inner p {
      color: var(--text-sub);
      font-size: 1rem;
      line-height: 1.75;
      margin-bottom: 1.8rem;
      max-width: 520px;
      margin-left: auto;
      margin-right: auto;
    }

    .cta-btns {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.9rem;
      flex-wrap: wrap;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.7rem 1.8rem;
      border-radius: 999px;
      background: linear-gradient(135deg, #1a4fd0, var(--primary), var(--cyan));
      color: #fff;
      font-size: 0.95rem;
      font-weight: 600;
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 0 22px rgba(47, 143, 255, 0.4);
      transition: all 0.3s;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 34px rgba(47, 143, 255, 0.55);
    }

    .btn-primary:active {
      transform: translateY(0);
      opacity: 0.92;
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.7rem 1.6rem;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(110, 160, 255, 0.25);
      color: var(--text-sub);
      font-size: 0.95rem;
      font-weight: 500;
      transition: all 0.3s;
    }

    .btn-ghost:hover {
      color: var(--cyan);
      border-color: rgba(33, 227, 255, 0.5);
      background: rgba(33, 227, 255, 0.06);
      box-shadow: 0 0 14px rgba(33, 227, 255, 0.1);
    }

    /* ====== Footer ====== */
    .site-footer {
      background: #030612;
      padding: 60px 0 0;
      border-top: 1px solid var(--border-line);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.2fr 1fr;
      gap: 2.5rem;
      padding-bottom: 2.6rem;
    }

    .footer-brand .brand {
      margin-bottom: 0.85rem;
    }

    .footer-brand p {
      color: var(--text-dim);
      font-size: 0.87rem;
      line-height: 1.7;
      max-width: 330px;
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 1rem;
    }

    .footer-col ul li {
      margin-bottom: 0.55rem;
    }

    .footer-col ul li a {
      color: var(--text-sub);
      font-size: 0.9rem;
      transition: color 0.25s;
    }

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

    .footer-contact li {
      color: var(--text-sub);
      font-size: 0.875rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }

    .footer-contact li i {
      width: 18px;
      color: var(--text-dim);
      font-size: 0.85rem;
      text-align: center;
    }

    .footer-social {
      display: flex;
      gap: 0.7rem;
    }

    .footer-social a {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 50%;
      border: 1px solid var(--border-line);
      background: rgba(10, 19, 45, 0.5);
      color: var(--text-sub);
      font-size: 1rem;
      transition: all 0.3s;
    }

    .footer-social a:hover {
      color: var(--cyan);
      border-color: rgba(33, 227, 255, 0.5);
      box-shadow: 0 0 14px rgba(33, 227, 255, 0.14);
      transform: translateY(-2px);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 0.6rem;
      padding: 1.3rem 0;
      border-top: 1px solid var(--border-line);
      color: var(--text-dim);
      font-size: 0.8rem;
    }

    .footer-bottom p {
      margin: 0;
    }

    /* ====== Responsive ====== */
    @media (max-width: 1024px) {
      .steps-grid {
        grid-template-columns: 1fr 320px;
        gap: 2.4rem;
      }

      .reward-grid {
        grid-template-columns: 1fr 320px;
        gap: 2.4rem;
      }

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

    @media (max-width: 768px) {
      .container {
        padding: 0 1.25rem;
      }

      .header-left {
        gap: 1rem;
      }

      .channel-nav {
        display: none;
      }

      .header-search {
        display: none;
      }

      .mobile-toggle {
        display: inline-flex;
      }

      .mobile-menu {
        display: block;
      }

      .cat-hero {
        padding: 84px 0 54px;
        min-height: 270px;
      }

      .cat-hero h1 {
        font-size: 1.75rem;
      }

      .cat-hero p {
        font-size: 0.95rem;
      }

      .cat-hero-num {
        font-size: 90px;
        right: -8px;
        bottom: -14px;
      }

      .anchor-wrap {
        margin-top: -20px;
      }

      .anchor-nav {
        border-radius: 16px;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding: 0.4rem;
        -webkit-overflow-scrolling: touch;
      }

      .anchor-item {
        padding: 0.45rem 0.95rem;
        font-size: 0.83rem;
      }

      .section {
        padding: 56px 0;
      }

      .section-head h2 {
        font-size: 1.5rem;
      }

      .section-head p {
        font-size: 0.95rem;
      }

      .rule-item {
        grid-template-columns: 50px 1fr;
        gap: 0.85rem;
        padding: 1.4rem 0;
      }

      .rule-num {
        font-size: 1.2rem;
      }

      .steps-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }

      .steps-media {
        order: -1;
      }

      .steps-media img {
        max-height: 260px;
      }

      .step-item {
        grid-template-columns: 52px 1fr;
        gap: 0.9rem;
        padding: 1.1rem 0;
      }

      .step-item::before {
        left: 25px;
      }

      .step-ic {
        width: 52px;
        height: 52px;
        font-size: 1.1rem;
      }

      .step-item:first-child::before {
        top: 50px;
      }

      .reward-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }

      .reward-ring-wrap {
        position: static;
        padding: 1.8rem 1.2rem;
      }

      .tier-item {
        padding: 0.9rem 1rem;
      }

      .faq-item summary {
        padding: 1rem 1.1rem;
        font-size: 0.95rem;
      }

      .faq-a {
        padding: 0 1.1rem 1.1rem 1.1rem;
        font-size: 0.9rem;
      }

      .cat-cta {
        padding: 60px 0;
      }

      .cat-cta-inner {
        padding: 1.8rem 1.2rem;
      }

      .cat-cta-inner h2 {
        font-size: 1.45rem;
      }

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

      .cta-btns .btn-primary,
      .cta-btns .btn-ghost {
        width: 100%;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 2.2rem;
      }

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

    @media (max-width: 520px) {
      .header-cta {
        display: none;
      }

      .brand-text small {
        display: none;
      }

      .rule-item {
        grid-template-columns: 1fr;
        gap: 0.3rem;
        padding: 1.15rem 0;
      }

      .rule-num {
        margin-bottom: 0.2rem;
        font-size: 1.05rem;
        -webkit-text-stroke: initial;
        color: var(--cyan);
      }

      .step-item {
        grid-template-columns: 1fr;
        gap: 0.2rem;
        padding-left: 0;
      }

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

      .step-ic {
        width: 44px;
        height: 44px;
        font-size: 1rem;
        margin-bottom: 0.5rem;
      }

      .reward-ring {
        width: 148px;
        height: 148px;
      }

      .reward-ring b {
        font-size: 1.9rem;
      }

      .tier-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.35rem;
      }

      .tier-right {
        text-align: left;
      }

      .mobile-menu .nav-link {
        font-size: 0.95rem;
      }
    }

/* roulang page: article */
:root {
            --bg: #050818;
            --bg-alt: #0a132d;
            --panel: rgba(12, 22, 48, 0.66);
            --panel-border: rgba(110, 160, 255, 0.16);
            --primary: #2f8fff;
            --primary-light: #4fb7ff;
            --cyan: #21e3ff;
            --magenta: #ff3d7f;
            --gold: #ffc46b;
            --text: #eef4ff;
            --text-secondary: #96a8c7;
            --text-muted: #5a6f92;
            --success: #22e584;
            --warning: #ff9f43;
            --danger: #ff5d5d;
            --radius-lg: 16px;
            --radius-md: 12px;
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 26px rgba(47, 143, 255, 0.35);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background-color: var(--bg);
            background-image: linear-gradient(rgba(5, 8, 24, 0.86), rgba(5, 8, 24, 0.94)), url('/assets/images/backpic/back-1.png');
            background-repeat: no-repeat;
            background-size: cover;
            background-attachment: fixed;
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            padding-top: 64px;
        }

        body.drawer-open,
        body.search-open {
            overflow: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s;
        }

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

        input {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            z-index: 100;
            display: flex;
            align-items: center;
            background: rgba(5, 8, 24, 0.42);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(150, 170, 210, 0.08);
            transition: background .3s, box-shadow .3s, border-color .3s;
        }

        .site-header.scrolled {
            background: rgba(6, 10, 24, 0.82);
            border-bottom-color: rgba(110, 160, 255, 0.16);
            box-shadow: 0 10px 32px rgba(0, 0, 0, 0.38);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            height: 64px;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 2rem;
            min-width: 0;
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 0.7rem;
            flex-shrink: 0;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 0.65rem;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 34px;
            height: 34px;
            color: var(--text);
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
        }

        .brand-text strong {
            font-size: 1.05rem;
            font-family: 'Roboto Mono', 'JetBrains Mono', Consolas, monospace;
            letter-spacing: 0.02em;
            color: var(--text);
        }

        .brand-text small {
            font-size: 0.68rem;
            color: var(--cyan);
            letter-spacing: 0.38em;
        }

        .channel-nav {
            display: flex;
            align-items: center;
            gap: 1.75rem;
        }

        .nav-link {
            position: relative;
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 0.4rem 0;
            transition: color .25s;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-light), var(--cyan));
            border-radius: 2px;
            transform: translateX(-50%);
            transition: width .25s;
        }

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

        .nav-link:hover::after {
            width: 22px;
        }

        .nav-link.active {
            color: var(--text);
            font-weight: 600;
        }

        .nav-link.active::after {
            width: 30px;
            left: 0;
            transform: none;
            box-shadow: 0 0 8px var(--cyan);
        }

        .icon-btn {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            color: var(--text-secondary);
            border: 1px solid transparent;
            transition: all .25s;
            font-size: 0.92rem;
        }

        .icon-btn:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(110, 160, 255, 0.25);
        }

        .menu-toggle {
            display: none;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.65rem 1.5rem;
            line-height: 1.4;
            transition: transform .25s, box-shadow .25s, background .25s, border-color .25s, opacity .25s;
        }

        .btn-primary {
            background: linear-gradient(135deg, #0b2a66 0%, #2f8fff 50%, #21e3ff 100%);
            border: 1px solid rgba(255, 255, 255, 0.22);
            color: #fff;
            box-shadow: 0 0 18px rgba(47, 143, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(47, 143, 255, 0.5);
        }

        .btn-primary:active {
            transform: translateY(0);
            opacity: 0.9;
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(110, 160, 255, 0.24);
            color: var(--text);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--primary-light);
        }

        .btn-sm {
            padding: 0.45rem 1.1rem;
            font-size: 0.875rem;
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: color .25s;
        }

        .btn-text:hover {
            color: var(--primary-light);
        }

        .btn-text i {
            font-size: 0.8rem;
            transition: transform .25s;
        }

        .btn-text:hover i {
            transform: translateX(4px);
        }

        /* ===== 移动端抽屉 ===== */
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -110%;
            width: min(320px, 86%);
            height: 100vh;
            background: rgba(6, 10, 24, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-left: 1px solid rgba(110, 160, 255, 0.12);
            z-index: 210;
            padding: 1.6rem 1.5rem 2rem;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            transition: right .3s ease;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .drawer-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }

        .drawer-link {
            font-size: 1.08rem;
            color: var(--text-secondary);
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(150, 170, 210, 0.1);
            transition: color .25s;
        }

        .drawer-link:hover,
        .drawer-link.active {
            color: var(--text);
            font-weight: 600;
        }

        .drawer-cta {
            margin-top: auto;
            text-align: center;
        }

        /* ===== 搜索浮层 ===== */
        .search-overlay {
            position: fixed;
            inset: 0;
            z-index: 200;
            display: flex;
            align-items: flex-start;
            justify-content: center;
            padding: 100px 1rem 0;
            background: rgba(3, 6, 18, 0.75);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            opacity: 0;
            visibility: hidden;
            transition: all .3s;
        }

        .search-overlay.open {
            opacity: 1;
            visibility: visible;
        }

        .search-panel {
            width: min(560px, 100%);
            background: rgba(10, 19, 45, 0.97);
            border: 1px solid var(--panel-border);
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        }

        .search-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1.2rem;
        }

        .search-title {
            color: var(--text);
            font-weight: 600;
            font-size: 0.95rem;
        }

        .search-form {
            display: flex;
            gap: 0.75rem;
        }

        .search-form input {
            flex: 1;
            background: rgba(255, 255, 255, 0.04);
            border: none;
            border-bottom: 1px solid rgba(110, 160, 255, 0.3);
            padding: 0.7rem 0.9rem;
            border-radius: 8px;
            color: var(--text);
            font-size: 0.95rem;
            outline: none;
            transition: border-color .25s, box-shadow .25s;
        }

        .search-form input:focus {
            border-bottom-color: var(--cyan);
            box-shadow: 0 4px 12px rgba(33, 227, 255, 0.18);
        }

        .search-form input::placeholder {
            color: var(--text-muted);
        }

        /* ===== 文章头部 ===== */
        .article-hero {
            position: relative;
            padding: 3.5rem 0 2rem;
            background: linear-gradient(180deg, rgba(10, 19, 45, 0.72) 0%, rgba(5, 8, 24, 0) 100%);
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.55rem;
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color .25s;
        }

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

        .breadcrumb .current {
            color: var(--text);
            max-width: 340px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-title {
            font-size: clamp(1.75rem, 3.4vw, 2.55rem);
            font-weight: 800;
            line-height: 1.32;
            letter-spacing: 0.01em;
            color: var(--text);
            max-width: 850px;
            text-shadow: 0 0 22px rgba(47, 143, 255, 0.22);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.5rem;
            margin-top: 1.1rem;
            color: var(--text-muted);
            font-size: 0.875rem;
        }

        .meta-category {
            display: inline-flex;
            align-items: center;
            color: var(--cyan);
            border: 1px solid rgba(33, 227, 255, 0.25);
            padding: 0.18rem 0.7rem;
            border-radius: 999px;
            font-size: 0.78rem;
            background: rgba(33, 227, 255, 0.06);
        }

        .meta-dot {
            opacity: 0.55;
        }

        /* ===== 正文区 ===== */
        .article-layout {
            padding: 2.8rem 0 2.5rem;
        }

        .article-cover {
            max-width: 760px;
            margin: 0 auto 2.5rem;
            border-radius: 16px;
            overflow: hidden;
            position: relative;
        }

        .article-cover img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }

        .article-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            box-shadow: inset 0 0 0 1px rgba(110, 160, 255, 0.14);
            border-radius: 16px;
            pointer-events: none;
        }

        .article-content {
            max-width: 760px;
            margin: 0 auto;
            font-size: 1.0625rem;
            line-height: 1.9;
            color: #c7d4ea;
        }

        .article-content> :first-child {
            margin-top: 0;
        }

        .article-content h2 {
            font-size: 1.7rem;
            color: var(--text);
            font-weight: 700;
            margin: 1.8em 0 0.7em;
            line-height: 1.35;
        }

        .article-content h3 {
            font-size: 1.3rem;
            color: var(--text);
            font-weight: 600;
            margin: 1.6em 0 0.6em;
            padding-left: 0.75rem;
            border-left: 3px solid var(--cyan);
            line-height: 1.4;
        }

        .article-content h4 {
            font-size: 1.12rem;
            color: var(--text);
            font-weight: 600;
            margin: 1.4em 0 0.5em;
        }

        .article-content p {
            margin-bottom: 1.6em;
        }

        .article-content a {
            color: var(--primary-light);
            border-bottom: 1px solid rgba(79, 183, 255, 0.35);
            transition: border-color .25s;
        }

        .article-content a:hover {
            border-color: var(--primary-light);
        }

        .article-content strong {
            color: var(--text);
            font-weight: 600;
        }

        .article-content blockquote {
            border-left: 4px solid var(--cyan);
            background: rgba(33, 227, 255, 0.06);
            border-radius: 8px;
            padding: 1rem 1.4rem;
            color: #bcd4ff;
            margin: 1.8em 0;
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content ul,
        .article-content ol {
            margin: 1.4em 0;
            padding-left: 1.4rem;
        }

        .article-content ul {
            list-style: none;
        }

        .article-content ul li {
            position: relative;
            padding-left: 0.9rem;
            margin-bottom: 0.55em;
        }

        .article-content ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.72em;
            width: 6px;
            height: 6px;
            background: var(--cyan);
            border-radius: 1px;
            transform: rotate(45deg);
        }

        .article-content ol {
            list-style: none;
            counter-reset: star-item;
        }

        .article-content ol li {
            position: relative;
            padding-left: 2.2rem;
            counter-increment: star-item;
            margin-bottom: 0.6em;
        }

        .article-content ol li::before {
            content: counter(star-item);
            position: absolute;
            left: 0;
            top: 0.15em;
            width: 1.4rem;
            height: 1.4rem;
            background: rgba(47, 143, 255, 0.16);
            color: var(--primary-light);
            border-radius: 50%;
            font-size: 0.72rem;
            font-family: 'JetBrains Mono', 'Roboto Mono', Consolas, monospace;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .article-content img {
            border-radius: 14px;
            margin: 1.6em auto;
        }

        .article-content figure {
            margin: 1.8em 0;
        }

        .article-content figcaption {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.8rem;
            margin-top: 0.6rem;
        }

        .article-content hr {
            border: none;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(110, 160, 255, 0.25), transparent);
            margin: 2.5em 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            background: rgba(10, 19, 45, 0.6);
            border-radius: 12px;
            overflow: hidden;
        }

        .article-content th,
        .article-content td {
            padding: 0.75rem 1rem;
            border-bottom: 1px solid rgba(150, 170, 210, 0.1);
            text-align: left;
            color: #c7d4ea;
            font-size: 0.95rem;
        }

        .article-content th {
            color: var(--text);
            background: rgba(47, 143, 255, 0.08);
            font-weight: 600;
        }

        /* ===== 空状态 ===== */
        .empty-state {
            text-align: center;
            padding: 4.5rem 1rem;
            color: var(--text-muted);
            background: rgba(10, 19, 45, 0.4);
            border: 1px dashed rgba(110, 160, 255, 0.2);
            border-radius: 16px;
        }

        .empty-state p {
            font-size: 1.1rem;
            color: var(--text-secondary);
        }

        .empty-state .btn {
            margin-top: 1.4rem;
        }

        /* ===== 文章底部 ===== */
        .article-bottom {
            max-width: 760px;
            margin: 2.5rem auto 0;
            padding-top: 1.8rem;
            border-top: 1px solid rgba(150, 170, 210, 0.12);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1.2rem;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.6rem;
        }

        .tag-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .tag-pill {
            font-size: 0.8rem;
            color: #96a8c7;
            background: rgba(47, 143, 255, 0.08);
            border: 1px solid rgba(110, 160, 255, 0.22);
            border-radius: 999px;
            padding: 0.3rem 0.85rem;
            transition: all .25s;
        }

        .tag-pill:hover {
            color: var(--text);
            border-color: var(--primary-light);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 0.55rem;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .share-btn {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(110, 160, 255, 0.18);
            color: var(--text-secondary);
            transition: all .25s;
        }

        .share-btn:hover {
            background: rgba(33, 227, 255, 0.12);
            color: var(--cyan);
            border-color: var(--cyan);
        }

        /* ===== 上一篇/下一篇 ===== */
        .post-nav {
            max-width: 760px;
            margin: 2rem auto 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }

        .post-prev,
        .post-next {
            background: rgba(10, 19, 45, 0.55);
            border: 1px solid rgba(110, 160, 255, 0.12);
            border-radius: 12px;
            padding: 1rem 1.25rem;
            transition: border-color .25s, background .25s;
        }

        .post-prev:hover,
        .post-next:hover {
            border-color: rgba(110, 160, 255, 0.35);
            background: rgba(12, 22, 48, 0.7);
        }

        .post-prev {
            text-align: left;
        }

        .post-next {
            text-align: right;
        }

        .post-label {
            display: block;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 0.4rem;
        }

        .post-empty {
            color: var(--text-muted);
            font-size: 0.875rem;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 4rem 0 3rem;
        }

        .related-head {
            max-width: 760px;
            margin: 0 auto 2rem;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 1rem;
        }

        .section-eyebrow {
            font-family: 'Roboto Mono', 'JetBrains Mono', Consolas, monospace;
            font-size: 0.8rem;
            color: var(--cyan);
            letter-spacing: 0.2em;
            margin-bottom: 0.4rem;
            text-transform: uppercase;
        }

        .related-head h2 {
            font-size: 1.8rem;
            color: var(--text);
            font-weight: 700;
        }

        .related-grid {
            max-width: 760px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        .related-card {
            background: rgba(10, 19, 45, 0.6);
            border: 1px solid rgba(110, 160, 255, 0.12);
            border-radius: 14px;
            overflow: hidden;
            transition: transform .25s, border-color .25s, box-shadow .25s;
        }

        .related-card:hover {
            transform: translateY(-3px);
            border-color: rgba(110, 160, 255, 0.35);
            box-shadow: 0 14px 34px rgba(0, 0, 0, 0.35);
        }

        .card-link {
            display: block;
            height: 100%;
        }

        .card-thumb {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }

        .related-card:hover .card-thumb img {
            transform: scale(1.04);
        }

        .card-badge {
            position: absolute;
            top: 10px;
            left: 10px;
            background: rgba(5, 8, 24, 0.72);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            color: var(--cyan);
            font-size: 0.72rem;
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            border: 1px solid rgba(33, 227, 255, 0.25);
        }

        .card-body {
            padding: 1rem 1.1rem 1.1rem;
        }

        .card-body h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-body time {
            color: var(--text-muted);
            font-size: 0.8rem;
            font-family: 'JetBrains Mono', 'Roboto Mono', Consolas, monospace;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 3rem 0 5rem;
        }

        .cta-banner {
            position: relative;
            border-radius: 20px;
            background: linear-gradient(135deg, rgba(10, 19, 45, 0.92), rgba(8, 14, 34, 0.86)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            border: 1px solid rgba(110, 160, 255, 0.18);
            padding: 3rem 2.5rem;
            text-align: center;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(47, 143, 255, 0.18);
            filter: blur(70px);
            top: -80px;
            left: -50px;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(33, 227, 255, 0.12);
            filter: blur(60px);
            bottom: -70px;
            right: -40px;
        }

        .cta-banner h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.9rem;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 1.8rem;
            position: relative;
            z-index: 1;
            font-size: 1rem;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 1rem;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #030612;
            border-top: 1px solid rgba(110, 160, 255, 0.08);
            padding: 3.5rem 0 0;
            color: var(--text-secondary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 1rem;
            max-width: 320px;
            line-height: 1.7;
        }

        .footer-col h4 {
            color: var(--text);
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.65rem;
        }

        .footer-col a {
            color: var(--text-muted);
            font-size: 0.875rem;
            transition: color .25s;
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--text-muted);
            font-size: 0.875rem;
        }

        .footer-contact i {
            color: var(--primary-light);
            width: 16px;
        }

        .footer-social {
            display: flex;
            gap: 0.75rem;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(110, 160, 255, 0.16);
            color: var(--text-muted);
            transition: all .25s;
        }

        .footer-social a:hover {
            color: var(--cyan);
            border-color: var(--cyan);
            background: rgba(33, 227, 255, 0.08);
        }

        .footer-bottom {
            border-top: 1px solid rgba(150, 170, 210, 0.08);
            padding: 1.2rem 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 0.5rem;
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 900px) {
            .channel-nav {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
            }

            .header-cta {
                display: none;
            }

            body {
                padding-top: 60px;
            }

            .site-header,
            .header-inner {
                height: 60px;
            }

            .article-hero {
                padding: 2.5rem 0 1.5rem;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

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

            .post-nav {
                grid-template-columns: 1fr;
                gap: 0.75rem;
            }

            .article-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }

            .cta-banner {
                padding: 2.25rem 1.25rem;
            }

            .cta-banner h2 {
                font-size: 1.5rem;
            }

            .article-title {
                font-size: 1.6rem;
            }

            .article-content {
                font-size: 1rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

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

        @media (max-width: 520px) {
            .article-title {
                font-size: 1.45rem;
            }

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

            .breadcrumb .current {
                max-width: 220px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: center;
            }

            .article-meta {
                font-size: 0.8rem;
            }

            .brand-text small {
                display: none;
            }
        }