/* roulang page: index */
:root {
    --bg: #0A0F1E;
    --panel: rgba(255,255,255,0.05);
    --stroke: rgba(255,255,255,0.10);
    --blue: #1E6FFF;
    --cyan: #22D3EE;
    --violet: #7C5CFF;
    --txt-0: #F1F5F9;
    --txt-1: #94A3B8;
    --txt-2: #64748B;
    --radius-md: 12px;
    --radius-lg: 20px;
    --glow-blue: 0 0 40px rgba(30,111,255,.45);
    --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--txt-0);
    line-height: 1.8;
    overflow-x: hidden;
  }
  a { text-decoration: none; color: inherit; }
  img { display: block; max-width: 100%; }
  button { font-family: inherit; cursor: pointer; }
  input, textarea { font-family: inherit; }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
  }
  @media (min-width: 768px) {
    .container { padding: 0 24px; }
  }

  /* 头部导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(10,15,30,0.72);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 20px;
  }
  .logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }
  .logo-dot {
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: radial-gradient(circle at 30% 30%, #22D3EE 0%, #1E6FFF 70%, #0A0F1E 100%);
    box-shadow: 0 0 18px rgba(34,211,238,0.7);
  }
  .logo-text {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.01em;
    white-space: nowrap;
  }
  .logo-text strong {
    color: #22D3EE;
    font-weight: 800;
  }
  .nav-menu {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
  }
  .nav-menu a {
    display: block;
    padding: 8px 14px;
    font-size: 0.92rem;
    color: var(--txt-1);
    border-radius: 8px;
    font-weight: 500;
    transition: color .2s, background .2s;
    position: relative;
  }
  .nav-menu a:hover {
    color: #fff;
    background: rgba(255,255,255,0.04);
  }
  .nav-menu a.active {
    color: #22D3EE;
    font-weight: 600;
  }
  .nav-menu a.active::after {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 2px;
    height: 2px;
    border-radius: 4px;
    background: linear-gradient(90deg, #1E6FFF, #22D3EE);
    box-shadow: 0 0 12px rgba(34,211,238,0.5);
  }
  .nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }
  .nav-search {
    display: none;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 10px;
    padding: 6px 14px;
    color: var(--txt-2);
    font-size: 0.85rem;
    width: 170px;
    transition: border-color .2s, box-shadow .2s;
  }
  @media (min-width: 1024px) {
    .nav-search { display: flex; }
  }
  .nav-search input {
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    font-size: 0.85rem;
    width: 100%;
  }
  .nav-search:focus-within {
    border-color: rgba(34,211,238,0.5);
    box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
  }
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.92rem;
    padding: 10px 22px;
    transition: transform .15s, box-shadow .2s, background .2s, border-color .2s, color .2s;
    white-space: nowrap;
  }
  .btn:active { transform: scale(0.98); }
  .btn-ghost {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.85);
  }
  .btn-ghost:hover {
    border-color: rgba(34,211,238,0.6);
    color: #22D3EE;
  }
  .btn-primary {
    background: linear-gradient(135deg, #1E6FFF 0%, #22D3EE 100%);
    color: #fff;
    box-shadow: 0 8px 30px rgba(30,111,255,0.35);
  }
  .btn-primary:hover {
    filter: brightness(1.15);
    box-shadow: var(--glow-blue);
  }
  .btn-glow {
    background: linear-gradient(135deg, #1E6FFF 0%, #22D3EE 100%);
    color: #fff;
    box-shadow: 0 0 30px rgba(30,111,255,0.55), 0 0 60px rgba(34,211,238,0.2);
  }
  .btn-glow:hover {
    filter: brightness(1.15);
    box-shadow: 0 0 50px rgba(30,111,255,0.75), 0 0 80px rgba(34,211,238,0.3);
  }
  .btn-outline-light {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.2);
    color: rgba(255,255,255,0.9);
  }
  .btn-outline-light:hover {
    border-color: rgba(34,211,238,0.6);
    color: #22D3EE;
    background: rgba(34,211,238,0.05);
  }

  /* 移动端汉堡 */
  .burger-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    align-items: center;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 10px;
  }
  .burger-btn span {
    width: 18px;
    height: 2px;
    background: #fff;
    border-radius: 4px;
    transition: transform .25s, opacity .25s;
  }
  @media (min-width: 768px) {
    .burger-btn { display: none; }
  }
  .mobile-drawer {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(10,15,30,0.92);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    padding: 28px 24px;
    flex-direction: column;
    justify-content: space-between;
  }
  .mobile-drawer.open { display: flex; }
  .mobile-drawer-menu { list-style: none; display: flex; flex-direction: column; gap: 8px; }
  .mobile-drawer-menu a {
    display: block;
    padding: 14px 18px;
    font-size: 1.1rem;
    color: var(--txt-1);
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.06);
    background: rgba(255,255,255,0.02);
    transition: all .2s;
  }
  .mobile-drawer-menu a:hover,
  .mobile-drawer-menu a.active { color: #22D3EE; border-color: rgba(34,211,238,0.3); }
  .drawer-close {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 42px;
    height: 42px;
    justify-content: center;
    align-items: center;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 10px;
    position: absolute;
    top: 20px;
    right: 20px;
  }
  .drawer-close span:first-child {
    width: 20px; height: 2px; background: #fff; transform: rotate(45deg) translate(2px, 2px);
  }
  .drawer-close span:last-child {
    width: 20px; height: 2px; background: #fff; transform: rotate(-45deg) translate(2px, -2px);
  }

  /* Hero */
  .hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 0 60px;
    background:
      linear-gradient(180deg, rgba(10,15,30,0.55) 0%, rgba(10,15,30,0.75) 70%, #0A0F1E 100%),
      url('/assets/images/backpic/back-1.webp') no-repeat center center / cover;
    overflow: hidden;
  }
  .hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(34,211,238,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(34,211,238,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
  }
  .hero::after {
    content: "";
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(30,111,255,0.25) 0%, transparent 65%);
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
  }
  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
    padding: 0 18px;
  }
  .hero h1 {
    font-size: clamp(2.4rem, 5vw, 3.75rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 20px;
  }
  .hero h1 .gradient-text {
    background: linear-gradient(135deg, #22D3EE 10%, #1E6FFF 90%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  .hero-sub {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--txt-1);
    max-width: 640px;
    margin: 0 auto 36px;
    line-height: 1.8;
  }
  .hero-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
  }
  .scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    width: 30px;
    height: 48px;
    border: 2px solid rgba(255,255,255,0.35);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    padding-top: 10px;
  }
  .scroll-down i {
    width: 4px;
    height: 8px;
    background: #22D3EE;
    border-radius: 6px;
    animation: scrollPulse 1.6s infinite;
  }
  @keyframes scrollPulse {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(14px); opacity: 0; }
  }

  /* 板块通用 */
  .section {
    position: relative;
    padding: 64px 0;
  }
  @media (min-width: 768px) {
    .section { padding: 96px 0; }
  }
  .section-head {
    margin-bottom: 44px;
  }
  .section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: #22D3EE;
    background: rgba(34,211,238,0.1);
    border: 1px solid rgba(34,211,238,0.2);
    padding: 4px 14px;
    border-radius: 999px;
    margin-bottom: 14px;
  }
  .section-title {
    font-size: clamp(1.7rem, 3vw, 2.25rem);
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.02em;
  }
  .section-desc {
    margin-top: 12px;
    color: var(--txt-1);
    font-size: 1rem;
    max-width: 640px;
  }

  /* 玻璃卡 */
  .glass-card {
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 16px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: transform .3s, border-color .3s, box-shadow .3s;
  }
  .glass-card:hover {
    transform: translateY(-4px);
    border-color: rgba(34,211,238,0.35);
    box-shadow: 0 20px 50px rgba(30,111,255,0.18);
  }

  /* 服务区交错网格 */
  .service-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }
  @media (min-width: 768px) {
    .service-grid {
      grid-template-columns: 1fr 1fr;
    }
    .service-card-main { grid-row: span 2; }
  }
  @media (min-width: 1024px) {
    .service-grid {
      grid-template-columns: 0.9fr 1.1fr;
      grid-template-areas: "main col" "main col2";
    }
    .service-card-main { grid-area: main; }
    .service-card-1 { grid-area: col; }
    .service-card-2 { grid-area: col2; }
  }
  .service-card {
    padding: 36px 32px;
  }
  .service-card-main {
    display: flex;
    flex-direction: column;
    justify-content: center;
    background:
      linear-gradient(145deg, rgba(30,111,255,0.12) 0%, rgba(255,255,255,0.03) 60%),
      url('/assets/images/backpic/back-2.webp') no-repeat right bottom / 60% auto;
  }
  .service-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(30,111,255,0.25), rgba(34,211,238,0.2));
    border: 1px solid rgba(34,211,238,0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
    box-shadow: 0 0 20px rgba(30,111,255,0.15);
  }
  .service-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
  }
  .service-card p {
    color: var(--txt-1);
    font-size: 0.92rem;
    line-height: 1.8;
  }

  /* 数据区 */
  .stats-section {
    background:
      radial-gradient(ellipse at 80% 20%, rgba(124,92,255,0.12) 0%, transparent 55%),
      var(--bg);
    border-top: 1px solid rgba(255,255,255,0.04);
    border-bottom: 1px solid rgba(255,255,255,0.04);
  }
  .stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
  }
  @media (min-width: 640px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
  }
  @media (min-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(4, 1fr); }
  }
  .stat-item {
    text-align: center;
    padding: 20px 10px;
  }
  .stat-num {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    background: linear-gradient(135deg, #22D3EE, #7C5CFF);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.3;
  }
  .stat-label {
    margin-top: 4px;
    color: var(--txt-1);
    font-size: 0.9rem;
  }

  /* 案例区 */
  .case-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }
  @media (min-width: 768px) {
    .case-grid {
      grid-template-columns: 1fr 1fr;
      grid-template-areas: "main main" "card1 card2";
    }
  }
  @media (min-width: 1024px) {
    .case-grid {
      grid-template-columns: 1.2fr 0.8fr;
      grid-template-areas: "main card1" "main card2";
    }
  }
  .case-main { grid-area: main; }
  .case-card-1 { grid-area: card1; }
  .case-card-2 { grid-area: card2; }
  .case-item {
    overflow: hidden;
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 20px;
    backdrop-filter: blur(12px);
    transition: transform .3s, border-color .3s, box-shadow .3s;
  }
  .case-item:hover {
    transform: translateY(-4px);
    border-color: rgba(34,211,238,0.3);
    box-shadow: 0 18px 45px rgba(30,111,255,0.15);
  }
  .case-cover {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
  }
  .case-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .45s;
  }
  .case-item:hover .case-cover img { transform: scale(1.05); }
  .case-body {
    padding: 26px;
  }
  .case-body h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
  }
  .case-body p {
    color: var(--txt-1);
    font-size: 0.92rem;
    line-height: 1.8;
  }
  .case-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 14px;
    color: #22D3EE;
    font-size: 0.9rem;
    font-weight: 600;
    transition: gap .2s, color .2s;
  }
  .case-link:hover { gap: 10px; color: #fff; }

  /* 流程区 */
  .flow-section {
    background:
      radial-gradient(ellipse at 20% 60%, rgba(30,111,255,0.1), transparent 55%),
      var(--bg);
  }
  .flow-wrap {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    align-items: center;
  }
  @media (min-width: 1024px) {
    .flow-wrap {
      grid-template-columns: 1fr 1fr;
    }
  }
  .flow-steps {
    position: relative;
    padding-left: 30px;
  }
  .flow-steps::before {
    content: "";
    position: absolute;
    left: 12px;
    top: 20px;
    bottom: 20px;
    width: 1px;
    background: linear-gradient(180deg, #1E6FFF, #22D3EE, transparent);
  }
  .flow-step {
    position: relative;
    padding: 20px 0;
  }
  .flow-step .step-num {
    position: absolute;
    left: -30px;
    top: 14px;
    font-size: 2.2rem;
    font-weight: 800;
    color: rgba(255,255,255,0.08);
    line-height: 1;
    letter-spacing: -0.03em;
  }
  .flow-step h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
  }
  .flow-step p {
    color: var(--txt-1);
    font-size: 0.9rem;
  }
  .flow-visual {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--stroke);
    min-height: 320px;
    background: url('/assets/images/backpic/back-3.png') no-repeat center center / cover;
  }
  .flow-visual::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(10,15,30,0.6) 100%);
  }

  /* 资讯区 */
  .news-card {
    display: flex;
    flex-direction: column;
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 16px;
    backdrop-filter: blur(12px);
    padding: 28px;
    transition: transform .3s, border-color .3s, box-shadow .3s;
    height: 100%;
  }
  .news-card:hover {
    transform: translateY(-4px);
    border-color: rgba(34,211,238,0.3);
    box-shadow: 0 18px 40px rgba(30,111,255,0.15);
  }
  .news-tag {
    display: inline-block;
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 600;
    color: #22D3EE;
    background: rgba(34,211,238,0.1);
    border: 1px solid rgba(34,211,238,0.2);
    padding: 2px 12px;
    border-radius: 999px;
    margin-bottom: 12px;
  }
  .news-card h3 {
    font-size: 1.06rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .news-card p {
    color: var(--txt-1);
    font-size: 0.9rem;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
    flex-grow: 1;
  }
  .news-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--txt-2);
    font-size: 0.82rem;
  }
  .news-more {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: #22D3EE;
    font-weight: 500;
    transition: gap .2s;
  }
  .news-more:hover { gap: 9px; color: #fff; }
  .news-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }
  @media (min-width: 640px) {
    .news-grid { grid-template-columns: repeat(2, 1fr); }
  }
  @media (min-width: 1024px) {
    .news-grid { grid-template-columns: repeat(3, 1fr); }
  }
  .empty-tip {
    text-align: center;
    padding: 60px 20px;
    color: var(--txt-2);
    font-size: 0.95rem;
    border: 1px dashed rgba(255,255,255,0.12);
    border-radius: 20px;
    background: rgba(255,255,255,0.02);
  }

  /* FAQ */
  .faq-item {
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 16px;
    backdrop-filter: blur(12px);
    margin-bottom: 14px;
    overflow: hidden;
    transition: border-color .3s, box-shadow .3s;
  }
  .faq-item.active {
    border-color: rgba(34,211,238,0.4);
    box-shadow: 0 0 25px rgba(34,211,238,0.08);
  }
  .faq-q {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    font-weight: 600;
    font-size: 0.98rem;
    cursor: pointer;
    user-select: none;
  }
  .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: transform .3s, background .3s;
    flex-shrink: 0;
  }
  .faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: rgba(34,211,238,0.15);
    border-color: rgba(34,211,238,0.3);
  }
  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease, padding .35s ease;
    color: var(--txt-1);
    font-size: 0.9rem;
    line-height: 1.85;
    padding: 0 24px;
  }
  .faq-item.active .faq-a {
    max-height: 500px;
    padding-bottom: 20px;
    padding-top: 0;
  }

  /* CTA */
  .cta-banner {
    position: relative;
    border-radius: 24px;
    padding: 60px 40px;
    text-align: center;
    overflow: hidden;
    border: 1px solid rgba(34,211,238,0.25);
    background:
      linear-gradient(135deg, rgba(30,111,255,0.18) 0%, rgba(10,15,30,0.85) 50%, rgba(34,211,238,0.12) 100%),
      url('/assets/images/backpic/back-1.webp') no-repeat center center / cover;
  }
  .cta-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 100%, rgba(34,211,238,0.15) 0%, transparent 60%);
    pointer-events: none;
  }
  .cta-banner h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 800;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
  }
  .cta-banner p {
    color: var(--txt-1);
    max-width: 560px;
    margin: 0 auto 28px;
    position: relative;
    z-index: 1;
  }
  .cta-banner .btn { position: relative; z-index: 1; }

  /* 联系 */
  .contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    margin-top: 30px;
  }
  @media (min-width: 640px) {
    .contact-grid { grid-template-columns: repeat(3, 1fr); }
  }
  .contact-item {
    background: var(--panel);
    border: 1px solid var(--stroke);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    backdrop-filter: blur(10px);
  }
  .contact-item .icon {
    font-size: 1.6rem;
    margin-bottom: 8px;
  }
  .contact-item strong {
    display: block;
    font-size: 0.98rem;
    margin-bottom: 4px;
  }
  .contact-item span {
    color: var(--txt-1);
    font-size: 0.85rem;
  }

  /* 页脚 */
  .site-footer {
    background: #070B14;
    border-top: 1px solid rgba(255,255,255,0.04);
    padding-top: 60px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
  @media (min-width: 640px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
  }
  @media (min-width: 1024px) {
    .footer-grid { grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr; }
  }
  .footer-brand .logo-text {
    font-size: 1.2rem;
    margin-bottom: 10px;
    display: inline-block;
  }
  .footer-brand p {
    color: var(--txt-2);
    font-size: 0.85rem;
    line-height: 1.8;
  }
  .footer-col h4 {
    font-size: 0.98rem;
    font-weight: 700;
    margin-bottom: 16px;
  }
  .footer-col ul {
    list-style: none;
  }
  .footer-col ul li { margin-bottom: 8px; }
  .footer-col ul a {
    color: var(--txt-2);
    font-size: 0.88rem;
    transition: color .2s;
  }
  .footer-col ul a:hover { color: #22D3EE; }
  .footer-copyright {
    padding: 22px 0;
    text-align: center;
    color: var(--txt-2);
    font-size: 0.8rem;
  }

  /* 面包屑 */
  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--txt-2);
    padding: 24px 0 12px;
  }
  .breadcrumb a { color: var(--txt-1); transition: color .2s; }
  .breadcrumb a:hover { color: #22D3EE; }
  .breadcrumb .sep { color: var(--txt-2); }

  /* 通用标题分隔 */
  .title-line {
    width: 44px;
    height: 3px;
    background: linear-gradient(90deg, #1E6FFF, #22D3EE);
    border-radius: 6px;
    margin-top: 14px;
  }

  @media (max-width: 767px) {
    .nav-menu, .nav-actions .btn-ghost, .nav-actions .btn-primary { display: none; }
    .hero { min-height: 80vh; padding: 60px 0 50px; }
    .cta-banner { padding: 40px 22px; }
  }
  @media (min-width: 768px) and (max-width: 1023px) {
    .nav-menu a { padding: 8px 10px; font-size: 0.85rem; }
  }
  @media (min-width: 768px) {
    .burger-btn { display: none; }
  }

/* roulang page: category1 */
:root {
  --bg: #0A0F1E;
  --panel: rgba(255,255,255,0.05);
  --stroke: rgba(255,255,255,0.10);
  --blue: #1E6FFF;
  --cyan: #22D3EE;
  --violet: #7C5CFF;
  --txt-0: #F1F5F9;
  --txt-1: #94A3B8;
  --txt-2: #64748B;
  --radius-md: 12px;
  --radius-lg: 20px;
  --glow-blue: 0 0 40px rgba(30,111,255,.45);
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--txt-0);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 15, 30, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff, var(--cyan) 40%, var(--blue) 90%);
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.7), 0 0 36px rgba(30, 111, 255, 0.35);
}

.logo-text {
  font-size: 1rem;
  letter-spacing: 0.01em;
  color: var(--txt-0);
  white-space: nowrap;
}

.logo-text strong {
  font-weight: 800;
  font-size: 1.1rem;
  background: linear-gradient(135deg, #fff, var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 4px;
  align-items: center;
}

.nav-menu a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.95rem;
  color: var(--txt-1);
  border-radius: 8px;
  transition: color .2s ease, background .2s ease;
  position: relative;
}

.nav-menu a:hover {
  color: #fff;
  background: rgba(255,255,255,0.06);
}

.nav-menu a.active {
  color: var(--cyan);
  font-weight: 600;
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-search {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 10px;
  padding: 6px 12px;
  width: 180px;
  color: var(--txt-2);
}

.nav-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--txt-0);
  font-size: 0.85rem;
  width: 100%;
}

.nav-search input::placeholder { color: var(--txt-2); }

.nav-search:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 8px 18px;
  transition: all .2s ease;
  white-space: nowrap;
}

.btn-ghost {
  border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.85);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #fff;
  box-shadow: 0 4px 16px rgba(30,111,255,0.35);
}

.btn-primary:hover {
  filter: brightness(1.15);
  box-shadow: var(--glow-blue);
}

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

.btn-glow {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #fff;
  box-shadow: 0 0 24px rgba(30,111,255,0.5), 0 0 60px rgba(34,211,238,0.2);
  transition: all .25s ease;
}

.btn-glow:hover {
  filter: brightness(1.18);
  box-shadow: 0 0 40px rgba(30,111,255,0.65), 0 0 80px rgba(34,211,238,0.3);
}

.btn-glow:active {
  transform: scale(0.97);
}

.burger-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.burger-btn span {
  width: 22px;
  height: 2px;
  background: var(--txt-0);
  border-radius: 2px;
  transition: all .3s ease;
}

/* 移动端抽屉 */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(10, 15, 30, 0.92);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  display: flex;
  flex-direction: column;
  padding: 24px;
  transform: translateX(100%);
  transition: transform .35s cubic-bezier(.4,0,.2,1);
}

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

.mobile-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.mobile-drawer nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-drawer nav a {
  display: block;
  padding: 14px 16px;
  font-size: 1.1rem;
  color: var(--txt-1);
  border-radius: 12px;
  border: 1px solid transparent;
  transition: all .2s ease;
}

.mobile-drawer nav a:hover,
.mobile-drawer nav a.active {
  color: var(--cyan);
  background: rgba(34,211,238,0.08);
  border-color: rgba(34,211,238,0.25);
}

.mobile-drawer-bottom {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ===== Hero ===== */
.page-hero {
  position: relative;
  padding: 100px 0 80px;
  background:
    linear-gradient(rgba(10,15,30,0.72), rgba(10,15,30,0.88)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(30,111,255,0.25), transparent 65%);
  pointer-events: none;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34,211,238,0.4), transparent);
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--txt-2);
  margin-bottom: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a {
  color: var(--txt-1);
  transition: color .2s;
}

.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb span { color: var(--txt-2); }
.breadcrumb .current { color: var(--cyan); }

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.hero-content .tagline {
  display: inline-block;
  background: rgba(34,211,238,0.12);
  border: 1px solid rgba(34,211,238,0.25);
  color: var(--cyan);
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.hero-content h1 {
  font-size: clamp(2.4rem, 5vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 18px;
}

.hero-content h1 .gradient-text {
  background: linear-gradient(135deg, #fff 20%, var(--cyan) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.05rem;
  color: var(--txt-1);
  margin-bottom: 32px;
  max-width: 640px;
}

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

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

.hero-stats .stat-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.hero-stats .stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stats .stat-label {
  font-size: 0.875rem;
  color: var(--txt-1);
}

/* ===== 图文区块 ===== */
.split-section {
  padding: 90px 0;
  position: relative;
}

.split-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
}

.split-text h2 {
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 18px;
  line-height: 1.3;
}

.split-text h2 .highlight {
  color: var(--cyan);
}

.split-text p {
  color: var(--txt-1);
  margin-bottom: 16px;
}

.split-text .bullet-list {
  list-style: none;
  margin-top: 20px;
}

.split-text .bullet-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 6px 0;
  color: var(--txt-1);
  font-size: 0.95rem;
}

.split-text .bullet-list li::before {
  content: '↳';
  color: var(--cyan);
  font-weight: 700;
  flex-shrink: 0;
}

.split-image {
  position: relative;
}

.split-image .img-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--stroke);
  background: var(--panel);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.split-image .img-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.split-image .img-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(10,15,30,0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(34,211,238,0.3);
  border-radius: 12px;
  padding: 12px 20px;
  color: var(--txt-0);
  font-size: 0.9rem;
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

/* ===== 优势卡片 ===== */
.features-section {
  padding: 90px 0;
  background: linear-gradient(180deg, var(--bg) 0%, rgba(20,30,55,0.5) 50%, var(--bg) 100%);
  position: relative;
}

.features-section::before {
  content: '';
  position: absolute;
  top: 10%;
  left: -200px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124,92,255,0.12), transparent 65%);
  pointer-events: none;
}

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
  border: 1px solid rgba(34,211,238,0.25);
  background: rgba(34,211,238,0.08);
  padding: 4px 14px;
  border-radius: 100px;
}

.section-title {
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.3;
}

.section-subtitle {
  color: var(--txt-1);
  max-width: 640px;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--panel);
  border: 1px solid var(--stroke);
  border-radius: 16px;
  padding: 28px;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0;
  transition: opacity .3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34,211,238,0.35);
  box-shadow: 0 16px 40px rgba(30,111,255,0.15);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: linear-gradient(135deg, rgba(30,111,255,0.2), rgba(34,211,238,0.15));
  border: 1px solid rgba(34,211,238,0.25);
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--txt-0);
}

.feature-card p {
  color: var(--txt-1);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ===== 流程 ===== */
.process-section {
  padding: 90px 0;
}

.process-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.process-left {
  position: relative;
  padding-left: 24px;
}

.process-left::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 20px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--blue), transparent);
}

.process-step {
  position: relative;
  padding: 20px 0;
}

.process-step .step-num {
  font-size: 2.4rem;
  font-weight: 800;
  color: rgba(255,255,255,0.14);
  line-height: 1;
  margin-bottom: 6px;
}

.process-step .step-dot {
  position: absolute;
  left: -24px;
  top: 34px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 16px rgba(34,211,238,0.6);
}

.process-step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--txt-0);
}

.process-step p {
  color: var(--txt-1);
  font-size: 0.92rem;
  max-width: 380px;
}

.process-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--stroke);
  box-shadow: 0 24px 60px rgba(0,0,0,0.45);
}

.process-image img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* ===== CTA ===== */
.cta-section {
  padding: 90px 0 70px;
}

.cta-banner {
  position: relative;
  background:
    linear-gradient(135deg, rgba(30,111,255,0.15), rgba(34,211,238,0.08)),
    rgba(15, 22, 42, 0.8);
  border: 1px solid rgba(34,211,238,0.25);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 180px;
  background: radial-gradient(ellipse, rgba(30,111,255,0.3), transparent 70%);
  pointer-events: none;
}

.cta-banner h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.3;
}

.cta-banner p {
  color: var(--txt-1);
  max-width: 560px;
  margin: 0 auto 30px;
  font-size: 0.98rem;
}

.cta-banner .btn-glow {
  padding: 12px 36px;
  font-size: 1rem;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 90px 0;
  background: linear-gradient(180deg, var(--bg) 0%, rgba(20,30,55,0.4) 50%, var(--bg) 100%);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--panel);
  border: 1px solid var(--stroke);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color .3s, box-shadow .3s;
}

.faq-item.open {
  border-color: rgba(34,211,238,0.4);
  box-shadow: 0 8px 30px rgba(34,211,238,0.1);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--txt-0);
  cursor: pointer;
  user-select: none;
  transition: color .2s;
}

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

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--txt-1);
  font-size: 1rem;
  transition: all .3s ease;
}

.faq-item.open .faq-icon {
  background: var(--cyan);
  color: #0A0F1E;
  border-color: var(--cyan);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--txt-1);
  font-size: 0.92rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #070B14;
  padding-top: 70px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand .logo-text {
  font-size: 1.1rem;
  display: inline-block;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--txt-2);
  font-size: 0.88rem;
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--txt-0);
  margin-bottom: 18px;
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  color: var(--txt-2);
  font-size: 0.85rem;
  transition: color .2s;
}

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

.footer-copyright {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 24px 0;
  text-align: center;
  color: var(--txt-2);
  font-size: 0.82rem;
  line-height: 1.8;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .nav-search {
    display: none;
  }
  .nav-menu a {
    padding: 8px 10px;
    font-size: 0.88rem;
  }
}

@media (max-width: 768px) {
  .nav-wrap {
    height: 60px;
  }
  .nav-menu,
  .nav-actions .btn-ghost,
  .nav-actions .btn-primary {
    display: none;
  }
  .burger-btn {
    display: flex;
  }
  .split-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .process-wrap {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .cta-banner {
    padding: 40px 24px;
  }
  .page-hero {
    padding: 70px 0 60px;
  }
  .hero-stats {
    gap: 20px;
  }
}

@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .split-text h2 {
    font-size: 1.5rem;
  }
  .cta-banner {
    padding: 32px 20px;
  }
  .cta-banner h2 {
    font-size: 1.3rem;
  }
  .hero-btns .btn {
    width: 100%;
  }
  .section-title {
    font-size: 1.45rem;
  }
}

/* roulang page: article */
:root {
  --bg: #0A0F1E;
  --panel: rgba(255,255,255,0.05);
  --stroke: rgba(255,255,255,0.10);
  --blue: #1E6FFF;
  --cyan: #22D3EE;
  --violet: #7C5CFF;
  --txt-0: #F1F5F9;
  --txt-1: #94A3B8;
  --txt-2: #64748B;
  --radius-md: 12px;
  --radius-lg: 20px;
  --glow-blue: 0 0 40px rgba(30,111,255,.45);
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--txt-0);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color .2s ease; }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font-family: inherit; border: none; outline: none; background: none; color: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .container { padding: 0 24px; } }

/* 按钮体系 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; border-radius: 12px; padding: 12px 24px;
  font-size: 1rem; font-weight: 600; line-height: 1.2;
  transition: all .25s ease; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #1E6FFF, #22D3EE);
  color: #fff; box-shadow: 0 4px 20px rgba(30,111,255,.3);
}
.btn-primary:hover { filter: brightness(1.15); box-shadow: var(--glow-blue); transform: translateY(-2px); }
.btn-primary:active { transform: scale(.98); }
.btn-ghost {
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.85); background: transparent;
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-light { background: rgba(255,255,255,.08); border: 1px solid var(--stroke); color: var(--txt-0); }
.btn-light:hover { background: rgba(255,255,255,.14); border-color: rgba(34,211,238,.4); }
.btn-glow { box-shadow: 0 0 30px rgba(34,211,238,.35), 0 4px 20px rgba(30,111,255,.3); }
.btn-lg { padding: 16px 36px; font-size: 1.1rem; border-radius: 14px; }

/* 导航 */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,15,30,.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
.logo-area { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-dot {
  width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0;
  background: radial-gradient(circle at 35% 35%, #22D3EE, #1E6FFF);
  box-shadow: 0 0 18px rgba(34,211,238,.6);
  position: relative;
}
.logo-dot::after {
  content: ''; position: absolute; inset: -4px; border-radius: 50%;
  border: 1px solid rgba(34,211,238,.3); animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { transform: scale(1); opacity:.6; } 50% { transform: scale(1.3); opacity:0; } }
.logo-text { font-size: 1.05rem; letter-spacing: .01em; color: var(--txt-0); white-space: nowrap; }
.logo-text strong { font-weight: 800; color: #fff; }
.nav-menu { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-menu a {
  font-size: .95rem; color: var(--txt-1); font-weight: 500;
  padding: 6px 2px; position: relative; transition: color .2s ease;
}
.nav-menu a:hover { color: #fff; }
.nav-menu a.active { color: var(--cyan); }
.nav-menu a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -4px; height: 2px;
  background: linear-gradient(90deg, #22D3EE, #1E6FFF); border-radius: 2px;
  box-shadow: 0 0 12px rgba(34,211,238,.5);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-search {
  display: flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px; padding: 8px 14px; width: 200px;
  transition: border-color .25s, box-shadow .25s;
}
.nav-search:focus-within { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(34,211,238,.15); }
.nav-search span { font-size: .9rem; opacity: .6; }
.nav-search input { font-size: .88rem; color: var(--txt-0); width: 100%; background: transparent; }
.nav-search input::placeholder { color: var(--txt-2); }
.burger-btn { display: none; flex-direction: column; gap: 5px; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: 10px; border: 1px solid var(--stroke); background: rgba(255,255,255,.04); }
.burger-btn span { width: 18px; height: 2px; background: var(--txt-0); border-radius: 2px; transition: .3s; }

/* 移动抽屉 */
.mobile-drawer {
  display: none; position: fixed; inset: 0; z-index: 60;
  background: rgba(10,15,30,.92); backdrop-filter: blur(30px); -webkit-backdrop-filter: blur(30px);
  flex-direction: column; padding: 24px;
}
.mobile-drawer.open { display: flex; }
.drawer-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 36px; }
.drawer-close { width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--stroke); font-size: 1.2rem; color: var(--txt-0); }
.drawer-nav { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.drawer-nav a {
  display: block; padding: 16px 20px; border-radius: 14px;
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.06);
  color: var(--txt-1); font-size: 1.05rem; font-weight: 500;
}
.drawer-nav a.active { color: var(--cyan); border-color: rgba(34,211,238,.4); background: rgba(34,211,238,.08); }
.drawer-nav a:hover { color: #fff; }
.drawer-cta { margin-top: auto; display: flex; flex-direction: column; gap: 12px; }

/* 面包屑 */
.breadcrumb-bar {
  padding: 20px 0 0;
  background: var(--bg);
}
.breadcrumb {
  display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
  font-size: .88rem; color: var(--txt-2);
}
.breadcrumb a { color: var(--txt-1); transition: color .2s; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb .sep { color: var(--txt-2); opacity: .5; }
.breadcrumb .current { color: var(--cyan); font-weight: 500; }

/* 文章 Hero */
.article-hero {
  position: relative; padding: 48px 0 32px;
  background: linear-gradient(180deg, rgba(30,111,255,.08), transparent 60%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,.05);
}
.article-hero::before {
  content: ''; position: absolute; inset: 0;
  background: rgba(10,15,30,.6);
}
.article-hero .container { position: relative; z-index: 1; }
.article-title {
  max-width: 800px;
}
.article-title h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800; line-height: 1.3; letter-spacing: -.01em;
  color: #fff; margin: 16px 0 20px;
}
.article-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  color: var(--txt-1); font-size: .88rem;
}
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.meta-item .tag {
  background: rgba(34,211,238,.15); border: 1px solid rgba(34,211,238,.3);
  color: var(--cyan); padding: 2px 10px; border-radius: 20px; font-size: .8rem; font-weight: 500;
}
.meta-divider { opacity: .3; }

/* 正文阅读区 */
.article-main { padding: 48px 0 64px; }
.article-content-wrap { max-width: 800px; margin: 0 auto; }
.article-content {
  background: var(--panel);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.article-content p { color: var(--txt-1); line-height: 1.85; margin-bottom: 1.4rem; font-size: 1rem; }
.article-content h2 {
  border-left: 4px solid var(--cyan);
  padding-left: 16px;
  font-size: 1.45rem; font-weight: 700; color: var(--txt-0);
  margin: 2.2rem 0 1rem;
}
.article-content h3 {
  border-left: 4px solid rgba(34,211,238,.6);
  padding-left: 14px;
  font-size: 1.2rem; font-weight: 600; color: var(--txt-0);
  margin: 1.8rem 0 .8rem;
}
.article-content blockquote {
  background: rgba(30,111,255,.08);
  border-left: 3px solid var(--blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 18px 22px; color: var(--txt-1); margin: 1.5rem 0;
  font-style: normal;
}
.article-content blockquote p { margin-bottom: 0; }
.article-content img { border-radius: var(--radius-md); margin: 1.6rem 0; }
.article-content ul, .article-content ol { padding-left: 24px; margin: 1.2rem 0; color: var(--txt-1); }
.article-content li { margin-bottom: .6rem; }
.article-content a { color: var(--cyan); border-bottom: 1px solid rgba(34,211,238,.4); }
.article-content a:hover { border-bottom-color: var(--cyan); }

/* 内容未找到 */
.not-found-box {
  text-align: center; padding: 80px 24px;
  background: var(--panel); border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
}
.not-found-box h2 { font-size: 1.8rem; font-weight: 700; color: var(--txt-0); margin-bottom: 16px; }
.not-found-box p { color: var(--txt-1); margin-bottom: 28px; }

/* 相关推荐 */
.related-section { padding: 64px 0; background: rgba(255,255,255,.02); border-top: 1px solid rgba(255,255,255,.04); }
.related-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
.related-head h2 { font-size: clamp(1.6rem, 3vw, 2rem); font-weight: 700; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  display: flex; flex-direction: column; overflow: hidden;
  background: var(--panel); border: 1px solid var(--stroke);
  border-radius: 16px; transition: all .3s ease;
}
.related-card:hover { transform: translateY(-6px); border-color: rgba(34,211,238,.35); box-shadow: 0 12px 40px rgba(30,111,255,.2); }
.related-card .card-img { aspect-ratio: 16/9; overflow: hidden; }
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; transition: transform .5s ease; }
.related-card:hover .card-img img { transform: scale(1.05); }
.related-card .card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.related-card .card-body h3 { font-size: 1.05rem; font-weight: 600; color: var(--txt-0); line-height: 1.5; margin-bottom: 10px; }
.related-card .card-body p { font-size: .88rem; color: var(--txt-1); line-height: 1.65; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 14px; font-size: .88rem; font-weight: 500; color: var(--cyan);
  transition: gap .25s ease;
}
.related-card .card-link:hover { gap: 10px; }

/* 返回入口 */
.back-section { padding: 48px 0; text-align: center; }
.back-section .container { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* CTA */
.cta-section { padding: 64px 0 80px; }
.cta-banner {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, rgba(30,111,255,.18), rgba(34,211,238,.1)), var(--panel);
  border: 1px solid rgba(30,111,255,.35);
  border-radius: 24px; padding: 56px 48px; text-align: center;
}
.cta-banner::before {
  content: ''; position: absolute; top: -50%; left: -30%;
  width: 60%; height: 200%; background: radial-gradient(circle, rgba(30,111,255,.18), transparent 70%);
  pointer-events: none;
}
.cta-banner h2 { font-size: clamp(1.7rem, 3vw, 2.2rem); font-weight: 800; margin-bottom: 14px; }
.cta-banner p { color: var(--txt-1); max-width: 560px; margin: 0 auto 28px; font-size: 1rem; }
.cta-banner .btn-group { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.cta-info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 36px; }
.cta-info-item {
  background: var(--panel); border: 1px solid var(--stroke);
  border-radius: 16px; padding: 24px 20px; text-align: center;
  transition: border-color .3s ease;
}
.cta-info-item:hover { border-color: rgba(34,211,238,.35); }
.cta-info-item .icon { font-size: 1.6rem; margin-bottom: 10px; }
.cta-info-item h4 { font-size: 1rem; font-weight: 600; color: var(--txt-0); margin-bottom: 6px; }
.cta-info-item p { font-size: .85rem; color: var(--txt-2); }

/* 页脚 */
.site-footer { background: #070B14; border-top: 1px solid rgba(255,255,255,.05); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .logo-text { font-size: 1.15rem; }
.footer-brand p { color: var(--txt-2); font-size: .9rem; line-height: 1.75; margin-top: 16px; max-width: 360px; }
.footer-col h4 { font-size: .95rem; font-weight: 600; color: var(--txt-0); margin-bottom: 18px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { color: var(--txt-2); font-size: .9rem; transition: color .2s; }
.footer-col ul a:hover { color: var(--cyan); }
.footer-copyright {
  border-top: 1px solid rgba(255,255,255,.05);
  padding: 24px 0; text-align: center;
  color: var(--txt-2); font-size: .85rem; line-height: 1.8;
}

/* 响应式断点 */
@media (max-width: 1024px) {
  .nav-search { display: none; }
  .nav-menu { gap: 18px; }
  .nav-menu a { font-size: .88rem; }
  .nav-actions .btn { padding: 10px 16px; font-size: .9rem; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-menu, .nav-actions .btn-ghost, .nav-actions .btn-primary { display: none; }
  .burger-btn { display: flex; }
  .article-hero { padding: 36px 0 28px; }
  .article-content { padding: 28px 22px; }
  .article-content p { font-size: .96rem; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 40px 24px; }
  .cta-info-grid { grid-template-columns: 1fr; gap: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 520px) {
  .article-meta { gap: 8px; font-size: .8rem; }
  .article-title h1 { font-size: 1.5rem; }
  .act-banner h2 { font-size: 1.4rem; }
  .btn-lg { padding: 14px 28px; font-size: 1rem; }
  .back-section .btn { width: 100%; max-width: 320px; }
  .related-card .card-body { padding: 16px 18px 20px; }
}

/* roulang page: category2 */
:root {
            --bg: #0A0F1E;
            --panel: rgba(255, 255, 255, 0.05);
            --stroke: rgba(255, 255, 255, 0.10);
            --blue: #1E6FFF;
            --cyan: #22D3EE;
            --violet: #7C5CFF;
            --txt-0: #F1F5F9;
            --txt-1: #94A3B8;
            --txt-2: #64748B;
            --radius-md: 12px;
            --radius-lg: 20px;
            --glow-blue: 0 0 40px rgba(30, 111, 255, .45);
            --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            background: var(--bg);
            color: var(--txt-0);
            line-height: 1.8;
            font-size: 1rem;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 16px;
        }
        @media(min-width:768px) {
            .container {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(10, 15, 30, .72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-dot {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--blue), var(--cyan));
            box-shadow: 0 0 18px rgba(34, 211, 238, .6);
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 1rem;
            color: var(--txt-0);
            letter-spacing: .01em;
            white-space: nowrap;
        }
        .logo-text strong {
            font-weight: 800;
            font-size: 1.08rem;
            background: linear-gradient(90deg, #fff, var(--cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 4px;
            align-items: center;
        }
        .nav-menu li a {
            display: block;
            padding: 8px 14px;
            font-size: .925rem;
            color: var(--txt-1);
            border-radius: 10px;
            position: relative;
            transition: color .2s ease;
            white-space: nowrap;
        }
        .nav-menu li a:hover {
            color: #fff;
        }
        .nav-menu li a.active {
            color: var(--txt-0);
            font-weight: 600;
        }
        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px rgba(34, 211, 238, .5);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 10px;
            padding: 6px 12px;
            width: 180px;
        }
        .nav-search span {
            font-size: .85rem;
            opacity: .6;
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--txt-0);
            font-size: .85rem;
            width: 100%;
        }
        .nav-search input::placeholder {
            color: var(--txt-2);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            border: none;
            border-radius: 12px;
            font-size: .925rem;
            font-weight: 600;
            padding: 9px 20px;
            transition: all .25s ease;
            background: transparent;
            color: var(--txt-0);
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--blue), var(--cyan));
            color: #fff;
            box-shadow: 0 4px 20px rgba(30, 111, 255, .3);
        }
        .btn-primary:hover {
            filter: brightness(1.15);
            box-shadow: var(--glow-blue);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-ghost {
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: rgba(255, 255, 255, .85);
            background: transparent;
        }
        .btn-ghost:hover {
            border-color: var(--cyan);
            color: var(--cyan);
        }
        .btn-glow {
            box-shadow: 0 0 28px rgba(30, 111, 255, .55), 0 0 60px rgba(34, 211, 238, .18);
        }
        .btn-glow:hover {
            box-shadow: 0 0 44px rgba(30, 111, 255, .75), 0 0 80px rgba(34, 211, 238, .25);
        }
        .burger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            border-radius: 8px;
            z-index: 100;
        }
        .burger-btn span {
            width: 22px;
            height: 2px;
            background: var(--txt-0);
            border-radius: 2px;
            transition: all .3s ease;
        }
        .burger-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .burger-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .burger-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 90;
            background: rgba(10, 15, 30, .97);
            backdrop-filter: blur(24px);
            flex-direction: column;
            padding: 90px 32px 40px;
        }
        .mobile-drawer.active {
            display: flex;
        }
        .mobile-drawer a {
            color: var(--txt-1);
            font-size: 1.3rem;
            padding: 16px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-drawer a.active {
            color: var(--cyan);
        }
        .mobile-drawer .drawer-footer {
            margin-top: auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        /* ===== 区块通用 ===== */
        .section {
            padding: 80px 0;
        }
        @media(min-width:768px) {
            .section {
                padding: 100px 0;
            }
        }
        .section-alt {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }
        .section-head h2 {
            font-size: clamp(1.7rem, 3vw, 2.25rem);
            font-weight: 800;
            letter-spacing: -.01em;
            margin: 12px 0 12px;
        }
        .section-head p {
            color: var(--txt-1);
            font-size: .95rem;
        }
        .section-tag {
            display: inline-block;
            font-size: .78rem;
            font-weight: 600;
            letter-spacing: .05em;
            text-transform: uppercase;
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.10);
            border: 1px solid rgba(34, 211, 238, 0.20);
            border-radius: 100px;
            padding: 4px 14px;
        }
        .breadcrumb {
            padding: 18px 16px;
            font-size: .875rem;
            color: var(--txt-2);
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: var(--txt-1);
        }
        .breadcrumb a:hover {
            color: var(--cyan);
        }
        .breadcrumb span.sep {
            margin: 0 6px;
            color: var(--txt-2);
        }
        .breadcrumb .current {
            color: var(--txt-0);
        }

        /* ===== Hero ===== */
        .hero-banner {
            position: relative;
            padding: 72px 0 88px;
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 15, 30, .92) 0%, rgba(10, 15, 30, .70) 55%, rgba(30, 111, 255, .25) 100%);
        }
        .hero-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 44px 44px;
            pointer-events: none;
        }
        .hero-banner .container {
            position: relative;
            z-index: 2;
        }
        .hero-banner .hero-badge {
            display: inline-block;
            background: rgba(34, 211, 238, .12);
            border: 1px solid rgba(34, 211, 238, .25);
            color: var(--cyan);
            border-radius: 100px;
            font-size: .8rem;
            font-weight: 600;
            padding: 5px 16px;
            margin-bottom: 20px;
            letter-spacing: .03em;
        }
        .hero-banner h1 {
            font-size: clamp(2.4rem, 5vw, 3.5rem);
            font-weight: 800;
            letter-spacing: -.02em;
            line-height: 1.15;
            color: #fff;
            margin-bottom: 16px;
        }
        .hero-banner .hero-sub {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, .8);
            max-width: 640px;
            margin-bottom: 30px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== 卡片 ===== */
        .glass-card {
            background: var(--panel);
            border: 1px solid var(--stroke);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all .3s ease;
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(34, 211, 238, 0.35);
            box-shadow: 0 12px 40px rgba(30, 111, 255, .18);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            background: linear-gradient(135deg, rgba(30, 111, 255, .25), rgba(34, 211, 238, .20));
            border: 1px solid rgba(34, 211, 238, .3);
            margin-bottom: 16px;
        }
        .card-icon-small {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            font-size: 1.1rem;
        }

        /* 快速上手卡片组合 */
        .quick-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .quick-cards .card-feature {
            padding: 28px 24px;
            position: relative;
            overflow: hidden;
        }
        .quick-cards .card-feature:nth-child(1) {
            grid-column: span 1;
        }
        @media(max-width:1024px) {
            .quick-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media(max-width:640px) {
            .quick-cards {
                grid-template-columns: 1fr;
            }
        }
        .card-feature h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--txt-0);
        }
        .card-feature p {
            color: var(--txt-1);
            font-size: .875rem;
            line-height: 1.65;
        }
        .card-feature .card-num {
            position: absolute;
            right: 16px;
            top: 12px;
            font-size: 2.4rem;
            font-weight: 900;
            color: rgba(255, 255, 255, 0.06);
            line-height: 1;
            pointer-events: none;
        }

        /* ===== 操作流程 ===== */
        .steps-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-item {
            background: var(--panel);
            border: 1px solid var(--stroke);
            border-radius: 20px;
            padding: 36px 28px;
            text-align: center;
            position: relative;
            backdrop-filter: blur(10px);
            transition: all .3s ease;
        }
        .step-item:hover {
            transform: translateY(-4px);
            border-color: rgba(34, 211, 238, .35);
            box-shadow: 0 12px 36px rgba(30, 111, 255, .15);
        }
        .step-num {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1;
            color: rgba(34, 211, 238, 0.25);
            margin-bottom: 16px;
            font-family: inherit;
        }
        .step-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            color: var(--txt-1);
            font-size: .875rem;
        }
        .step-arrow {
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(34, 211, 238, .5);
            font-size: 1.4rem;
            z-index: 2;
        }
        @media(max-width:768px) {
            .steps-row {
                grid-template-columns: 1fr;
            }
            .step-arrow {
                display: none;
            }
        }

        /* ===== 左右分栏 ===== */
        .split-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .split-media {
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--stroke);
            box-shadow: 0 20px 60px rgba(0, 0, 0, .35);
            position: relative;
        }
        .split-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
            transition: transform .6s ease;
        }
        .split-media:hover img {
            transform: scale(1.03);
        }
        .split-content h2 {
            font-size: clamp(1.7rem, 3vw, 2.2rem);
            font-weight: 800;
            letter-spacing: -.01em;
            margin: 12px 0 20px;
        }
        .feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 18px 20px;
            background: var(--panel);
            border: 1px solid var(--stroke);
            border-radius: 14px;
            transition: all .25s ease;
        }
        .feature-list li:hover {
            border-color: rgba(34, 211, 238, .3);
            background: rgba(34, 211, 238, .04);
        }
        .feature-list .feature-check {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--blue), var(--cyan));
            color: #fff;
            font-size: .7rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .feature-list h3 {
            font-size: .98rem;
            font-weight: 700;
            margin-bottom: 2px;
        }
        .feature-list p {
            font-size: .85rem;
            color: var(--txt-1);
            line-height: 1.6;
        }
        @media(max-width:768px) {
            .split-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--panel);
            border: 1px solid var(--stroke);
            border-radius: 16px;
            overflow: hidden;
            transition: all .3s ease;
        }
        .faq-item.active {
            border-color: rgba(34, 211, 238, .4);
            box-shadow: 0 0 24px rgba(34, 211, 238, .10);
        }
        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-weight: 500;
            font-size: .95rem;
            cursor: pointer;
            color: var(--txt-0);
            user-select: none;
        }
        .faq-q .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--stroke);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .9rem;
            color: var(--txt-1);
            flex-shrink: 0;
            transition: all .3s ease;
        }
        .faq-item.active .faq-icon {
            border-color: var(--cyan);
            color: var(--cyan);
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }
        .faq-a-inner {
            padding: 0 24px 20px;
            color: var(--txt-1);
            font-size: .88rem;
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(30, 111, 255, .18), rgba(34, 211, 238, .1)), rgba(255, 255, 255, .02);
            border: 1px solid rgba(30, 111, 255, .3);
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            overflow: hidden;
            backdrop-filter: blur(16px);
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(34, 211, 238, .2), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-banner h2 {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            margin-bottom: 14px;
            position: relative;
        }
        .cta-banner p {
            color: var(--txt-1);
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
            font-size: .95rem;
        }
        .cta-banner .btn {
            position: relative;
            font-size: 1rem;
            padding: 13px 36px;
        }
        .contact-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 36px;
        }
        .contact-item {
            background: var(--panel);
            border: 1px solid var(--stroke);
            border-radius: 16px;
            padding: 24px 20px;
            text-align: center;
            transition: all .25s ease;
        }
        .contact-item:hover {
            border-color: rgba(34, 211, 238, .25);
            box-shadow: 0 8px 30px rgba(30, 111, 255, .10);
        }
        .contact-item .contact-icon {
            font-size: 1.6rem;
            margin-bottom: 8px;
        }
        .contact-item h4 {
            font-size: .95rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .contact-item p {
            color: var(--txt-1);
            font-size: .875rem;
        }
        @media(max-width:768px) {
            .contact-row {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #070B14;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 44px;
        }
        .footer-brand .logo-text {
            font-size: 1.1rem;
            display: block;
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: var(--txt-2);
            font-size: .85rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: .92rem;
            font-weight: 700;
            color: var(--txt-0);
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            color: var(--txt-1);
            font-size: .86rem;
            transition: color .2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--cyan);
        }
        .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 22px 0;
            text-align: center;
            color: var(--txt-2);
            font-size: .82rem;
            line-height: 1.6;
        }
        @media(max-width:768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media(max-width:520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 响应式导航 ===== */
        @media(max-width:1024px) {
            .nav-menu {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .nav-actions .btn-ghost {
                display: none;
            }
            .burger-btn {
                display: flex;
            }
        }
        @media(max-width:520px) {
            .nav-wrap {
                height: 64px;
            }
            .logo-text {
                font-size: .88rem;
            }
            .nav-actions .btn-primary {
                padding: 8px 14px;
                font-size: .82rem;
            }
        }

/* roulang page: category3 */
:root {
      --bg: #0A0F1E;
      --panel: rgba(255,255,255,0.05);
      --stroke: rgba(255,255,255,0.10);
      --blue: #1E6FFF;
      --cyan: #22D3EE;
      --violet: #7C5CFF;
      --txt-0: #F1F5F9;
      --txt-1: #94A3B8;
      --txt-2: #64748B;
      --radius-md: 12px;
      --radius-lg: 20px;
      --glow-blue: 0 0 40px rgba(30,111,255,.45);
      --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-body);
      background: var(--bg);
      color: var(--txt-0);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button {
      font-family: inherit;
      cursor: pointer;
    }

    ul {
      list-style: none;
    }

    .container {
      max-width: 1200px !important;
      margin: 0 auto;
      padding: 0 16px;
    }

    @media (min-width: 768px) {
      .container {
        padding-left: 24px;
        padding-right: 24px;
      }
    }

    .section {
      padding: 64px 0;
    }

    @media (min-width: 768px) {
      .section {
        padding: 96px 0;
      }
    }

    h1 {
      font-size: clamp(2.4rem, 5vw, 3.75rem);
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.15;
    }

    h2 {
      font-size: clamp(1.7rem, 3vw, 2.25rem);
      font-weight: 700;
      letter-spacing: -0.01em;
      line-height: 1.25;
    }

    h3 {
      font-size: 1.25rem;
      font-weight: 600;
      line-height: 1.4;
    }

    p {
      margin-bottom: 0;
    }

    .section-head {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }

    .section-head p {
      color: var(--txt-1);
      margin-top: 12px;
      font-size: 1rem;
    }

    .section-tag {
      display: inline-block;
      padding: 5px 16px;
      border-radius: 999px;
      background: rgba(34, 211, 238, 0.08);
      border: 1px solid rgba(34, 211, 238, 0.3);
      color: var(--cyan);
      font-size: 0.8rem;
      letter-spacing: 0.08em;
      margin-bottom: 14px;
    }

    /* 按钮体系 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      border-radius: 12px;
      padding: 12px 24px;
      font-size: 0.95rem;
      line-height: 1.2;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, #1E6FFF, #22D3EE);
      color: #fff;
      box-shadow: 0 8px 30px rgba(30, 111, 255, 0.3);
    }

    .btn-primary:hover {
      filter: brightness(1.15);
      box-shadow: var(--glow-blue);
      transform: translateY(-1px);
    }

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

    .btn-ghost {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: var(--txt-0);
    }

    .btn-ghost:hover {
      border-color: var(--cyan);
      color: var(--cyan);
    }

    .btn-glow {
      animation: pulseGlow 3s ease-in-out infinite;
    }

    @keyframes pulseGlow {
      0%, 100% {
        box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
      }
      50% {
        box-shadow: 0 0 45px rgba(30, 111, 255, 0.55);
      }
    }

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

    /* 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(10, 15, 30, 0.72);
      -webkit-backdrop-filter: blur(20px);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 16px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .logo-dot {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: radial-gradient(circle at 30% 30%, #22D3EE, #1E6FFF);
      box-shadow: var(--glow-blue);
      flex-shrink: 0;
    }

    .logo-text {
      font-size: 1.05rem;
      letter-spacing: 0.01em;
      white-space: nowrap;
    }

    .logo-text strong {
      font-weight: 700;
      color: #fff;
    }

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

    .nav-menu a {
      display: block;
      padding: 8px 14px;
      border-radius: 10px;
      font-size: 0.92rem;
      color: var(--txt-1);
      position: relative;
      transition: color 0.2s ease, background 0.2s ease;
    }

    .nav-menu a:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.05);
    }

    .nav-menu a.active {
      color: var(--cyan);
    }

    .nav-menu a.active::after {
      content: "";
      position: absolute;
      left: 14px;
      right: 14px;
      bottom: 2px;
      height: 2px;
      border-radius: 2px;
      background: var(--cyan);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .nav-search {
      display: none;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.10);
      border-radius: 10px;
      padding: 0 12px;
      height: 40px;
    }

    .nav-search input {
      background: transparent;
      border: none;
      outline: none;
      color: var(--txt-0);
      width: 140px;
      font-size: 0.88rem;
    }

    .nav-search input::placeholder {
      color: var(--txt-2);
    }

    .nav-search input:focus {
      border: none;
      box-shadow: none;
    }

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

    .burger-btn {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      padding: 8px;
      border-radius: 8px;
      transition: background 0.2s ease;
    }

    .burger-btn span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--txt-0);
      border-radius: 2px;
      transition: transform 0.3s ease, opacity 0.3s ease;
    }

    @media (max-width: 1023px) {
      .nav-menu {
        position: fixed;
        inset: 0;
        z-index: 55;
        margin: 0;
        background: rgba(10, 15, 30, 0.94);
        -webkit-backdrop-filter: blur(28px);
        backdrop-filter: blur(28px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 24px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
      }

      .site-header.nav-open .nav-menu {
        opacity: 1;
        visibility: visible;
        transform: none;
      }

      .nav-menu a {
        font-size: 1.25rem;
        padding: 12px 24px;
      }

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

      .nav-menu a.active {
        color: var(--cyan);
        background: rgba(34, 211, 238, 0.08);
      }

      .nav-actions {
        display: none;
      }

      .site-header.nav-open .nav-actions {
        display: flex;
        position: fixed;
        bottom: 40px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 60;
      }

      .burger-btn {
        display: flex;
      }

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

      .site-header.nav-open .burger-btn span:nth-child(2) {
        opacity: 0;
      }

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

    /* 内页 Hero */
    .page-hero {
      position: relative;
      padding: 96px 0;
      background-size: cover;
      background-position: center;
      display: flex;
      align-items: center;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 15, 30, 0.35) 0%, rgba(10, 15, 30, 0.78) 60%, #0A0F1E 100%);
    }

    .page-hero .container {
      position: relative;
      z-index: 2;
      text-align: center;
    }

    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 4px;
      margin-bottom: 20px;
      font-size: 0.88rem;
      color: var(--txt-2);
    }

    .breadcrumb a {
      color: var(--txt-1);
      transition: color 0.2s ease;
    }

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

    .breadcrumb .sep {
      margin: 0 6px;
      color: var(--txt-2);
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 999px;
      border: 1px solid rgba(34, 211, 238, 0.4);
      background: rgba(34, 211, 238, 0.08);
      color: var(--cyan);
      font-size: 0.85rem;
      letter-spacing: 0.08em;
      margin-bottom: 20px;
    }

    .page-hero .hero-sub {
      max-width: 640px;
      margin: 20px auto 0;
      color: var(--txt-1);
      font-size: 1.05rem;
    }

    .hero-actions {
      margin-top: 32px;
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    /* 步骤区 */
    .steps-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }

    @media (max-width: 1023px) {
      .steps-layout {
        grid-template-columns: 1fr;
        gap: 40px;
      }
    }

    .steps-list {
      display: flex;
      flex-direction: column;
      gap: 32px;
      position: relative;
    }

    .steps-list::before {
      content: "";
      position: absolute;
      left: 22px;
      top: 20px;
      bottom: 20px;
      width: 1px;
      background: linear-gradient(180deg, var(--blue), var(--cyan));
      opacity: 0.25;
    }

    .step-item {
      display: flex;
      gap: 20px;
      align-items: flex-start;
      position: relative;
      padding-left: 20px;
    }

    .step-number {
      font-size: 2.6rem;
      font-weight: 800;
      color: rgba(34, 211, 238, 0.18);
      line-height: 1;
      min-width: 64px;
      font-family: var(--font-body);
    }

    .step-item h3 {
      color: var(--txt-0);
      margin-bottom: 8px;
      font-size: 1.25rem;
    }

    .step-item p {
      color: var(--txt-1);
      font-size: 0.95rem;
    }

    .steps-image img {
      width: 100%;
      border-radius: var(--radius-lg);
      border: 1px solid var(--stroke);
      box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
    }

    /* 图文穿插 */
    .split-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
      margin-bottom: 72px;
    }

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

    @media (max-width: 1023px) {
      .split-row {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }

    .split-row.reverse .split-media {
      order: 2;
    }

    @media (max-width: 1023px) {
      .split-row.reverse .split-media {
        order: 0;
      }
    }

    .split-media img {
      width: 100%;
      border-radius: var(--radius-lg);
      border: 1px solid var(--stroke);
      aspect-ratio: 16 / 10;
      object-fit: cover;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    }

    .split-content h3 {
      font-size: 1.5rem;
      margin-bottom: 16px;
    }

    .split-content p {
      color: var(--txt-1);
      margin-bottom: 16px;
    }

    .check-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 16px;
    }

    .check-list li {
      position: relative;
      padding-left: 30px;
      color: var(--txt-1);
      font-size: 0.95rem;
    }

    .check-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 2px;
      color: var(--cyan);
      font-weight: 700;
      border: 1px solid rgba(34, 211, 238, 0.35);
      width: 20px;
      height: 20px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      line-height: 1;
    }

    /* 玻璃卡 */
    .glass-card {
      background: var(--panel);
      border: 1px solid var(--stroke);
      border-radius: 20px;
      padding: 32px;
      -webkit-backdrop-filter: blur(12px);
      backdrop-filter: blur(12px);
      transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .glass-card:hover {
      transform: translateY(-4px);
      border-color: rgba(34, 211, 238, 0.35);
      box-shadow: 0 16px 50px rgba(30, 111, 255, 0.18);
    }

    .tip-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    @media (max-width: 767px) {
      .tip-grid {
        grid-template-columns: 1fr;
      }
    }

    .tip-icon {
      display: inline-block;
      font-size: 1.6rem;
      margin-bottom: 14px;
    }

    .tip-card h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
    }

    .tip-card p {
      color: var(--txt-1);
      font-size: 0.92rem;
    }

    /* FAQ */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--panel);
      border: 1px solid var(--stroke);
      border-radius: 16px;
      overflow: hidden;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .faq-item.active {
      border-color: rgba(34, 211, 238, 0.4);
      box-shadow: 0 0 30px rgba(34, 211, 238, 0.08);
    }

    .faq-question {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: none;
      border: none;
      padding: 20px 24px;
      font-size: 1rem;
      font-weight: 500;
      color: var(--txt-0);
      text-align: left;
      transition: color 0.2s ease;
    }

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

    .faq-icon {
      font-size: 1.3rem;
      color: var(--cyan);
      transition: transform 0.3s ease;
      flex-shrink: 0;
      margin-left: 16px;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 500px;
      padding: 0 24px 20px;
    }

    .faq-answer p {
      color: var(--txt-1);
      font-size: 0.95rem;
    }

    /* CTA + 联系 */
    .cta-banner {
      position: relative;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(30, 111, 255, 0.4);
      border-radius: 24px;
      padding: 56px 40px;
      text-align: center;
      overflow: hidden;
    }

    .cta-banner::before {
      content: "";
      position: absolute;
      inset: -2px;
      background: linear-gradient(135deg, rgba(30, 111, 255, 0.5), rgba(34, 211, 238, 0.2), rgba(124, 92, 255, 0.3));
      z-index: -1;
      filter: blur(32px);
    }

    .cta-banner h2 {
      margin-bottom: 14px;
    }

    .cta-banner p {
      color: var(--txt-1);
      max-width: 560px;
      margin: 0 auto;
      font-size: 1rem;
    }

    .cta-actions {
      margin-top: 28px;
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .contact-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 32px;
    }

    @media (max-width: 767px) {
      .contact-grid {
        grid-template-columns: 1fr;
      }
    }

    .contact-item {
      background: var(--panel);
      border: 1px solid var(--stroke);
      border-radius: 16px;
      padding: 24px;
      text-align: center;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .contact-item:hover {
      border-color: rgba(34, 211, 238, 0.35);
      box-shadow: 0 12px 40px rgba(30, 111, 255, 0.12);
    }

    .contact-item h4 {
      color: var(--txt-0);
      font-size: 1rem;
      margin-bottom: 6px;
    }

    .contact-item p {
      color: var(--txt-1);
      font-size: 0.9rem;
    }

    /* 页脚 */
    .site-footer {
      background: #070B14;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 56px 0 32px;
      margin-top: 64px;
    }

    .site-footer .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
    }

    @media (max-width: 1023px) {
      .site-footer .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
    }

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

    .footer-brand .logo-text {
      font-size: 1.1rem;
    }

    .footer-brand p {
      color: var(--txt-2);
      font-size: 0.9rem;
      margin-top: 12px;
      max-width: 320px;
    }

    .footer-col h4 {
      font-size: 0.95rem;
      color: var(--txt-0);
      margin-bottom: 16px;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-col a {
      color: var(--txt-2);
      font-size: 0.9rem;
      transition: color 0.2s ease;
    }

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

    .footer-copyright {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      color: var(--txt-2);
      font-size: 0.85rem;
      line-height: 1.9;
    }

    /* 输入框 focus 样式 */
    input:focus {
      border-color: var(--cyan);
      box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
    }