/* roulang page: index */
:root {
    --night: #0D1119;
    --night-soft: #151B27;
    --panel: #171F2D;
    --panel-deep: #111722;
    --flame: #FF5A2E;
    --flame-hover: #FF7A55;
    --mint: #00E3B6;
    --ink: #EDF1F6;
    --sub: #A7B1BD;
    --dim: #788596;
    --line: rgba(255, 255, 255, 0.08);
    --line-strong: rgba(255, 255, 255, 0.14);
    --r-lg: 16px;
    --r-md: 12px;
    --shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
    --glow-flame: 0 0 0 1px rgba(255, 90, 46, 0.35), 0 10px 30px rgba(255, 90, 46, 0.2);
    --mint-glow: 0 0 0 1px rgba(0, 227, 182, 0.4), 0 0 18px rgba(0, 227, 182, 0.2);
  }
  * {
    box-sizing: border-box;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    background: var(--night);
    color: var(--ink);
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
    line-height: 1.8;
    margin: 0;
  }
  body.menu-open {
    overflow: hidden;
  }
  img {
    max-width: 100%;
    display: block;
  }
  a {
    color: inherit;
    text-decoration: none;
  }
  button {
    border: 0;
    cursor: pointer;
    background: none;
    font: inherit;
  }
  .container {
    width: min(1180px, 92%);
    margin: 0 auto;
  }
  .section-block {
    padding: 96px 0;
  }
  .section-block + .section-block {
    border-top: 1px solid rgba(255, 255, 255, 0.04);
  }
  .section-head {
    max-width: 720px;
    margin-bottom: 52px;
  }
  .kicker {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    letter-spacing: 0.12em;
    color: var(--mint);
    font-weight: 600;
    margin-bottom: 12px;
  }
  .kicker::before {
    content: '';
    width: 28px;
    height: 1px;
    background: currentColor;
    opacity: .6;
  }
  h1,
  h2,
  h3 {
    line-height: 1.25;
    text-wrap: balance;
    margin: 0;
  }
  h2 {
    font-size: clamp(28px, 3vw, 36px);
    font-weight: 800;
    letter-spacing: -0.01em;
  }
  .divide-line {
    border: 0;
    height: 2px;
    background: linear-gradient(90deg, #FF5A2E 0%, #FF9A55 40%, #00E3B6 100%);
    width: 100%;
    margin: 0;
    border: 0;
  }

  /* 顶部导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 999;
    background: rgba(11, 15, 22, 0.96);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }
  .site-header::after {
    content: '';
    display: block;
    height: 2px;
    background: linear-gradient(90deg, #FF5A2E 0%, #FF9A55 38%, #00E3B6 100%);
  }
  .nav {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }
  .brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    font-weight: 800;
    font-size: 20px;
    color: var(--ink);
  }
  .brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(255, 90, 46, 1), rgba(255, 122, 85, 0.8));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 900;
    font-size: 16px;
    box-shadow: 0 8px 20px rgba(255, 90, 46, 0.25);
  }
  .brand-name {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
  }
  .brand-name .small-tag {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: .2em;
    color: var(--mint);
    margin-top: 2px;
  }
  .nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
  }
  .nav-links a {
    color: var(--sub);
    padding: 8px 4px;
    margin: 0 9px;
    position: relative;
    font-weight: 500;
    transition: color .2s ease;
  }
  .nav-links a:hover {
    color: var(--ink);
  }
  .nav-links a.active {
    color: var(--mint);
    font-weight: 700;
  }
  .nav-links a.active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -3px;
    height: 2px;
    background: var(--mint);
    border-radius: 99px;
    box-shadow: 0 0 12px rgba(0, 227, 182, .55);
  }
  .nav-cta {
    margin-left: 8px;
    flex-shrink: 0;
  }
  .nav-burger {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    align-items: center;
    justify-content: center;
    color: var(--ink);
    border: 1px solid var(--line);
    background: var(--panel);
  }
  .nav-burger:focus-visible {
    outline: 2px solid var(--mint);
    outline-offset: 2px;
  }
  .mobile-nav {
    display: none;
    background: #0B0F16;
    padding: 16px 0 20px;
    border-bottom: 1px solid var(--line);
  }
  .mobile-nav a {
    display: block;
    padding: 12px 4%;
    font-size: 16px;
    color: var(--sub);
    border-radius: 10px;
  }
  .mobile-nav a.active {
    color: var(--mint);
    background: rgba(0, 227, 182, .08);
  }
  .mobile-nav a.nav-download-mobile {
    margin: 12px 4% 0;
    text-align: center;
    color: #fff;
  }

  /* 按钮 */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--flame);
    color: #fff;
    font-weight: 700;
    padding: 14px 28px;
    border-radius: 999px;
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    box-shadow: 0 10px 26px rgba(255, 90, 46, .18);
  }
  .btn-primary:hover {
    background: var(--flame-hover);
    transform: translateY(-2px);
    box-shadow: var(--glow-flame);
  }
  .btn-primary:active {
    transform: translateY(0);
  }
  .btn-primary:focus-visible,
  .btn-ghost:focus-visible,
  .btn-line:focus-visible {
    outline: 2px solid var(--mint);
    outline-offset: 3px;
  }
  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    padding: 13px 26px;
    transition: border-color .2s ease, background .2s ease, color .2s ease, transform .2s ease;
  }
  .btn-ghost:hover {
    border-color: var(--mint);
    color: var(--mint);
    background: rgba(0, 227, 182, .06);
    transform: translateY(-2px);
  }
  .btn-ghost:active {
    transform: translateY(0);
  }
  .btn-line {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--ink);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 12px 18px;
    transition: border-color .2s ease, color .2s ease, background .2s ease;
  }
  .btn-line:hover {
    color: var(--mint);
    border-color: var(--mint);
    background: rgba(0, 227, 182, .05);
  }

  /* Hero */
  .hero {
    position: relative;
    isolation: isolate;
    background:
      radial-gradient(900px 420px at 12% 20%, rgba(255, 90, 46, 0.18), transparent 64%),
      radial-gradient(700px 420px at 84% 8%, rgba(0, 227, 182, 0.10), transparent 60%),
      var(--night);
    overflow: hidden;
  }
  .hero::before {
    content: '';
    inset: 0;
    position: absolute;
    z-index: -2;
    background-image:
      linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: linear-gradient(to bottom, black, transparent 78%);
  }
  .hero-wrap {
    position: relative;
    z-index: 1;
    padding: 96px 0 110px;
    display: grid;
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 64px;
  }
  .hero-copy {
    position: relative;
    z-index: 2;
  }
  .hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    background: rgba(0, 227, 182, .1);
    border: 1px solid rgba(0, 227, 182, .25);
    color: var(--mint);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
  }
  .hero h1 {
    font-size: clamp(36px, 5vw, 54px);
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1.22;
    color: #fff;
  }
  .hero h1 .grad {
    background: linear-gradient(100deg, #FFFFFF 12%, #FFB79F 48%, #FF5A2E 92%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  .hero-lead {
    font-size: 17px;
    line-height: 1.85;
    color: var(--sub);
    max-width: 540px;
    margin: 22px 0 34px;
  }
  .hero-lead strong {
    color: var(--ink);
    font-weight: 700;
  }
  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
  }
  .hero-note {
    margin-top: 18px;
    font-size: 13px;
    color: var(--dim);
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .hero-note svg {
    color: var(--mint);
  }
  .hero-art {
    position: relative;
    z-index: 1;
  }
  .hero-shot {
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--line);
    box-shadow: 0 28px 90px rgba(0, 0, 0, 0.55);
    position: relative;
    background: var(--panel);
  }
  .hero-shot img {
    width: 100%;
    height: 430px;
    object-fit: cover;
  }
  .hero-shot::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 24px;
    pointer-events: none;
  }
  .hero-status {
    position: absolute;
    top: 18px;
    left: 18px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    color: #fff;
    font-size: 13px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .14);
  }
  .hero-status i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--mint);
    box-shadow: 0 0 0 4px rgba(0, 227, 182, .12);
  }
  .floating-note {
    position: absolute;
    right: -26px;
    bottom: 24px;
    background: linear-gradient(135deg, rgba(23, 31, 45, 0.95), rgba(23, 31, 45, 0.7));
    border: 1px solid var(--line-strong);
    border-radius: 16px;
    padding: 16px 18px;
    color: var(--ink);
    font-size: 13px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
  }
  .floating-note b {
    display: block;
    font-size: 18px;
    color: var(--mint);
  }
  @media (max-width: 1023px) {
    .hero-wrap {
      grid-template-columns: 1fr;
      gap: 40px;
      padding: 72px 0 82px;
    }
    .hero-copy {
      text-align: center;
    }
    .hero-lead {
      margin-left: auto;
      margin-right: auto;
    }
    .hero-actions {
      justify-content: center;
    }
    .hero-note {
      justify-content: center;
    }
    .hero-shot img {
      height: 320px;
    }
  }

  /* 功能亮点 Bento */
  .feature-bento {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: 1fr 1fr;
    gap: 18px;
    min-height: 460px;
  }
  .bento-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 30px;
    transition: border-color .25s ease, transform .25s ease, background .25s ease;
    position: relative;
    overflow: hidden;
  }
  .bento-card:hover {
    border-color: rgba(0, 227, 182, 0.36);
    transform: translateY(-2px);
    box-shadow: 0 18px 38px rgba(0, 0, 0, 0.3);
  }
  .bento-big {
    grid-column: span 7;
    grid-row: span 2;
    background-color: var(--panel-deep);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 460px;
  }
  .bento-big picture,
  .bento-big img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .45;
  }
  .bento-big::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(13, 17, 25, .96) 8%, rgba(13, 17, 25, .25) 66%, rgba(13, 17, 25, .2) 100%);
    z-index: 1;
  }
  .bento-content {
    position: relative;
    z-index: 2;
  }
  .bento-big h3,
  .bento-small h3,
  .bento-wide h3 {
    font-size: 21px;
    font-weight: 800;
    margin: 12px 0 10px;
  }
  .bento-big p,
  .bento-small p,
  .bento-wide p {
    color: var(--sub);
    line-height: 1.75;
    margin: 0;
    max-width: 590px;
  }
  .bento-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--mint);
    font-weight: 600;
    border: 1px solid rgba(0, 227, 182, .25);
    background: rgba(0, 227, 182, .08);
    border-radius: 999px;
    padding: 4px 12px;
  }
  .bento-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    background: rgba(255, 90, 46, .12);
    border: 1px solid rgba(255, 90, 46, .22);
    color: var(--flame);
    margin-bottom: 8px;
  }
  .bento-small-1 {
    grid-column: span 5;
    grid-row: span 1;
  }
  .bento-small-2 {
    grid-column: span 5;
    grid-row: span 1;
  }
  .bento-wide {
    grid-column: span 12;
    grid-row: span 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 24px 30px;
  }
  .bento-wide h3 {
    margin-top: 0;
  }
  .bento-wide .dl-entry {
    flex: 0 0 auto;
  }
  @media (max-width: 900px) {
    .feature-bento {
      grid-template-columns: 1fr;
      grid-template-rows: none;
    }
    .bento-big,
    .bento-small-1,
    .bento-small-2,
    .bento-wide {
      grid-column: auto;
      grid-row: auto;
      min-height: auto;
    }
    .bento-big {
      min-height: 360px;
    }
    .bento-wide {
      flex-direction: column;
      align-items: flex-start;
    }
  }

  /* 功能预览 */
  .slider-viewport {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    display: flex;
    gap: 18px;
    padding: 6px 4px 24px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,.2) transparent;
    cursor: grab;
  }
  .slider-viewport:active {
    cursor: grabbing;
  }
  .slide-item {
    flex: 0 0 47.5%;
    max-width: 520px;
    scroll-snap-align: start;
    border-radius: 20px;
    background: var(--panel);
    border: 1px solid var(--line);
    overflow: hidden;
    transition: border-color .25s ease;
  }
  .slide-item:hover {
    border-color: rgba(255, 90, 46, .35);
  }
  .slide-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
  }
  .slide-caption {
    padding: 16px 20px 20px;
    color: var(--ink);
    font-size: 15px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    line-height: 1.6;
  }
  .slide-caption span:last-child {
    color: var(--dim);
    font-size: 13px;
    white-space: nowrap;
  }
  .carousel-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 4px;
  }
  .car-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--line-strong);
    background: var(--panel);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--ink);
    transition: all .2s ease;
  }
  .car-btn:hover {
    border-color: var(--flame);
    color: var(--flame);
    box-shadow: var(--glow-flame);
    background: rgba(255, 90, 46, .08);
  }
  .car-btn:active {
    transform: scale(.96);
  }
  .car-btn:focus-visible {
    outline: 2px solid var(--mint);
    outline-offset: 2px;
  }
  .dots {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
  }
  .dots button {
    width: 9px;
    height: 9px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .18);
    transition: all .2s ease;
    border: 0;
    padding: 0;
  }
  .dots button:hover {
    background: rgba(255, 255, 255, .5);
  }
  .dots button.active {
    background: var(--mint);
    box-shadow: 0 0 10px rgba(0, 227, 182, .4);
    width: 28px;
  }
  @media (max-width: 768px) {
    .slide-item {
      flex-basis: 86%;
    }
    .slide-item img {
      height: 220px;
    }
  }

  /* 系统要求 */
  .req-grid {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: 60px;
    align-items: start;
  }
  .req-intro p {
    color: var(--sub);
    margin: 12px 0 0;
    max-width: 440px;
  }
  .req-list {
    border-top: 1px solid var(--line-strong);
  }
  .req-block {
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: 22px;
    padding: 24px 2px;
    border-bottom: 1px solid var(--line);
    align-items: start;
  }
  .req-os {
    font-weight: 800;
    font-size: 17px;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .req-os em {
    font-style: normal;
    color: var(--mint);
    font-weight: 700;
  }
  .req-rows {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .req-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    font-size: 15px;
    color: var(--sub);
  }
  .req-row b {
    color: var(--ink);
    font-weight: 600;
    text-align: right;
  }
  @media (max-width: 900px) {
    .req-grid {
      grid-template-columns: 1fr;
      gap: 36px;
    }
  }

  /* 用户评价 */
  .review-section {
    background: linear-gradient(180deg, rgba(21, 27, 39, .65), rgba(13, 17, 25, 0.4));
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }
  .rating-summary {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px 48px;
    padding: 12px 0 8px;
    margin-bottom: 44px;
    border-radius: 20px;
  }
  .rating-big {
    display: flex;
    align-items: center;
    gap: 16px;
  }
  .rating-big .score {
    font-size: 58px;
    font-weight: 900;
    color: #fff;
    line-height: 1;
  }
  .rating-big .stars {
    color: #FFB43A;
    letter-spacing: 2px;
    font-size: 18px;
    line-height: 1;
  }
  .rating-meta {
    color: var(--dim);
    font-size: 14px;
  }
  .review-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
  .review-card {
    background: rgba(23, 31, 45, 0.8);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 28px;
    transition: border-color .25s ease, transform .25s ease;
  }
  .review-card:hover {
    border-color: rgba(0, 227, 182, .3);
    transform: translateY(-2px);
  }
  .review-card.wide {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    align-items: center;
    gap: 20px;
  }
  .review-person {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .avatar {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FF5A2E, #FF9A55);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    flex-shrink: 0;
  }
  .avatar.alt {
    background: linear-gradient(135deg, #0E8C79, #00E3B6);
  }
  .avatar.alt2 {
    background: linear-gradient(135deg, #4b6a8a, #9aa5b1);
  }
  .review-person .username {
    color: #fff;
    font-weight: 600;
    line-height: 1.3;
  }
  .review-person .source {
    font-size: 12px;
    color: var(--dim);
  }
  .stars {
    color: #FFB43A;
    letter-spacing: 1px;
    font-size: 14px;
    margin-top: 2px;
  }
  .review-body {
    margin-top: 18px;
    color: var(--sub);
    font-size: 15px;
  }
  .review-card.wide .review-body {
    margin-top: 0;
  }
  @media (max-width: 820px) {
    .review-grid {
      grid-template-columns: 1fr;
    }
    .review-card.wide {
      grid-column: auto;
      grid-template-columns: 1fr;
    }
    .review-card.wide .review-body {
      margin-top: 10px;
    }
  }

  /* 下载区域 */
  .download-section {
    position: relative;
    isolation: isolate;
    overflow: hidden;
  }
  .download-section::before {
    content: '';
    position: absolute;
    z-index: -1;
    inset: 0;
    background:
      radial-gradient(620px 320px at 50% 40%, rgba(255, 90, 46, .13), transparent 70%),
      radial-gradient(450px 280px at 80% 10%, rgba(0, 227, 182, .07), transparent 70%);
  }
  .download-panel {
    border: 1px solid var(--line);
    background: rgba(23, 31, 45, .72);
    border-radius: 28px;
    overflow: hidden;
    padding: 52px;
    text-align: center;
  }
  .download-panel h2 {
    font-size: clamp(26px, 3vw, 36px);
  }
  .download-panel .sub-download {
    color: var(--sub);
    max-width: 620px;
    margin: 16px auto 30px;
  }
  .download-big {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
  }
  .dl-android {
    position: relative;
    flex: 0 0 auto;
  }
  .dl-android .btn-primary {
    font-size: 17px;
    padding: 17px 34px;
  }
  .download-meta {
    margin-top: 26px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 26px;
    font-size: 13px;
    color: var(--dim);
  }
  .download-meta strong {
    color: var(--mint);
    font-weight: 700;
  }
  .pill-line {
    display: inline-flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
  }

  /* 资讯 */
  .news-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: stretch;
  }
  .news-feature {
    display: block;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 30px;
    position: relative;
    min-height: 320px;
    transition: border-color .25s ease, transform .25s ease;
  }
  .news-feature:hover,
  .news-row {
    border-color: rgba(255, 255, 255, .2);
  }
  .news-feature:hover {
    border-color: var(--mint);
    transform: translateY(-2px);
  }
  .tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    color: var(--mint);
    background: rgba(0, 227, 182, .08);
    border: 1px solid rgba(0, 227, 182, .22);
    border-radius: 999px;
    padding: 3px 12px;
    margin-bottom: 18px;
  }
  .tag-orange {
    color: var(--flame);
    background: rgba(255, 90, 46, .09);
    border-color: rgba(255, 90, 46, .25);
  }
  .news-feature h3 {
    font-size: 28px;
    line-height: 1.4;
    margin-bottom: 12px;
  }
  .news-feature p {
    color: var(--sub);
    max-width: 480px;
  }
  .news-feature .meta,
  .news-row .meta {
    margin-top: 20px;
    font-size: 13px;
    color: var(--dim);
    display: flex;
    align-items: center;
    gap: 14px;
  }
  .news-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .news-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 20px 22px;
    color: var(--ink);
    transition: border-color .2s ease, background .2s ease, transform .2s ease;
  }
  .news-row:hover {
    border-color: rgba(0, 227, 182, .38);
    background: rgba(23, 31, 45, .85);
    transform: translateX(3px);
  }
  .news-row h3 {
    font-size: 17px;
    line-height: 1.55;
    margin: 0 0 8px;
    font-weight: 700;
  }
  .news-row p {
    margin: 0;
    color: var(--sub);
    font-size: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .news-row .row-right {
    flex: 0 0 auto;
    font-size: 13px;
    color: var(--dim);
    text-align: right;
  }
  .empty-state {
    grid-column: 1 / -1;
    border: 1px dashed rgba(255, 255, 255, .18);
    border-radius: 20px;
    padding: 76px 20px;
    text-align: center;
    color: var(--sub);
    background: rgba(23, 31, 45, .5);
  }
  @media (max-width: 860px) {
    .news-wrap {
      grid-template-columns: 1fr;
    }
    .news-feature {
      min-height: 0;
    }
  }

  /* FAQ */
  .faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .faq-item {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    overflow: hidden;
    transition: border-color .2s ease;
  }
  .faq-item[open] {
    border-color: rgba(0, 227, 182, .34);
  }
  .faq-item summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 20px 24px;
    cursor: pointer;
    color: var(--ink);
    font-weight: 600;
    font-size: 16px;
    transition: background .2s ease;
  }
  .faq-item summary::-webkit-details-marker {
    display: none;
  }
  .faq-item summary:hover {
    background: rgba(255, 255, 255, .03);
  }
  .faq-q {
    display: inline-flex;
    align-items: center;
    gap: 12px;
  }
  .faq-q i {
    font-style: normal;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(0, 227, 182, .1);
    color: var(--mint);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 13px;
    flex: 0 0 auto;
  }
  .faq-icon {
    color: var(--dim);
    flex: 0 0 auto;
    transition: transform .3s ease, color .3s ease;
  }
  .faq-item[open] .faq-icon {
    transform: rotate(45deg);
    color: var(--mint);
  }
  .faq-item .faq-body {
    padding: 0 24px 22px 62px;
    color: var(--sub);
    line-height: 1.85;
    font-size: 15px;
  }

  /* CTA */
  .bottom-cta {
    background: linear-gradient(180deg, rgba(21, 27, 39, .6), rgba(13, 17, 25, 0.2));
    border-top: 1px solid var(--line);
    text-align: center;
    padding: 70px 0;
  }
  .bottom-cta h2 {
    font-size: clamp(24px, 4vw, 34px);
  }
  .bottom-cta p {
    color: var(--sub);
    margin: 14px auto 26px;
    max-width: 560px;
    font-size: 16px;
  }

  /* 页脚 */
  .site-footer {
    background: #0B0F16;
    border-top: 2px solid rgba(255, 255, 255, .06);
    padding: 52px 0 28px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 42px;
  }
  .footer-copy p {
    color: var(--sub);
    max-width: 380px;
    margin-top: 14px;
    font-size: 14px;
  }
  .footer-col h4 {
    color: #fff;
    font-size: 15px;
    margin: 0 0 14px;
    font-weight: 700;
  }
  .footer-col a {
    display: block;
    padding: 6px 0;
    color: var(--sub);
    font-size: 14px;
    transition: color .2s ease, padding-left .2s ease;
  }
  .footer-col a:hover {
    color: var(--mint);
    padding-left: 4px;
  }
  .footer-bottom {
    margin-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, .07);
    padding-top: 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    color: var(--dim);
    font-size: 13px;
  }
  @media (max-width: 760px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 26px;
    }
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }

  @media (max-width: 1023px) {
    .section-block {
      padding: 72px 0;
    }
    .nav-links {
      display: none;
    }
    .nav-cta {
      display: none;
    }
    .nav-burger {
      display: inline-flex;
    }
    .mobile-nav.open {
      display: block;
    }
  }
  @media (min-width: 1024px) {
    .mobile-nav {
      display: none !important;
    }
  }

/* roulang page: category2 */
:root {
    --night: #0D1119;
    --night-soft: #151B27;
    --panel: #171F2D;
    --line: rgba(255, 255, 255, 0.08);
    --line-strong: rgba(255, 255, 255, 0.16);
    --flame: #FF5A2E;
    --flame-hover: #FF7A55;
    --mint: #00E3B6;
    --mint-soft: rgba(0, 227, 182, 0.12);
    --text-main: #EDF1F6;
    --text-sub: #A7B1BD;
    --text-dim: #788596;
    --radius-card: 16px;
    --radius-btn: 10px;
    --radius-pill: 999px;
    --shadow-panel: 0 12px 30px rgba(0, 0, 0, 0.28);
    --header-height: 72px;
  }

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

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

  body {
    margin: 0;
    background-color: var(--night);
    color: var(--text-main);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.8;
    text-rendering: optimizeLegibility;
  }

  body.menu-open {
    overflow: hidden;
  }

  h1, h2, h3, h4, p, ul, ol, dl, dd {
    margin-top: 0;
  }

  ul, ol {
    padding-left: 1.2em;
  }

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

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

  button, input, select, textarea {
    font-family: inherit;
  }

  a:focus-visible,
  button:focus-visible,
  summary:focus-visible {
    outline: 3px solid rgba(0, 227, 182, 0.85);
    outline-offset: 3px;
    border-radius: 8px;
  }

  .skip-link {
    position: fixed;
    top: -80px;
    left: 16px;
    z-index: 200;
    padding: 10px 16px;
    background: var(--mint);
    color: #081018;
    border-radius: 999px;
    font-weight: 600;
    transition: top 0.2s ease;
  }

  .skip-link:focus {
    top: 14px;
  }

  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 80;
    height: var(--header-height);
    background: #0B0F16;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  }

  .site-header::after {
    content: "";
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--flame) 0%, #FF9A55 40%, var(--mint) 100%);
  }

  .header-row {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    color: var(--text-main);
  }

  .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 11px;
    background: linear-gradient(140deg, var(--flame) 0%, #ff8a4c 100%);
    color: #fff;
    font-weight: 900;
    font-size: 15px;
    letter-spacing: -0.02em;
    box-shadow: 0 8px 18px rgba(255, 90, 46, 0.25);
  }

  .brand-name {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
    color: #fff;
    white-space: nowrap;
  }

  .small-tag {
    font-size: 12px;
    font-weight: 500;
    color: var(--mint);
    border: 1px solid rgba(0, 227, 182, 0.35);
    background: rgba(0, 227, 182, 0.08);
    border-radius: 999px;
    padding: 2px 9px;
    line-height: 1.5;
    white-space: nowrap;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-left: auto;
  }

  .nav-links a {
    position: relative;
    font-size: 15px;
    font-weight: 500;
    color: #C3CBD6;
    padding: 8px 0;
    line-height: 1;
    transition: color 0.2s ease;
  }

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

  .nav-links a.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    height: 2px;
    border-radius: 999px;
    background: var(--mint);
    box-shadow: 0 0 10px rgba(0, 227, 182, 0.65);
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 0;
    cursor: pointer;
    border-radius: 999px;
    padding: 12px 22px;
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
    white-space: nowrap;
  }

  .btn:active {
    transform: translateY(0) scale(0.98);
  }

  .btn svg {
    width: 18px;
    height: 18px;
    flex: none;
  }

  .btn-primary {
    background: var(--flame);
    color: #fff;
    box-shadow: 0 10px 24px rgba(255, 90, 46, 0.23);
  }

  .btn-primary:hover {
    background: var(--flame-hover);
    transform: translateY(-1px);
    box-shadow: 0 14px 30px rgba(255, 90, 46, 0.3);
  }

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

  .btn-download-nav {
    padding: 11px 22px;
  }

  .btn-ghost {
    background: transparent;
    color: var(--text-sub);
    border: 1px solid rgba(255, 255, 255, 0.22);
  }

  .btn-ghost:hover {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.55);
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.04);
  }

  .btn-mint {
    background: var(--mint);
    color: #0A141C;
  }

  .btn-mint:hover {
    background: #2BF5CC;
    transform: translateY(-1px);
  }

  .btn-lg {
    padding: 15px 28px;
    font-size: 16px;
  }

  .btn-sm {
    padding: 9px 15px;
    font-size: 14px;
  }

  .nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: transparent;
    color: #fff;
    cursor: pointer;
  }

  .nav-toggle svg {
    width: 22px;
    height: 22px;
    display: block;
  }

  .category-hero {
    position: relative;
    overflow: hidden;
    padding: 120px 0 72px;
    min-height: 430px;
    background-color: var(--night);
    background-image:
      linear-gradient(100deg, rgba(13, 17, 25, 0.96) 0%, rgba(13, 17, 25, 0.78) 52%, rgba(13, 17, 25, 0.6) 100%),
      url("/assets/images/backpic/back-2.webp");
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid var(--line);
  }

  .category-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(60% 70% at 18% 36%, rgba(255, 90, 46, 0.18) 0%, transparent 100%);
    pointer-events: none;
  }

  .category-hero .hero-accent {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--flame) 0%, #FF9A55 40%, var(--mint) 100%);
    opacity: 0.8;
  }

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

  .breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    color: #9AA6B2;
    font-size: 13px;
    margin-bottom: 26px;
  }

  .breadcrumb a {
    color: #9AA6B2;
    transition: color 0.2s ease;
  }

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

  .breadcrumb span {
    color: #5E6873;
  }

  .breadcrumb [aria-current="page"] {
    color: #D3D9E0;
  }

  .hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 227, 182, 0.1);
    border: 1px solid rgba(0, 227, 182, 0.3);
    color: var(--mint);
    border-radius: 999px;
    padding: 6px 13px;
    font-size: 13px;
    font-weight: 600;
  }

  .category-hero h1 {
    margin: 16px 0 16px;
    font-size: clamp(36px, 5vw, 54px);
    line-height: 1.15;
    color: #fff;
    letter-spacing: -0.015em;
  }

  .category-hero .hero-desc {
    max-width: 640px;
    margin-bottom: 26px;
    font-size: 16px;
    line-height: 1.85;
    color: var(--text-sub);
  }

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

  .hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 36px;
    margin-top: 42px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .hero-meta-item {
    color: var(--text-sub);
    font-size: 14px;
    line-height: 1.6;
  }

  .hero-meta-item strong {
    display: block;
    color: #DDE4EB;
    font-weight: 600;
    font-size: 15px;
  }

  .page-section {
    padding: 96px 0;
  }

  .section-head {
    max-width: 760px;
    margin-bottom: 42px;
  }

  .section-head.center {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
  }

  .step-label,
  .section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--mint);
    font-weight: 700;
    letter-spacing: 0.02em;
    font-size: 13px;
  }

  .section-title {
    margin: 10px 0 18px;
    font-size: clamp(28px, 3.4vw, 36px);
    line-height: 1.25;
    color: #fff;
    letter-spacing: -0.01em;
  }

  .section-title + p,
  .section-sub {
    color: var(--text-sub);
    font-size: 16px;
    line-height: 1.85;
  }

  .help-section {
    padding-top: 60px;
  }

  .help-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: stretch;
    gap: 0;
    margin-bottom: 26px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-panel);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .help-panel:hover {
    border-color: rgba(255, 122, 85, 0.45);
  }

  .help-panel.reverse .help-media {
    order: 2;
  }

  .help-media {
    position: relative;
    min-height: 280px;
    overflow: hidden;
    background: #10141D;
  }

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

  .media-note {
    position: absolute;
    left: 14px;
    bottom: 14px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(8, 12, 18, 0.86);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: #CDD5DD;
    font-size: 12px;
    border-radius: 999px;
    padding: 5px 12px;
    line-height: 1.4;
  }

  .media-note::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--mint);
    box-shadow: 0 0 10px rgba(0, 227, 182, 0.7);
  }

  .help-body {
    padding: 48px 46px;
  }

  .help-body p {
    color: var(--text-sub);
    line-height: 1.85;
    margin-bottom: 18px;
  }

  .help-body h3 {
    color: #fff;
    font-size: 21px;
    line-height: 1.4;
    margin: 6px 0 16px;
  }

  .help-body h4 {
    color: #E2E7EE;
    font-size: 16px;
    font-weight: 600;
    margin: 26px 0 10px;
  }

  .dot-list {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .dot-list li {
    position: relative;
    padding-left: 22px;
    color: var(--text-sub);
    line-height: 1.8;
    margin-bottom: 10px;
  }

  .dot-list li::before {
    content: "";
    position: absolute;
    top: 0.72em;
    left: 0;
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: var(--flame);
    box-shadow: 0 0 9px rgba(255, 90, 46, 0.6);
  }

  .dot-list strong {
    color: #DDE4EB;
    font-weight: 600;
  }

  .text-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--mint);
    font-weight: 600;
    transition: gap 0.2s ease, color 0.2s ease;
  }

  .text-link:hover {
    color: #35F4D0;
    gap: 9px;
  }

  .help-cta {
    margin-top: 28px;
  }

  .tagline-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .tagline-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--text-sub);
    line-height: 1.8;
    padding: 13px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .tagline-list li:last-child {
    border-bottom: 0;
  }

  .tagline-list strong {
    color: #DCE3EA;
    min-width: 88px;
    font-weight: 600;
  }

  .state-chip {
    flex: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--mint);
    background: var(--mint-soft);
    border: 1px solid rgba(0, 227, 182, 0.25);
    border-radius: 999px;
    padding: 3px 10px;
    font-size: 12px;
    line-height: 1.5;
  }

  .runtime-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .runtime-card {
    border: 1px solid var(--line);
    background: #151D2A;
    border-radius: 14px;
    padding: 18px;
    transition: border-color 0.2s ease, background 0.2s ease;
  }

  .runtime-card:hover {
    border-color: rgba(0, 227, 182, 0.5);
    background: #182130;
  }

  .runtime-card h4 {
    margin: 0 0 6px;
    color: #fff;
    font-size: 15px;
  }

  .runtime-card p {
    margin: 0;
    color: var(--text-sub);
    font-size: 13px;
    line-height: 1.6;
  }

  .faq-section {
    background: var(--night-soft);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 96px 0;
  }

  .faq-list {
    display: grid;
    gap: 12px;
  }

  .faq-item {
    background: #141B26;
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color 0.2s ease, background 0.2s ease;
  }

  .faq-item[open] {
    border-color: rgba(0, 227, 182, 0.32);
    background: #161F2D;
  }

  .faq-item summary {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    list-style: none;
    padding: 17px 20px;
    color: #E6EBF0;
    font-weight: 600;
    line-height: 1.5;
  }

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

  .faq-item summary:hover {
    color: #fff;
  }

  .q-icon {
    flex: none;
    position: relative;
    width: 22px;
    height: 22px;
    border: 1.5px solid rgba(255, 255, 255, 0.32);
    border-radius: 50%;
    transition: transform 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  }

  .q-icon::before,
  .q-icon::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 9px;
    height: 1.5px;
    background: rgba(255, 255, 255, 0.72);
    transform: translate(-50%, -50%);
    border-radius: 2px;
    transition: background 0.2s ease;
  }

  .q-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
  }

  .faq-item[open] .q-icon {
    transform: rotate(45deg);
    border-color: var(--flame);
  }

  .faq-item[open] .q-icon::before,
  .faq-item[open] .q-icon::after {
    background: var(--flame);
  }

  .faq-answer {
    color: var(--text-sub);
    line-height: 1.9;
    padding: 0 22px 22px;
    margin-top: -4px;
  }

  .faq-answer p {
    margin-bottom: 10px;
  }

  .cta-area {
    padding: 96px 0 56px;
  }

  .cta-box {
    position: relative;
    overflow: hidden;
    text-align: center;
    background:
      linear-gradient(rgba(13, 17, 25, 0.92), rgba(13, 17, 25, 0.84)),
      url("/assets/images/backpic/back-1.webp") center / cover no-repeat;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 56px 32px;
    box-shadow: var(--shadow-panel);
  }

  .cta-box::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--flame), #FF9A55, var(--mint));
  }

  .cta-box h2 {
    margin: 10px 0 14px;
    color: #fff;
    font-size: clamp(26px, 3.4vw, 36px);
    line-height: 1.3;
  }

  .cta-box .cta-sub {
    max-width: 640px;
    margin: 0 auto 28px;
    color: var(--text-sub);
    line-height: 1.85;
  }

  .cta-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
  }

  .page-switch {
    padding: 14px 0 96px;
  }

  .switch-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .switch-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 22px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
  }

  .switch-card:hover {
    border-color: rgba(255, 122, 85, 0.5);
    background: #1A2230;
    transform: translateY(-2px);
  }

  .switch-card .switch-label {
    color: var(--text-dim);
    font-size: 13px;
  }

  .switch-card strong {
    color: #E4E9EF;
    font-size: 18px;
    line-height: 1.4;
  }

  .switch-arrow {
    flex: none;
    color: var(--mint);
    font-size: 24px;
  }

  .site-footer {
    background: #080C12;
    border-top: 1px solid var(--line);
    border-top-color: rgba(255, 255, 255, 0.07);
    padding: 68px 0 28px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 0.8fr 0.9fr;
    gap: 44px;
    margin-bottom: 40px;
  }

  .footer-copy .brand {
    margin-bottom: 16px;
  }

  .footer-copy p {
    max-width: 440px;
    color: var(--text-sub);
    line-height: 1.85;
    margin: 14px 0 0;
  }

  .footer-col h4 {
    margin: 6px 0 16px;
    color: #fff;
    font-size: 15px;
    font-weight: 600;
  }

  .footer-col a {
    display: block;
    color: var(--text-sub);
    font-size: 14px;
    line-height: 2.2;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

  .footer-col a:hover {
    color: var(--mint);
    padding-left: 4px;
  }

  .footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    color: var(--text-dim);
    font-size: 13px;
    line-height: 1.7;
  }

  .footer-bottom p {
    margin: 0;
  }

  @media (max-width: 1024px) {
    .help-body {
      padding: 40px 34px;
    }

    .nav-links {
      gap: 22px;
    }
  }

  @media (max-width: 880px) {
    .nav-links {
      display: none;
    }

    .nav-links.mobile-open {
      display: flex;
      position: absolute;
      top: var(--header-height);
      left: 0;
      right: 0;
      z-index: 90;
      flex-direction: column;
      align-items: stretch;
      gap: 4px;
      background: #0B0F16;
      padding: 20px 24px 24px;
      border-bottom: 1px solid var(--line);
      box-shadow: 0 24px 40px rgba(0, 0, 0, 0.3);
      max-height: calc(100vh - var(--header-height));
      overflow-y: auto;
    }

    .nav-links.mobile-open a {
      padding: 13px 10px;
      font-size: 16px;
      border-radius: 10px;
      color: #C7CFD8;
    }

    .nav-links.mobile-open a:hover,
    .nav-links.mobile-open a.active {
      background: rgba(0, 227, 182, 0.08);
      color: var(--mint);
      padding-left: 16px;
    }

    .nav-links.mobile-open a.active::after {
      display: none;
    }

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

    .btn-download-nav {
      font-size: 14px;
      padding: 10px 16px;
    }

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

    .help-panel.reverse .help-media {
      order: 0;
    }

    .help-media,
    .help-media img {
      min-height: 240px;
    }

    .help-body {
      padding: 36px 30px;
    }

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

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

  @media (max-width: 640px) {
    .container {
      padding: 0 18px;
    }

    .category-hero {
      padding: 112px 0 58px;
      min-height: 0;
    }

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

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

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

    .hero-meta {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .page-section,
    .faq-section,
    .cta-area {
      padding: 64px 0;
    }

    .section-head {
      margin-bottom: 30px;
    }

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

    .help-body {
      padding: 28px 22px;
    }

    .help-media,
    .help-media img {
      min-height: 210px;
    }

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

    .cta-box {
      padding: 42px 20px;
    }

    .footer-bottom {
      flex-direction: column;
    }

    .page-switch {
      padding-bottom: 64px;
    }
  }

/* roulang page: article */
:root {
  --night: #0D1119;
  --night-soft: #151B27;
  --panel: #171F2D;
  --line: rgba(255, 255, 255, 0.08);
  --flame: #FF5A2E;
  --flame-hover: #FF7A55;
  --mint: #00E3B6;
  --text: #EDF1F6;
  --text-2: #A7B1BD;
  --text-weak: #7E8C9A;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--night);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.7;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: inline-block;
  vertical-align: middle;
}

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

button,
input,
textarea {
  font-family: inherit;
}

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

.accent-line {
  height: 2px;
  background: linear-gradient(90deg, #FF5A2E 0%, #FF9A55 40%, #00E3B6 100%);
  width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #0B0F16;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: linear-gradient(135deg, #FF5A2E 0%, #FF8A55 70%, #FFB066 100%);
  color: #ffffff;
  font-size: 16px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(255, 90, 46, 0.25);
}

.brand-name {
  font-size: 19px;
  font-weight: 800;
  color: #EDF1F6;
  white-space: nowrap;
  line-height: 1.2;
}

.small-tag {
  display: inline-block;
  margin-left: 6px;
  font-size: 11px;
  font-weight: 500;
  color: var(--mint);
  background: rgba(0, 227, 182, 0.1);
  border: 1px solid rgba(0, 227, 182, 0.25);
  padding: 1px 9px;
  border-radius: 999px;
  transform: translateY(-2px);
}

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

.nav-links a {
  position: relative;
  padding: 30px 12px 22px;
  color: #B7C0CC;
  font-size: 15.5px;
  font-weight: 500;
  transition: color 0.25s ease;
}

.nav-links a:hover {
  color: #EDF1F6;
}

.nav-links a.active {
  color: var(--mint);
  text-shadow: 0 0 18px rgba(0, 227, 182, 0.25);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 8px;
  height: 2px;
  border-radius: 2px;
  background: var(--mint);
  box-shadow: 0 0 12px rgba(0, 227, 182, 0.6);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  color: #EDF1F6;
  cursor: pointer;
  padding: 0;
}

.nav-toggle svg {
  width: 21px;
  height: 21px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  padding: 0 22px;
  height: 42px;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid rgba(0, 227, 182, 0.4);
  outline-offset: 3px;
}

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

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--flame);
  color: #ffffff;
  box-shadow: 0 8px 22px rgba(255, 90, 46, 0.2);
}

.btn-primary:hover {
  background: var(--flame-hover);
  box-shadow: 0 10px 28px rgba(255, 90, 46, 0.3);
}

.btn-primary:active {
  background: #E04F26;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.16);
  color: #D9DEE7;
}

.btn-outline:hover {
  border-color: rgba(0, 227, 182, 0.55);
  color: var(--mint);
  background: rgba(0, 227, 182, 0.06);
}

.btn-lg {
  height: 54px;
  padding: 0 34px;
  font-size: 16px;
  border-radius: 999px;
}

.btn-sm {
  height: 40px;
  padding: 0 22px;
  font-size: 14.5px;
}

.article-hero {
  background:
    radial-gradient(ellipse at 70% 0%, rgba(255, 90, 46, 0.12) 0%, rgba(13, 17, 25, 0) 52%),
    radial-gradient(ellipse at 30% 8%, rgba(0, 227, 182, 0.08) 0%, rgba(13, 17, 25, 0) 60%);
  padding: 64px 0 32px;
  border-bottom: 1px solid var(--line);
}

.article-shell {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #9AA6B2;
  margin-bottom: 26px;
}

.breadcrumb a {
  transition: color 0.2s ease;
}

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

.breadcrumb .sep {
  opacity: 0.45;
  color: #788596;
}

.breadcrumb .current {
  color: #D6DCE5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 500px;
}

.pill {
  display: inline-block;
  background: rgba(0, 227, 182, 0.1);
  border: 1px solid rgba(0, 227, 182, 0.24);
  color: var(--mint);
  border-radius: 999px;
  padding: 5px 16px;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 20px;
}

.article-title {
  font-size: clamp(32px, 4.6vw, 46px) !important;
  line-height: 1.3;
  margin: 6px 0 22px;
  font-weight: 800;
  letter-spacing: 0;
  color: #F2F5F9;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  color: #8F9AA6;
  font-size: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding-top: 18px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.meta-item svg {
  width: 17px;
  height: 17px;
  color: #6F7C8A;
}

.share-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.share-label {
  font-size: 13px;
  color: #8F9AA6;
}

.share-copy {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 34px;
  padding: 0 14px;
  font-size: 13px;
  background: rgba(255, 255, 255, 0.05);
  color: #CBD4DF;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.share-copy:hover {
  border-color: rgba(255, 90, 46, 0.5);
  color: #FF7A55;
  background: rgba(255, 90, 46, 0.06);
}

.article-main {
  padding: 48px 0 0;
}

.article-body {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px 10px;
  font-size: 17px;
  color: #E2E7EE;
}

.article-body > * {
  max-width: 100%;
}

.article-body p {
  margin: 0 0 1.45em;
  line-height: 1.85;
  color: #DDE3EB;
}

.article-body h2 {
  margin: 52px 0 24px;
  font-size: 28px;
  line-height: 1.5;
  font-weight: 800;
  color: #F2F5F9;
  padding-left: 16px;
  border-left: 3px solid var(--mint);
}

.article-body h3 {
  margin: 36px 0 16px;
  font-size: 21px;
  font-weight: 700;
  line-height: 1.6;
  color: #F2F5F9;
}

.article-body h4 {
  margin: 28px 0 14px;
  font-size: 18px;
  font-weight: 700;
  color: #E6EBF2;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.5em;
  padding-left: 1.6em;
  line-height: 1.85;
  color: #D9DFE7;
}

.article-body li {
  margin-bottom: 0.5em;
}

.article-body blockquote {
  margin: 2em 0;
  padding: 18px 24px;
  background: rgba(255, 255, 255, 0.035);
  border-left: 3px solid var(--flame);
  color: #B6C0CC;
  border-radius: 0 14px 14px 0;
  line-height: 1.85;
}

.article-body a {
  color: var(--mint);
  border-bottom: 1px solid rgba(0, 227, 182, 0.2);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.article-body a:hover {
  color: #7BFFE0;
  border-color: rgba(0, 227, 182, 0.7);
}

.article-body img {
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  margin: 2em auto;
  display: block;
}

.article-body figure {
  margin: 2em 0;
}

.article-body figcaption {
  text-align: center;
  color: #788596;
  font-size: 13.5px;
  margin-top: 10px;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  display: block;
  overflow-x: auto;
}

.article-body th,
.article-body td {
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 12px 16px;
  text-align: left;
  font-size: 15px;
}

.article-body th {
  background: var(--night-soft);
  color: #EDF1F6;
  font-weight: 600;
}

.article-foot-links {
  max-width: 780px;
  margin: 34px auto 0;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding-top: 28px;
}

.article-foot-links .label {
  color: #788596;
  font-size: 14px;
  margin-right: 6px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #C4CDD8;
  font-size: 13.5px;
  transition: all 0.2s ease;
}

.tag-chip:hover {
  border-color: var(--mint);
  color: var(--mint);
  background: rgba(0, 227, 182, 0.07);
}

.continue-section {
  background: var(--night-soft);
  padding: 78px 0 68px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.continue-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}

.continue-header h2 {
  margin: 12px 0 0;
  font-size: 30px;
  line-height: 1.3;
  font-weight: 800;
}

.continue-header p {
  margin: 0;
  color: #8F9AA6;
  font-size: 15px;
}

.section-mark {
  color: var(--mint);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.4px;
}

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

.link-card {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.link-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 90, 46, 0.6);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.28);
}

.link-card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.link-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.link-card:hover .link-card-image img {
  transform: scale(1.05);
}

.link-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.link-card-body h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.5;
  color: #F2F5F9;
}

.link-card-body p {
  margin: 4px 0 0;
  color: #93A0AD;
  font-size: 14px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.download-cta {
  padding: 82px 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(255, 90, 46, 0.12), transparent 46%),
    radial-gradient(ellipse at 80% 50%, rgba(0, 227, 182, 0.08), transparent 40%),
    var(--night);
  text-align: center;
}

.download-inner {
  max-width: 670px;
  margin: 0 auto;
  padding: 0 24px;
}

.download-inner h2 {
  font-size: 32px;
  margin: 14px 0 16px;
  color: #F4F7FA;
}

.download-inner p {
  color: #AEB8C3;
  font-size: 16px;
  margin: 0 0 28px;
  line-height: 1.8;
}

.cta-group {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 22px;
}

.version-note {
  font-size: 13px;
  color: #7A8793;
}

.empty-state {
  max-width: 640px;
  margin: 0 auto;
  padding: 96px 24px;
  text-align: center;
}

.empty-state h1 {
  font-size: 32px;
  font-weight: 800;
  color: #EDF1F6;
  margin: 22px 0 14px;
}

.empty-state p {
  color: #8F9AA6;
  font-size: 16px;
  margin-bottom: 30px;
}

.empty-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto;
  border-radius: 22px;
  background: rgba(255, 90, 46, 0.1);
  border: 1px solid rgba(255, 90, 46, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FF7A55;
}

.site-footer {
  background: #0B0F16;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 60px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-copy .brand {
  margin-bottom: 14px;
}

.footer-copy p {
  color: #8D99A6;
  font-size: 15px;
  line-height: 1.8;
  max-width: 400px;
  margin-top: 18px;
}

.footer-col h4 {
  color: #C6CFD9;
  font-size: 16px;
  font-weight: 700;
  margin: 8px 0 16px;
}

.footer-col a {
  display: block;
  color: #91A0AE;
  font-size: 14.5px;
  line-height: 1.9;
  padding: 4px 0;
  transition: color 0.2s ease, transform 0.2s ease;
}

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

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  color: #72808E;
  font-size: 13.5px;
}

.empty-main {
  max-width: 780px;
  margin: 0 auto;
}

@media (max-width: 1024px) {
  .nav-wrap {
    min-height: 70px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: #0E131C;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 24px 40px rgba(0, 0, 0, 0.35);
    padding: 14px 24px 22px;
    margin: 0;
  }

  .nav-links a {
    padding: 13px 14px;
    border-radius: 12px;
    font-size: 15px;
  }

  .nav-links a.active::after {
    left: 16px;
    width: 28px;
    right: auto;
    bottom: 8px;
  }

  .site-header.nav-open .nav-links {
    display: flex;
  }

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

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .article-hero {
    padding: 42px 0 24px;
  }

  .article-main {
    padding-top: 16px;
  }

  .article-title {
    font-size: 30px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-copy p {
    max-width: 100%;
  }

  .continue-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-meta {
    flex-direction: row;
    gap: 12px 18px;
  }

  .share-group {
    width: 100%;
    margin-left: 0;
  }
}

@media (max-width: 640px) {
  .nav-actions .btn-nav-text {
    display: none;
  }

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

  .btn-lg {
    width: 100%;
    padding-left: 16px;
    padding-right: 16px;
  }

  .footer-bottom {
    flex-direction: column-reverse;
    align-items: flex-start;
  }

  .article-body {
    font-size: 16px;
  }

  .article-body h2 {
    font-size: 24px;
  }

  .continue-header h2 {
    font-size: 26px;
  }
}

@media (max-width: 520px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .article-shell {
    padding: 0 18px;
  }

  .article-body {
    padding-left: 18px;
    padding-right: 18px;
  }

  .article-foot-links {
    padding-left: 18px;
    padding-right: 18px;
  }

  .brand-name {
    font-size: 17px;
  }

  .small-tag {
    display: none;
  }

  .breadcrumb .current {
    max-width: 230px;
  }
}

/* roulang page: category1 */
:root{
  --night:#0D1119;
  --night-soft:#151B27;
  --night-deep:#0B0F16;
  --panel:#171F2D;
  --flame:#FF5A2E;
  --flame-hover:#FF7A55;
  --mint:#00E3B6;
  --text:#EDF1F6;
  --text-2:#A7B1BD;
  --text-3:#788596;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 12px 30px rgba(0,0,0,.28);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--night);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}

/* ---------- 顶部渐变线 ---------- */
.top-glow{height:2px;background:linear-gradient(90deg,#FF5A2E 0%,#FF9A55 40%,#00E3B6 100%);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,15,22,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;color:#fff;
  background:linear-gradient(140deg,#FF5A2E 0%,#FF7A55 60%,#FFA06E 100%);
  box-shadow:0 6px 18px rgba(255,90,46,.28);
  letter-spacing:.5px;
}
.brand-name{
  display:inline-flex;align-items:center;gap:8px;
  font-size:19px;font-weight:700;color:var(--text);white-space:nowrap;
}
.small-tag{
  font-size:11px;font-weight:600;color:var(--mint);
  border:1px solid rgba(0,227,182,.4);
  background:rgba(0,227,182,.08);
  border-radius:999px;padding:1px 8px;line-height:18px;
}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  position:relative;
  display:inline-block;padding:8px 14px;border-radius:10px;
  font-size:15.5px;color:var(--text-2);
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.05);}
.nav-links a.active{color:var(--mint);}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--mint);border-radius:2px;
  box-shadow:0 0 10px rgba(0,227,182,.7);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--flame);color:#fff;font-weight:700;font-size:15px;
  padding:11px 22px;border-radius:999px;
  box-shadow:0 8px 22px rgba(255,90,46,.3);
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{background:var(--flame-hover);transform:translateY(-1px);box-shadow:0 10px 26px rgba(255,90,46,.42);}
.nav-cta:active{transform:translateY(0);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line-strong);align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ---------- 面包屑 ---------- */
.crumb{font-size:13.5px;color:#9AA6B2;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.crumb a{color:#9AA6B2;transition:color .2s ease;}
.crumb a:hover{color:var(--mint);}
.crumb .sep{color:#4C5766;}
.crumb .current{color:var(--text);}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  min-height:420px;display:flex;align-items:center;
  background:var(--night-soft);
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.34;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(900px 420px at 12% 55%,rgba(13,17,25,.96) 0%,rgba(13,17,25,.78) 45%,rgba(13,17,25,.45) 100%);
}
.cat-hero .hero-inner{position:relative;z-index:2;padding:74px 0 68px;max-width:720px;}
.cat-hero h1{
  font-size:clamp(32px,4.4vw,46px);
  margin-top:18px;margin-bottom:16px;
}
.cat-hero .hero-desc{
  color:var(--text-2);font-size:16.5px;line-height:1.85;max-width:600px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:15.5px;font-weight:700;padding:13px 26px;border-radius:12px;
  transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease,color .2s ease;
}
.btn-primary{background:var(--flame);color:#fff;box-shadow:0 10px 26px rgba(255,90,46,.3);}
.btn-primary:hover{background:var(--flame-hover);transform:translateY(-1px);box-shadow:0 14px 30px rgba(255,90,46,.42);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  border:1px solid var(--line-strong);color:var(--text-2);background:rgba(255,255,255,.02);
}
.btn-ghost:hover{color:var(--mint);border-color:rgba(0,227,182,.5);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.hero-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.pill{
  font-size:12.5px;color:var(--text-2);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  border-radius:999px;padding:5px 13px;
}
.pill.mint{color:var(--mint);border-color:rgba(0,227,182,.36);background:rgba(0,227,182,.07);}

/* ---------- 板块通用 ---------- */
.section{padding:80px 0;}
.section.alt{background:var(--night-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:36px;}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--mint);letter-spacing:1px;
}
.section-tag::before{content:"";width:22px;height:2px;background:var(--mint);border-radius:2px;}
.section-head h2{font-size:clamp(24px,3vw,31px);margin-top:14px;}
.section-head p{color:var(--text-2);margin-top:14px;line-height:1.85;}

.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  transition:border-color .25s ease,transform .25s ease;
}
.card:hover{border-color:rgba(255,90,46,.5);transform:translateY(-2px);}
.card-pad{padding:26px;}

/* ---------- 准备清单 ---------- */
.prep-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.prep-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;transition:border-color .25s ease,transform .25s ease;
}
.prep-item:hover{border-color:rgba(0,227,182,.45);transform:translateY(-3px);}
.prep-item .idx{
  font-size:12.5px;font-weight:700;color:var(--mint);letter-spacing:1px;
}
.prep-item h3{font-size:18px;margin:12px 0 10px;}
.prep-item p{color:var(--text-3);font-size:14.5px;line-height:1.75;}

/* ---------- 步骤流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;}
.steps::before{
  content:"";position:absolute;top:34px;left:6%;right:6%;height:2px;
  background:linear-gradient(90deg,#FF5A2E 0%,#FF9A55 40%,#00E3B6 100%);
  opacity:.5;
}
.step{position:relative;z-index:1;}
.step .num{
  width:56px;height:56px;border-radius:999px;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:800;color:#fff;
  background:var(--night-deep);border:2px solid var(--flame);
  box-shadow:0 0 0 6px rgba(13,17,25,.9);
}
.step:nth-child(3) .num{border-color:#FF9A55;}
.step:nth-child(4) .num{border-color:var(--mint);}
.step h3{font-size:19px;margin:18px 0 10px;}
.step p{color:var(--text-2);font-size:14.8px;line-height:1.8;}
.step .thumb{
  margin-top:16px;border-radius:var(--radius-sm);overflow:hidden;
  border:1px solid var(--line);background:var(--panel);
}
.step .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;}

/* ---------- 图文两栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:38px;align-items:center;}
.split-media{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.split-media img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.split h2{font-size:clamp(23px,2.8vw,30px);}
.split p{color:var(--text-2);margin-top:16px;}
.check-list{margin-top:22px;display:grid;gap:12px;}
.check-list li{display:flex;gap:11px;align-items:flex-start;color:var(--text-2);font-size:15px;}
.check-list li::before{
  content:"";flex:0 0 auto;width:8px;height:8px;margin-top:9px;border-radius:999px;
  background:var(--mint);box-shadow:0 0 8px rgba(0,227,182,.7);
}

/* ---------- 误区列表 ---------- */
.myth-list{display:grid;gap:14px;}
.myth{
  display:grid;grid-template-columns:180px 1fr;gap:22px;align-items:start;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;transition:border-color .25s ease;
}
.myth:hover{border-color:rgba(255,154,85,.5);}
.myth h3{font-size:18px;color:var(--text);}
.myth p{color:var(--text-2);font-size:15px;line-height:1.8;}
.myth .tag{font-size:12.5px;color:var(--flame);font-weight:700;display:block;margin-bottom:6px;}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;gap:14px;max-width:900px;}
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  overflow:hidden;transition:border-color .25s ease;
}
.faq-item[open]{border-color:rgba(0,227,182,.4);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;
  padding:19px 22px;font-size:16.5px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-q{
  flex:0 0 auto;font-size:13px;font-weight:800;color:var(--mint);
  border:1px solid rgba(0,227,182,.42);background:rgba(0,227,182,.08);
  border-radius:8px;padding:1px 7px;line-height:20px;
}
.faq-icon{
  flex:0 0 auto;margin-left:auto;width:20px;height:20px;position:relative;
  transition:transform .25s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--mint);border-radius:2px;
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px;}
.faq-icon::after{left:9px;top:0;width:2px;height:20px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-a{padding:0 22px 20px 22px;color:var(--text-2);font-size:15px;line-height:1.85;}
.faq-a p+p{margin-top:1.2em;}

/* ---------- 下一页 ---------- */
.next-card{
  display:grid;grid-template-columns:1fr 300px;gap:0;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);
}
.next-card .txt{padding:34px 32px;}
.next-card h2{font-size:clamp(22px,2.6vw,28px);}
.next-card p{color:var(--text-2);margin-top:14px;max-width:560px;}
.next-card .media img{width:100%;height:100%;min-height:200px;object-fit:cover;}
.next-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:22px;
  color:var(--mint);font-weight:700;font-size:15.5px;
  transition:gap .2s ease,color .2s ease;
}
.next-link:hover{gap:13px;color:#5ff5d4;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:20px;
  background:linear-gradient(120deg,#181F2E 0%,#12192a 60%,#101726 100%);
  padding:44px 40px;
}
.cta-band::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,#FF5A2E 0%,#FF9A55 40%,#00E3B6 100%);
}
.cta-band .inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;}
.cta-band h2{font-size:clamp(22px,2.6vw,28px);}
.cta-band p{color:var(--text-2);margin-top:12px;max-width:600px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--night-deep);
  border-top:1px solid var(--line);
  padding:64px 0 26px;margin-top:24px;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;
  padding-bottom:36px;border-bottom:1px solid var(--line);
}
.footer-copy p{color:var(--text-3);font-size:14.5px;margin-top:16px;max-width:460px;line-height:1.85;}
.footer-col h4{font-size:15px;color:var(--text);margin-bottom:16px;}
.footer-col a{
  display:block;color:var(--text-3);font-size:14.5px;padding:5px 0;
  transition:color .2s ease,transform .2s ease;
}
.footer-col a:hover{color:var(--mint);transform:translateX(3px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  padding-top:22px;color:var(--text-3);font-size:13.5px;
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .prep-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .steps::before{display:none;}
  .split{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .next-card{grid-template-columns:1fr;}
  .next-card .media img{min-height:180px;}
}
@media (max-width:768px){
  .nav-links{
    position:absolute;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(11,15,22,.99);border-bottom:1px solid var(--line);
    padding:12px 20px 18px;display:none;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:12px 14px;font-size:16px;}
  .nav-links a.active::after{left:14px;right:auto;width:26px;bottom:6px;}
  .nav-toggle{display:inline-flex;}
  .nav-cta{padding:9px 16px;font-size:14px;}
  .section{padding:60px 0;}
  .cat-hero .hero-inner{padding:56px 0 52px;}
  .myth{grid-template-columns:1fr;gap:10px;}
  .cta-band{padding:32px 22px;}
}
@media (max-width:520px){
  .prep-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .brand-name{font-size:17px;}
  .small-tag{display:none;}
  .hero-actions .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .section-head h2{font-size:24px;}
}