/* roulang page: index */
:root{
    --c-ink:#0C0A1F;
    --c-ink-2:#171338;
    --c-primary:#6A4DF0;
    --c-primary-deep:#3E2AA8;
    --c-accent:#FF8A4C;
    --c-aqua:#4FD8C4;
    --c-bg:#FAF9FF;
    --c-surface:#FFFFFF;
    --c-line:#E7E3F5;
    --c-text:#1B1636;
    --c-muted:#6B6488;
    --c-on-dark:#EDE9FF;
    --c-on-dark-muted:#A79FC7;

    --sh-1:0 1px 2px rgba(12,10,31,.04);
    --sh-2:0 10px 30px -12px rgba(12,10,31,.18);
    --sh-3:0 24px 60px -20px rgba(12,10,31,.28);

    --r-card:16px;
    --r-hero:24px;
    --r-btn:12px;

    --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
    --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
    --font-num:"Inter","Helvetica Neue",Helvetica,Arial,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font-sans);
    font-size:16.5px;
    line-height:1.85;
    color:var(--c-text);
    background:var(--c-bg);
    overflow-x:hidden;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button,input{font:inherit;color:inherit}
  h1,h2,h3,h4{font-family:var(--font-serif);margin:0;font-weight:700;color:var(--c-text);letter-spacing:.01em}
  p{margin:0}
  ul,ol{margin:0;padding:0;list-style:none}
  :focus-visible{outline:3px solid rgba(106,77,240,.4);outline-offset:2px;border-radius:10px}
  .tabular{font-family:var(--font-num);font-variant-numeric:tabular-nums}

  .container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.container{padding:0 32px}}

  .section{padding:64px 0}
  @media (min-width:768px){.section{padding:96px 0}}
  .section-tight{padding:48px 0}
  @media (min-width:768px){.section-tight{padding:64px 0}}

  /* ---------- 星点与星轨装饰 ---------- */
  .starfield{position:absolute;inset:0;pointer-events:none;opacity:.35;
    background-image:
      radial-gradient(1.4px 1.4px at 12% 22%, rgba(237,233,255,.95), transparent 60%),
      radial-gradient(1.2px 1.2px at 34% 68%, rgba(237,233,255,.75), transparent 60%),
      radial-gradient(1.6px 1.6px at 62% 18%, rgba(237,233,255,.9), transparent 60%),
      radial-gradient(1.1px 1.1px at 78% 54%, rgba(237,233,255,.7), transparent 60%),
      radial-gradient(1.3px 1.3px at 88% 82%, rgba(237,233,255,.8), transparent 60%),
      radial-gradient(1.1px 1.1px at 46% 88%, rgba(237,233,255,.6), transparent 60%),
      radial-gradient(1.2px 1.2px at 22% 46%, rgba(237,233,255,.65), transparent 60%);
  }
  .starfield-soft{opacity:.22}
  .orbit{position:absolute;border-radius:50%;pointer-events:none;
    border:1px solid rgba(79,216,196,.32);
    border-right-color:transparent;border-bottom-color:transparent}
  .orbit-a{width:420px;height:420px;right:-120px;top:-140px;transform:rotate(24deg)}
  .orbit-b{width:260px;height:260px;left:-90px;bottom:-110px;transform:rotate(-160deg);
    border-color:rgba(255,138,76,.28);border-left-color:transparent;border-top-color:transparent}

  .dark-band{position:relative;overflow:hidden;background:var(--c-ink);color:var(--c-on-dark)}

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;height:64px;
    display:flex;align-items:center;
    background:transparent;border-bottom:1px solid transparent;
    transition:height .2s ease,background .2s ease,border-color .2s ease;
  }
  .site-header.is-scrolled{
    height:56px;
    background:rgba(12,10,31,.88);
    -webkit-backdrop-filter:blur(8px);
    backdrop-filter:blur(8px);
    border-bottom-color:rgba(255,255,255,.08);
  }
  .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%}
  .nav-left{display:flex;align-items:center;gap:28px;min-width:0}
  .brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-on-dark)}
  .brand-mark{
    width:32px;height:32px;flex:0 0 32px;border-radius:8px;
    display:grid;place-items:center;
    background:var(--c-primary-deep);
    border:1px solid rgba(237,233,255,.22);
    color:#fff;font-family:var(--font-serif);font-size:15px;font-weight:700;
  }
  .brand-name{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
  .nav-links{display:none;align-items:center;gap:4px}
  @media (min-width:1024px){.nav-links{display:flex}}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;
    border-radius:10px;font-size:15px;color:var(--c-on-dark-muted);
    transition:color .18s ease,background .18s ease;
  }
  .nav-link:hover{color:var(--c-on-dark);background:rgba(255,255,255,.07)}
  .nav-link.is-active{color:#fff;font-weight:600}
  .nav-link.is-active::after{
    content:'';position:absolute;left:14px;right:14px;bottom:3px;height:2px;
    background:var(--c-accent);border-radius:2px;
  }
  .nav-right{display:flex;align-items:center;gap:10px}
  .nav-divider{display:none;width:1px;height:22px;background:rgba(237,233,255,.18)}
  @media (min-width:1024px){.nav-divider{display:block}}
  .icon-btn{
    width:40px;height:40px;border-radius:10px;display:grid;place-items:center;
    background:transparent;border:1px solid rgba(237,233,255,.16);color:var(--c-on-dark);
    cursor:pointer;transition:background .18s ease,border-color .18s ease;
  }
  .icon-btn:hover{background:rgba(106,77,240,.24);border-color:rgba(106,77,240,.7)}
  .menu-toggle{display:grid}
  @media (min-width:1024px){.menu-toggle{display:none}}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
    transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
    white-space:nowrap;
  }
  .btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px}
  .btn-primary{background:var(--c-primary);color:#fff}
  .btn-primary:hover{background:#7B60F5;transform:translateY(-1px);box-shadow:0 12px 26px -12px rgba(106,77,240,.75)}
  .btn-primary:active{transform:translateY(1px);box-shadow:none}
  .btn-ghost{background:transparent;border-color:rgba(237,233,255,.3);color:var(--c-on-dark)}
  .btn-ghost:hover{background:rgba(106,77,240,.2);border-color:var(--c-primary);color:#fff}
  .btn-outline{background:transparent;border-color:var(--c-line);color:var(--c-text)}
  .btn-outline:hover{background:rgba(106,77,240,.07);border-color:var(--c-primary);color:var(--c-primary)}
  .btn-accent{background:var(--c-accent);color:#2A1500}
  .btn-accent:hover{background:#FF9A63;transform:translateY(-1px);box-shadow:0 12px 26px -12px rgba(255,138,76,.7)}
  .btn-accent:active{transform:translateY(1px)}

  .link-plain{color:var(--c-primary);border-bottom:1px solid rgba(106,77,240,.4);transition:border-color .18s ease}
  .link-plain:hover{border-color:var(--c-primary)}

  /* ---------- 徽章 / 标签 ---------- */
  .badge{
    display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
    font-size:12.5px;font-weight:600;line-height:1;
    background:rgba(106,77,240,.1);color:var(--c-primary);white-space:nowrap;
  }
  .badge-accent{background:rgba(255,138,76,.1);color:#A8450D;border:1px solid rgba(255,138,76,.42)}
  .badge-aqua{background:rgba(79,216,196,.14);color:#12705F}
  .badge-dark{background:rgba(255,255,255,.08);color:var(--c-on-dark);border:1px solid rgba(255,255,255,.14)}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--c-primary);
  }
  .eyebrow::before{content:'';width:6px;height:6px;border-radius:1px;background:var(--c-accent)}
  .eyebrow-dark{color:var(--c-aqua)}
  .eyebrow-dark::before{background:var(--c-accent)}

  .section-head{max-width:760px}
  .section-title{font-size:clamp(24px,3vw,34px);line-height:1.3;margin-top:14px}
  .section-sub{margin-top:14px;color:var(--c-muted);font-size:16px;line-height:1.85}

  /* ---------- Hero ---------- */
  .hero{margin-top:-64px;padding:132px 0 68px;position:relative}
  @media (min-width:1024px){.hero{padding:156px 0 88px}}
  .hero-copy{position:relative;z-index:2}
  .hero-title{
    margin-top:18px;
    font-size:clamp(34px,4.6vw,58px);
    line-height:1.15;
    color:#fff;
    max-width:12em;
  }
  .hero-sub{margin-top:20px;font-size:17px;line-height:1.85;color:var(--c-on-dark-muted);max-width:30em}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
  .hero-tags li{
    display:inline-flex;align-items:center;gap:7px;height:30px;padding:0 14px;border-radius:999px;
    font-size:13px;color:var(--c-on-dark);
    background:rgba(255,255,255,.06);border:1px solid rgba(237,233,255,.14);
  }
  .hero-tags li::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--c-aqua)}
  .hero-visual{position:relative;z-index:2;margin-top:44px}
  @media (min-width:1024px){.hero-visual{margin-top:0}}
  .hero-frame{
    position:relative;border-radius:var(--r-hero);overflow:hidden;
    border:1px solid rgba(237,233,255,.14);
    box-shadow:var(--sh-3);
    aspect-ratio:16/10;background:var(--c-ink-2);
  }
  .hero-frame img{width:100%;height:100%;object-fit:cover;opacity:.92}
  .hero-hud{
    position:absolute;left:16px;bottom:16px;right:16px;
    display:flex;align-items:center;gap:12px;flex-wrap:wrap;
    padding:12px 16px;border-radius:14px;
    background:rgba(12,10,31,.78);
    -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
    border:1px solid rgba(237,233,255,.12);
    font-size:13px;color:var(--c-on-dark);
  }
  .hud-dot{width:8px;height:8px;border-radius:50%;background:var(--c-accent);box-shadow:0 0 0 4px rgba(255,138,76,.18)}
  .hud-sep{width:1px;height:14px;background:rgba(237,233,255,.2)}

  /* ---------- 品牌主张条（编号错位） ---------- */
  .claim-band{display:grid;gap:16px}
  @media (min-width:1024px){.claim-band{grid-template-columns:repeat(3,1fr);gap:28px;align-items:start}}
  .claim-item{
    position:relative;padding:26px 24px 24px;border-radius:var(--r-card);
    background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--sh-1);
    transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
  }
  .claim-item:hover{box-shadow:var(--sh-2);border-color:rgba(106,77,240,.3);transform:translateY(-2px)}
  .claim-item:nth-child(2){border-top:3px solid var(--c-accent)}
  .claim-item:nth-child(3){border-top:3px solid var(--c-aqua)}
  @media (min-width:1024px){
    .claim-item:nth-child(2){margin-top:28px}
    .claim-item:nth-child(3){margin-top:56px}
  }
  .claim-num{font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--c-primary)}
  .claim-title{font-size:20px;line-height:1.4;margin-top:12px}
  .claim-text{margin-top:10px;font-size:15px;line-height:1.8;color:var(--c-muted)}

  /* ---------- 故事 / 时间轴 ---------- */
  .story-grid{display:grid;gap:36px;align-items:center}
  @media (min-width:1024px){.story-grid{grid-template-columns:1fr 1fr;gap:56px}}
  .story-figure{border-radius:var(--r-hero);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--sh-2);aspect-ratio:4/3;background:var(--c-surface)}
  .story-figure img{width:100%;height:100%;object-fit:cover}
  .timeline{margin-top:28px;border-left:1px solid var(--c-line);padding-left:22px}
  .timeline li{position:relative;padding:0 0 22px}
  .timeline li:last-child{padding-bottom:0}
  .timeline li::before{
    content:'';position:absolute;left:-27px;top:9px;width:9px;height:9px;border-radius:50%;
    background:var(--c-surface);border:2px solid var(--c-primary);
  }
  .timeline li:nth-child(2)::before{border-color:var(--c-accent)}
  .timeline li:nth-child(3)::before{border-color:var(--c-aqua)}
  .timeline-year{font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--c-primary);letter-spacing:.06em}
  .timeline-title{font-size:17px;margin-top:4px}
  .timeline-text{margin-top:6px;font-size:14.5px;line-height:1.75;color:var(--c-muted)}

  /* ---------- 精选拼贴 ---------- */
  .pick-grid{display:grid;gap:20px;margin-top:36px}
  @media (min-width:768px){.pick-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
  .card{
    display:flex;flex-direction:column;background:var(--c-surface);
    border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
    box-shadow:var(--sh-1);transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
  }
  .card:hover{box-shadow:var(--sh-2);border-color:rgba(106,77,240,.3);transform:translateY(-2px)}
  .card-media{overflow:hidden;aspect-ratio:16/10;background:var(--c-ink-2)}
  .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease}
  .card:hover .card-media img{transform:scale(1.03)}
  .card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
  .card-title{font-size:20px;line-height:1.42}
  .card-title-sm{font-size:17px}
  .card-desc{font-size:14.5px;line-height:1.7;color:var(--c-muted);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
    font-size:13px;color:var(--c-muted)}
  .pick-main{grid-column:auto}
  @media (min-width:768px){
    .pick-main{grid-column:span 2;grid-row:span 2}
    .pick-main .card-media{aspect-ratio:16/9}
    .pick-main .card-body{padding:28px 28px 30px}
    .pick-main .card-title{font-size:26px}
    .pick-main .card-desc{-webkit-line-clamp:3;font-size:15px}
  }

  /* ---------- 最新信息（CMS 循环区） ---------- */
  .news-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px}
  .news-grid{display:grid;gap:16px;margin-top:34px}
  @media (min-width:1024px){.news-grid{grid-template-columns:1fr 1fr;gap:20px 24px}}
  .news-item{
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--sh-1);transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
  }
  .news-item:hover{box-shadow:var(--sh-2);border-color:rgba(106,77,240,.3);transform:translateY(-2px)}
  .news-link{display:block;padding:20px 22px}
  .news-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px}
  .news-time{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:13px;color:var(--c-muted)}
  .news-title{
    font-size:18px;line-height:1.45;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .news-desc{
    margin-top:10px;font-size:14.5px;line-height:1.7;color:var(--c-muted);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .news-more{display:inline-block;margin-top:14px;font-size:13.5px;font-weight:600;color:var(--c-primary)}
  .news-more::after{content:'→';margin-left:6px;transition:margin-left .18s ease}
  .news-item:hover .news-more::after{margin-left:10px}
  .news-empty{
    margin-top:34px;padding:48px 24px;text-align:center;
    background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-card);
  }
  .empty-orbit{
    display:block;width:44px;height:44px;margin:0 auto 18px;border-radius:50%;
    border:1px solid rgba(106,77,240,.5);border-right-color:transparent;border-bottom-color:transparent;
    transform:rotate(30deg);
  }
  .news-empty p{color:var(--c-muted);font-size:15px}
  .news-empty .link-plain{display:inline-block;margin-top:14px;font-size:14.5px}

  /* ---------- FAQ ---------- */
  .faq-list{max-width:760px;margin-top:34px;display:grid;gap:12px}
  .faq-item{
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item.is-open{border-color:rgba(106,77,240,.3);box-shadow:var(--sh-2)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;background:transparent;border:0;cursor:pointer;text-align:left;
    font-family:var(--font-serif);font-size:17px;font-weight:600;color:var(--c-text);line-height:1.5;
  }
  .faq-icon{
    position:relative;flex:0 0 28px;width:28px;height:28px;border-radius:50%;
    background:rgba(106,77,240,.12);
  }
  .faq-icon::before,.faq-icon::after{
    content:'';position:absolute;left:50%;top:50%;background:var(--c-primary);
    transform:translate(-50%,-50%);transition:transform .2s ease,opacity .2s ease;
  }
  .faq-icon::before{width:12px;height:2px}
  .faq-icon::after{width:2px;height:12px}
  .faq-item.is-open .faq-icon::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease}
  .faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--c-muted)}

  /* ---------- 数据指标 ---------- */
  .stat-grid{display:grid;gap:20px;margin-top:34px}
  @media (min-width:640px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.stat-grid{grid-template-columns:repeat(4,1fr);gap:24px}}
  .stat-item{
    padding:24px 22px;border-radius:var(--r-card);
    background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--sh-1);
    border-left:3px solid var(--c-primary);
  }
  .stat-item:nth-child(2){border-left-color:var(--c-accent)}
  .stat-item:nth-child(3){border-left-color:var(--c-aqua)}
  .stat-item:nth-child(4){border-left-color:var(--c-primary-deep)}
  .stat-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:clamp(30px,3.4vw,40px);font-weight:700;line-height:1.1;color:var(--c-text)}
  .stat-num span{font-size:16px;color:var(--c-primary);margin-left:4px}
  .stat-label{margin-top:8px;font-size:14.5px;color:var(--c-muted)}
  .stat-note{
    margin-top:26px;padding:18px 22px;border-radius:var(--r-card);
    background:rgba(106,77,240,.06);border:1px solid rgba(106,77,240,.16);
    font-size:14.5px;color:var(--c-text);
  }

  /* ---------- 订阅 CTA ---------- */
  .cta-band{margin-top:0;padding:72px 0;position:relative}
  @media (min-width:768px){.cta-band{padding:96px 0}}
  .cta-grid{display:grid;gap:34px;align-items:center}
  @media (min-width:1024px){.cta-grid{grid-template-columns:1.05fr .95fr;gap:56px}}
  .cta-title{color:#fff;font-size:clamp(26px,3.2vw,38px);line-height:1.28;margin-top:16px}
  .cta-text{margin-top:16px;font-size:16px;line-height:1.85;color:var(--c-on-dark-muted);max-width:34em}
  .subscribe-form{display:flex;gap:10px;flex-wrap:wrap}
  .subscribe-input{
    flex:1 1 240px;height:48px;padding:0 16px;border-radius:var(--r-btn);
    background:rgba(255,255,255,.06);border:1px solid rgba(237,233,255,.2);
    color:var(--c-on-dark);font-size:15px;transition:border-color .18s ease,box-shadow .18s ease;
  }
  .subscribe-input::placeholder{color:rgba(167,159,199,.9)}
  .subscribe-input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(106,77,240,.28)}
  .form-feedback{margin-top:12px;font-size:13.5px;color:var(--c-on-dark-muted);min-height:20px}
  .form-feedback.is-ok{color:var(--c-aqua)}
  .cta-panel{
    padding:28px;border-radius:var(--r-hero);
    background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  }
  .cta-panel h3{color:#fff;font-size:19px}
  .cta-panel ul{margin-top:16px;display:grid;gap:12px}
  .cta-panel li{display:flex;gap:10px;font-size:14.5px;color:var(--c-on-dark);line-height:1.7}
  .cta-panel li::before{content:'';flex:0 0 6px;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--c-accent)}

  /* ---------- 页脚 ---------- */
  .site-footer{position:relative;background:var(--c-ink);color:var(--c-on-dark-muted);padding:64px 0 28px;overflow:hidden}
  .footer-grid{position:relative;z-index:2;display:grid;gap:34px}
  @media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}}
  .brand-footer{margin-bottom:16px}
  .footer-desc{font-size:14.5px;line-height:1.8;max-width:26em}
  .footer-col h3{font-family:var(--font-serif);font-size:15px;color:var(--c-on-dark);margin-bottom:16px}
  .footer-col a,.footer-col p{display:block;font-size:14.5px;line-height:1.9;color:var(--c-on-dark-muted);transition:color .18s ease}
  .footer-col a:hover{color:var(--c-aqua)}
  .footer-bottom{
    position:relative;z-index:2;margin-top:44px;padding-top:20px;
    border-top:1px solid rgba(237,233,255,.1);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:13px;color:rgba(167,159,199,.85);
  }
  .footer-orbit{
    position:absolute;left:-60px;bottom:-120px;width:340px;height:340px;border-radius:50%;
    border:1px solid rgba(79,216,196,.18);border-top-color:transparent;border-right-color:transparent;
    pointer-events:none;
  }

  /* ---------- 移动抽屉 ---------- */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(12,10,31,.6);opacity:0;visibility:hidden;
    transition:opacity .2s ease,visibility .2s ease;z-index:70;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:80;
    background:var(--c-ink-2);border-left:1px solid rgba(237,233,255,.1);
    padding:24px 22px;display:flex;flex-direction:column;gap:8px;
    transform:translateX(102%);transition:transform .22s ease;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    min-height:48px;padding:0 14px;border-radius:12px;
    color:var(--c-on-dark);font-size:15.5px;border:1px solid transparent;
    transition:background .18s ease,border-color .18s ease;
  }
  .drawer-link:hover,.drawer-link.is-active{background:rgba(106,77,240,.18);border-color:rgba(106,77,240,.4)}
  .drawer-cta{margin-top:auto}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* roulang page: article */
:root{
    --c-ink:#0C0A1F;
    --c-ink-2:#171338;
    --c-primary:#6A4DF0;
    --c-primary-deep:#3E2AA8;
    --c-accent:#FF8A4C;
    --c-aqua:#4FD8C4;
    --c-bg:#FAF9FF;
    --c-surface:#FFFFFF;
    --c-line:#E7E3F5;
    --c-text:#1B1636;
    --c-muted:#6B6488;
    --c-on-dark:#EDE9FF;
    --c-on-dark-muted:#A79FC7;
    --sh-1:0 1px 2px rgba(12,10,31,.04);
    --sh-2:0 10px 30px -12px rgba(12,10,31,.18);
    --sh-3:0 24px 60px -20px rgba(12,10,31,.28);
    --r-card:16px;
    --r-lg:24px;
    --r-btn:12px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--c-bg);
    color:var(--c-text);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;}
  h1,h2,h3,h4{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;font-weight:700;line-height:1.25;margin:0;letter-spacing:.01em;}
  p{margin:0 0 1em;}
  ul,ol{margin:0;padding:0;}
  .num{font-family:Inter,"Helvetica Neue",Arial,sans-serif;font-variant-numeric:tabular-nums;}

  body .container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}

  /* ---------- 星点纹理与装饰 ---------- */
  .starfield{
    position:absolute;inset:0;pointer-events:none;opacity:.32;
    background-image:
      radial-gradient(1.6px 1.6px at 12% 24%, #fff, transparent),
      radial-gradient(1.1px 1.1px at 28% 68%, #fff, transparent),
      radial-gradient(1.4px 1.4px at 46% 18%, #fff, transparent),
      radial-gradient(1px 1px at 62% 54%, #fff, transparent),
      radial-gradient(1.5px 1.5px at 78% 32%, #fff, transparent),
      radial-gradient(1.1px 1.1px at 88% 74%, #fff, transparent),
      radial-gradient(1.2px 1.2px at 36% 88%, #fff, transparent),
      radial-gradient(1px 1px at 70% 84%, #fff, transparent);
    background-repeat:no-repeat;
  }
  .starfield-soft{opacity:.22;}

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:90;
    height:64px;
    transition:height .25s ease, background-color .25s ease, border-color .25s ease, box-shadow .25s ease;
    border-bottom:1px solid transparent;
  }
  .site-header.is-scrolled{
    height:56px;
    background:rgba(250,249,255,.92);
    -webkit-backdrop-filter:blur(8px);
    backdrop-filter:blur(8px);
    border-bottom-color:var(--c-line);
    box-shadow:0 6px 20px -18px rgba(12,10,31,.5);
  }
  .header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:100%;position:relative;}
  .header-side{display:flex;align-items:center;gap:12px;min-width:0;}
  .header-left{gap:26px;}

  .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;min-height:44px;}
  .brand-mark{
    width:34px;height:34px;flex-shrink:0;border-radius:10px;
    display:grid;place-items:center;
    font-family:"Noto Serif SC","Songti SC",serif;font-size:18px;color:#fff;
    background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
    border:1px solid rgba(255,255,255,.18);
  }
  .brand-name{
    font-family:"Noto Serif SC","Songti SC",serif;
    font-size:17px;font-weight:700;letter-spacing:.02em;
    color:var(--c-on-dark);white-space:nowrap;
    transition:color .25s ease;
  }
  .is-scrolled .brand-name{color:var(--c-text);}

  .nav-links{display:none;align-items:center;gap:2px;}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;
    height:44px;padding:0 14px;border-radius:10px;
    font-size:15px;color:var(--c-on-dark-muted);
    transition:color .2s ease, background-color .2s ease;
  }
  .nav-link:hover{color:var(--c-on-dark);background:rgba(255,255,255,.08);}
  .nav-link:focus-visible{outline:3px solid rgba(106,77,240,.5);outline-offset:2px;}
  .nav-link.is-active{color:#fff;font-weight:600;}
  .nav-link.is-active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
    background:var(--c-accent);border-radius:2px;
  }
  .is-scrolled .nav-link{color:var(--c-muted);}
  .is-scrolled .nav-link:hover{color:var(--c-text);background:rgba(106,77,240,.08);}
  .is-scrolled .nav-link.is-active{color:var(--c-primary);}
  .is-scrolled .nav-link.is-active::after{background:var(--c-primary);}

  .icon-btn{
    width:44px;height:44px;display:grid;place-items:center;cursor:pointer;
    border-radius:12px;border:1px solid rgba(255,255,255,.18);
    background:rgba(255,255,255,.06);color:var(--c-on-dark);
    transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .18s ease;
  }
  .icon-btn:hover{background:rgba(255,255,255,.14);transform:translateY(-1px);}
  .icon-btn:focus-visible{outline:3px solid rgba(106,77,240,.5);outline-offset:2px;}
  .is-scrolled .icon-btn{color:var(--c-text);border-color:var(--c-line);background:#fff;}
  .is-scrolled .icon-btn:hover{background:#F4F1FF;border-color:rgba(106,77,240,.35);}

  .menu-toggle{
    width:44px;height:44px;display:grid;place-content:center;gap:0;cursor:pointer;
    border-radius:12px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);
  }
  .menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-on-dark);margin:3px 0;transition:background-color .2s ease;}
  .menu-toggle:focus-visible{outline:3px solid rgba(106,77,240,.5);outline-offset:2px;}
  .is-scrolled .menu-toggle{border-color:var(--c-line);background:#fff;}
  .is-scrolled .menu-toggle span{background:var(--c-text);}

  /* 搜索面板 */
  .search-panel{
    position:absolute;left:0;right:0;top:100%;
    background:#fff;border-bottom:1px solid var(--c-line);box-shadow:var(--sh-2);
    padding:16px 0;display:none;
  }
  .search-panel.is-open{display:block;}
  .search-form{display:flex;gap:10px;align-items:center;}
  .search-input{
    flex:1;height:48px;border-radius:12px;border:1px solid var(--c-line);
    background:#fff;padding:0 16px;font-size:15px;color:var(--c-text);
  }
  .search-input::placeholder{color:var(--c-muted);}
  .search-input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(106,77,240,.22);}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
    transition:transform .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
    white-space:nowrap;
  }
  .btn:focus-visible{outline:3px solid rgba(106,77,240,.4);outline-offset:2px;}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;}
  .btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 24px -14px rgba(106,77,240,.9);}
  .btn-primary:hover{background:#7A5FF5;transform:translateY(-1px);}
  .btn-primary:active{background:var(--c-primary-deep);transform:translateY(1px);}
  .btn-accent{background:var(--c-accent);color:#2A1206;box-shadow:0 10px 24px -14px rgba(255,138,76,.9);}
  .btn-accent:hover{background:#FF9B67;transform:translateY(-1px);}
  .btn-accent:active{transform:translateY(1px);}
  .btn-ghost{background:transparent;border-color:rgba(255,255,255,.3);color:var(--c-on-dark);}
  .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.55);}
  .btn-outline{background:#fff;border-color:var(--c-line);color:var(--c-text);box-shadow:var(--sh-1);}
  .btn-outline:hover{background:#F4F1FF;border-color:rgba(106,77,240,.4);color:var(--c-primary);}

  /* ---------- 文章页头图 ---------- */
  .article-hero{
    position:relative;margin-top:-64px;padding:120px 0 56px;
    background:var(--c-ink);color:var(--c-on-dark);overflow:hidden;
    background-image:linear-gradient(100deg,rgba(12,10,31,.94) 0%,rgba(12,10,31,.86) 46%,rgba(23,19,56,.78) 100%),
      url('/assets/images/backpic/back-2.png');
    background-size:cover,cover;
    background-position:center,center;
  }
  .hero-orbit{
    position:absolute;right:-140px;bottom:-180px;width:430px;height:430px;
    border:1px solid rgba(255,255,255,.14);border-radius:50%;pointer-events:none;
  }
  .article-hero .hero-inner{position:relative;z-index:2;max-width:860px;}
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--c-on-dark-muted);}
  .crumb a{transition:color .2s ease;}
  .crumb a:hover{color:#fff;text-decoration:underline;text-decoration-color:rgba(255,255,255,.5);text-underline-offset:3px;}
  .crumb .sep{color:rgba(237,233,255,.35);}
  .crumb-current{color:var(--c-on-dark);max-width:100%;}
  .banner-title{
    margin:20px 0 12px;
    font-size:clamp(26px,3.2vw,38px);
    color:#fff;
  }
  .banner-desc{max-width:700px;font-size:15px;line-height:1.85;color:var(--c-on-dark-muted);margin:0;}
  .banner-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;}
  .chip{
    display:inline-flex;align-items:center;gap:6px;
    height:28px;padding:0 12px;border-radius:999px;
    font-size:13px;color:var(--c-on-dark);
    background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  }
  .chip-aqua{color:var(--c-aqua);border-color:rgba(79,216,196,.4);background:rgba(79,216,196,.08);}
  .chip-accent{color:var(--c-accent);border-color:rgba(255,138,76,.42);background:rgba(255,138,76,.08);}

  /* ---------- 正文 ---------- */
  .article-main{padding:56px 0 8px;}
  .article-inner{max-width:860px;margin:0 auto;}
  .article-head{max-width:760px;margin:0 auto 34px;}
  .badge{
    display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
    background:rgba(106,77,240,.1);color:var(--c-primary);
    font-size:13px;font-weight:600;letter-spacing:.02em;
  }
  .article-title{
    font-size:clamp(28px,3.6vw,42px);
    line-height:1.22;
    margin:18px 0 18px;
  }
  .article-meta{
    display:flex;flex-wrap:wrap;align-items:center;gap:10px;
    font-size:13px;color:var(--c-muted);
    font-family:Inter,"Helvetica Neue",Arial,sans-serif;font-variant-numeric:tabular-nums;
  }
  .article-meta .dot{color:#C9C2E4;}

  .article-body{
    max-width:760px;margin:0 auto;
    font-size:17px;line-height:1.85;color:var(--c-text);
  }
  .article-body p{margin:0 0 1.15em;}
  .article-body > p:first-of-type{
    border-left:3px solid var(--c-primary);
    padding-left:18px;
    font-size:18px;line-height:1.9;color:#2B2450;
  }
  .article-body h2{
    position:relative;padding-left:22px;
    font-size:clamp(22px,2.4vw,30px);
    margin:1.9em 0 .75em;
  }
  .article-body h2::before{
    content:"";position:absolute;left:0;top:.42em;width:12px;height:12px;
    border-radius:3px;background:var(--c-primary);
  }
  .article-body h3{font-size:21px;margin:1.6em 0 .6em;}
  .article-body ul,.article-body ol{margin:0 0 1.25em;padding-left:1.35em;}
  .article-body li{margin:.5em 0;padding-left:2px;}
  .article-body ul li::marker{color:var(--c-primary);}
  .article-body ol li::marker{color:var(--c-primary);font-weight:700;font-variant-numeric:tabular-nums;}
  .article-body blockquote{
    margin:1.6em 0;padding:18px 22px;
    background:#F3F0FF;border-left:3px solid var(--c-primary);
    border-radius:0 12px 12px 0;color:#332C5C;
  }
  .article-body blockquote p:last-child{margin-bottom:0;}
  .article-body img{border-radius:16px;margin:1.6em auto;height:auto;}
  .article-body figure{margin:1.8em 0;}
  .article-body figcaption{font-size:13px;color:var(--c-muted);text-align:center;margin-top:10px;}
  .article-body a{
    color:var(--c-primary);
    text-decoration:underline;text-decoration-color:rgba(106,77,240,.4);
    text-underline-offset:3px;transition:text-decoration-color .2s ease;
  }
  .article-body a:hover{text-decoration-color:var(--c-primary);}
  .article-body strong{font-weight:700;color:#241E45;}
  .article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:1.6em 0;display:block;overflow-x:auto;}
  .article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 12px;text-align:left;vertical-align:top;}
  .article-body th{background:#F5F3FF;font-weight:600;}
  .article-body code{
    background:#F3F0FF;padding:2px 6px;border-radius:6px;
    font-family:Inter,Consolas,monospace;font-size:14px;color:#3E2AA8;
  }
  .article-body hr{border:none;border-top:1px solid var(--c-line);margin:2em 0;}

  .article-empty{
    max-width:760px;margin:0 auto;padding:56px 24px;text-align:center;
    background:#fff;border:1px dashed #D9D2F2;border-radius:var(--r-card);
  }
  .article-empty .icon{
    width:56px;height:56px;margin:0 auto 16px;border-radius:50%;
    display:grid;place-items:center;background:rgba(106,77,240,.1);color:var(--c-primary);font-size:22px;
  }
  .article-empty h2{font-size:22px;margin-bottom:10px;}
  .article-empty p{color:var(--c-muted);font-size:15px;margin-bottom:22px;}

  .article-foot{
    max-width:760px;margin:44px auto 0;padding-top:24px;
    border-top:1px solid var(--c-line);
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  }
  .tag-row{display:flex;flex-wrap:wrap;gap:8px;}
  .tag{
    display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
    font-size:13px;color:var(--c-accent);border:1px solid rgba(255,138,76,.42);
    background:rgba(255,138,76,.06);
  }
  .back-link{
    display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--c-primary);
  }
  .back-link:hover{text-decoration:underline;text-underline-offset:4px;}

  /* ---------- 相关推荐 ---------- */
  .related{padding:64px 0 8px;}
  .section-head{margin-bottom:28px;}
  .eyebrow{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
    font-size:12px;letter-spacing:.08em;font-weight:600;
    color:var(--c-primary);background:rgba(106,77,240,.1);
  }
  .section-title{font-size:clamp(24px,2.8vw,32px);margin:14px 0 8px;}
  .section-sub{color:var(--c-muted);font-size:15px;max-width:640px;margin:0;}

  .related-grid{display:grid;grid-template-columns:1fr;gap:24px;}
  .rec-card{
    display:flex;flex-direction:column;overflow:hidden;
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--sh-1);
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  }
  .rec-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(106,77,240,.3);}
  .rec-thumb{aspect-ratio:16/10;overflow:hidden;background:#EFECFB;}
  .rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
  .rec-card:hover .rec-thumb img{transform:scale(1.03);}
  .rec-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .rec-title{font-family:"Noto Serif SC","Songti SC",serif;font-size:19px;font-weight:700;line-height:1.4;}
  .rec-desc{font-size:14px;line-height:1.7;color:var(--c-muted);margin:0;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .rec-more{margin-top:auto;font-size:14px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px;}
  .rec-card:hover .rec-more{gap:10px;}

  /* ---------- 深色 CTA 带 ---------- */
  .cta-band{
    position:relative;overflow:hidden;margin-top:72px;
    background:var(--c-ink);color:var(--c-on-dark);
    padding:64px 0;
  }
  .cta-inner{position:relative;z-index:2;display:grid;gap:28px;align-items:center;}
  .cta-eyebrow{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
    font-size:12px;letter-spacing:.08em;font-weight:600;
    color:var(--c-accent);border:1px solid rgba(255,138,76,.4);background:rgba(255,138,76,.08);
  }
  .cta-title{font-size:clamp(24px,2.9vw,34px);color:#fff;margin:14px 0 10px;}
  .cta-text{color:var(--c-on-dark-muted);font-size:15px;max-width:560px;margin:0;}
  .cta-form{display:flex;flex-wrap:wrap;gap:10px;}
  .cta-input{
    flex:1;min-width:210px;height:48px;border-radius:12px;
    border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);
    color:#fff;padding:0 16px;font-size:15px;
  }
  .cta-input::placeholder{color:rgba(167,159,199,.9);}
  .cta-input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(106,77,240,.35);}
  .form-note{font-size:13px;color:var(--c-on-dark-muted);margin:12px 0 0;}

  /* ---------- 页脚 ---------- */
  .site-footer{position:relative;overflow:hidden;background:var(--c-ink);color:var(--c-on-dark-muted);padding-top:64px;}
  .footer-orbit{
    position:absolute;left:-120px;top:-140px;width:340px;height:340px;
    border:1px solid rgba(255,255,255,.08);border-radius:50%;pointer-events:none;
  }
  .footer-grid{
    position:relative;z-index:2;
    display:grid;grid-template-columns:1fr;gap:36px;padding-bottom:48px;
  }
  .brand-footer .brand-name{color:#fff;white-space:normal;}
  .footer-desc{font-size:14px;line-height:1.85;max-width:330px;margin:14px 0 0;}
  .footer-col h3{
    font-family:"PingFang SC","Microsoft YaHei",sans-serif;
    font-size:14px;font-weight:600;letter-spacing:.06em;color:#fff;margin:0 0 14px;
  }
  .footer-col a{display:block;font-size:14px;padding:6px 0;transition:color .2s ease;}
  .footer-col a:hover{color:#fff;}
  .footer-col p{font-size:14px;margin:0 0 6px;line-height:1.7;}
  .footer-bottom{
    position:relative;z-index:2;
    border-top:1px solid rgba(255,255,255,.1);
    padding:20px 0 28px;
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:13px;
  }
  .footer-bottom p{margin:0;}

  /* ---------- 移动端抽屉 ---------- */
  .drawer-mask{
    position:fixed;inset:0;z-index:110;background:rgba(12,10,31,.6);
    opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible;}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;z-index:120;
    width:min(320px,86vw);background:var(--c-ink-2);color:var(--c-on-dark);
    padding:24px 22px;overflow-y:auto;
    transform:translateX(100%);transition:transform .28s ease;
  }
  .drawer.is-open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
  .drawer-close{
    width:40px;height:40px;border-radius:12px;cursor:pointer;
    border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);color:var(--c-on-dark);
    display:grid;place-items:center;
  }
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 12px;border-radius:12px;font-size:15px;
    border:1px solid rgba(255,255,255,.1);margin-bottom:10px;
    transition:background-color .2s ease,border-color .2s ease;
  }
  .drawer-link:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.2);}
  .drawer-link.is-active{color:#fff;border-color:rgba(255,138,76,.5);background:rgba(255,138,76,.08);}
  .drawer-cta{margin-top:18px;display:block;text-align:center;height:48px;line-height:48px;border-radius:12px;background:var(--c-primary);color:#fff;font-weight:600;}

  /* ---------- 响应式 ---------- */
  @media (min-width:640px){
    .related-grid{grid-template-columns:repeat(2,1fr);}
  }
  @media (min-width:768px){
    body .container{padding:0 32px;}
    .article-hero{padding:132px 0 64px;}
    .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px;}
    .cta-inner{grid-template-columns:1.35fr 1fr;}
  }
  @media (min-width:1024px){
    .nav-links{display:flex;}
    .menu-toggle{display:none;}
    .related-grid{grid-template-columns:repeat(3,1fr);}
    .related{padding:80px 0 8px;}
  }
  @media (max-width:520px){
    .brand-name{font-size:15px;}
    .btn-sm{padding:0 14px;}
    .article-hero{padding:104px 0 48px;}
    .article-meta{font-size:12px;}
  }

/* roulang page: category1 */
:root{
    --c-ink:#0C0A1F;
    --c-ink-2:#171338;
    --c-primary:#6A4DF0;
    --c-primary-deep:#3E2AA8;
    --c-accent:#FF8A4C;
    --c-aqua:#4FD8C4;
    --c-bg:#FAF9FF;
    --c-surface:#FFFFFF;
    --c-line:#E7E3F5;
    --c-text:#1B1636;
    --c-muted:#6B6488;
    --c-on-dark:#EDE9FF;
    --c-on-dark-muted:#A79FC7;
    --sh-1:0 1px 2px rgba(12,10,31,.04);
    --sh-2:0 10px 30px -12px rgba(12,10,31,.18);
    --sh-3:0 24px 60px -20px rgba(12,10,31,.28);
    --r-card:16px;
    --r-lg:24px;
    --r-btn:12px;
    --header-h:64px;
    --font-head:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
    --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
    --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--c-bg);
    color:var(--c-text);
    font-family:var(--font-body);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;color:var(--c-text);margin:0;}
  p{margin:0;}
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  input{font:inherit;}
  ul,ol{margin:0;padding:0;list-style:none;}
  :focus-visible{outline:3px solid rgba(106,77,240,.45);outline-offset:2px;border-radius:8px;}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
  .num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

  .container{
    width:100%;
    max-width:1240px;
    margin-left:auto;
    margin-right:auto;
    padding-left:20px;
    padding-right:20px;
  }
  @media (min-width:768px){
    .container{padding-left:32px;padding-right:32px;}
  }

  /* ---------- 星点纹理与星轨装饰 ---------- */
  .starfield{
    position:absolute;
    inset:0;
    pointer-events:none;
    opacity:.32;
    background-image:
      radial-gradient(1.4px 1.4px at 8% 18%, #FFFFFF 50%, transparent 51%),
      radial-gradient(1px 1px at 16% 62%, #EDE9FF 50%, transparent 51%),
      radial-gradient(1.2px 1.2px at 26% 34%, #FFFFFF 50%, transparent 51%),
      radial-gradient(1px 1px at 38% 76%, #A79FC7 50%, transparent 51%),
      radial-gradient(1.4px 1.4px at 47% 22%, #FFFFFF 50%, transparent 51%),
      radial-gradient(1px 1px at 58% 58%, #EDE9FF 50%, transparent 51%),
      radial-gradient(1.2px 1.2px at 67% 14%, #FFFFFF 50%, transparent 51%),
      radial-gradient(1px 1px at 74% 48%, #A79FC7 50%, transparent 51%),
      radial-gradient(1.4px 1.4px at 83% 72%, #FFFFFF 50%, transparent 51%),
      radial-gradient(1px 1px at 91% 30%, #EDE9FF 50%, transparent 51%),
      radial-gradient(1px 1px at 96% 84%, #FFFFFF 50%, transparent 51%);
    background-repeat:no-repeat;
    background-size:100% 100%;
  }
  .starfield-soft{opacity:.24;}

  .hero-orbit{
    position:absolute;
    right:-90px;
    top:34%;
    width:420px;
    height:420px;
    border-radius:50%;
    border:1px solid rgba(79,216,196,.26);
    border-left-color:transparent;
    border-bottom-color:transparent;
    transform:rotate(16deg);
    pointer-events:none;
  }
  .cta-orbit{
    position:absolute;
    right:-140px;
    bottom:-180px;
    width:460px;
    height:460px;
    border-radius:50%;
    border:1px solid rgba(255,138,76,.22);
    border-top-color:transparent;
    pointer-events:none;
  }

  /* ---------- 按钮 / 标签 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:48px;
    padding:0 22px;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    letter-spacing:.01em;
    transition:transform .2s ease, background-color .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease;
    white-space:nowrap;
  }
  .btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px;}
  .btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 24px -14px rgba(106,77,240,.9);}
  .btn-primary:hover{background:#7A5FF5;transform:translateY(-1px);}
  .btn-primary:active{background:var(--c-primary-deep);transform:translateY(1px);}
  .btn-ghost{background:transparent;color:var(--c-on-dark);border:1px solid rgba(237,233,255,.3);}
  .btn-ghost:hover{background:rgba(237,233,255,.1);border-color:rgba(237,233,255,.55);}
  .btn-accent{background:var(--c-accent);color:#25123A;box-shadow:0 12px 26px -14px rgba(255,138,76,.9);}
  .btn-accent:hover{background:#FF9A63;transform:translateY(-1px);}
  .btn-accent:active{transform:translateY(1px);}

  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:12px;
    font-weight:600;
    letter-spacing:.2em;
    color:var(--c-primary);
    text-transform:none;
  }
  .eyebrow::before{
    content:"";
    width:8px;
    height:8px;
    border-radius:2px;
    background:var(--c-accent);
    display:inline-block;
  }
  .eyebrow-dark{color:var(--c-on-dark-muted);}

  .chip{
    display:inline-flex;
    align-items:center;
    height:34px;
    padding:0 14px;
    border-radius:999px;
    background:rgba(106,77,240,.08);
    border:1px solid rgba(106,77,240,.18);
    color:var(--c-primary-deep);
    font-size:13.5px;
    font-weight:600;
  }
  .chip-aqua{
    background:rgba(79,216,196,.1);
    border-color:rgba(79,216,196,.3);
    color:#1F7A6C;
  }

  /* ---------- 导航 ---------- */
  .site-header{
    position:fixed;
    top:0;
    left:0;
    right:0;
    z-index:60;
    height:var(--header-h);
    display:flex;
    align-items:center;
    border-bottom:1px solid transparent;
    transition:height .25s ease, background-color .25s ease, border-color .25s ease, backdrop-filter .25s ease;
  }
  .site-header.is-scrolled{
    height:56px;
    background:rgba(12,10,31,.88);
    -webkit-backdrop-filter:blur(8px);
    backdrop-filter:blur(8px);
    border-bottom-color:rgba(237,233,255,.14);
  }
  .header-inner{
    display:flex;
    align-items:center;
    gap:18px;
    width:100%;
  }
  .brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
  .brand-mark{
    width:34px;
    height:34px;
    border-radius:10px;
    display:grid;
    place-items:center;
    background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
    color:#fff;
    font-family:var(--font-head);
    font-size:17px;
    font-weight:700;
    box-shadow:0 8px 18px -10px rgba(106,77,240,.85);
  }
  .brand-name{
    font-size:16px;
    font-weight:600;
    color:#fff;
    letter-spacing:.01em;
    white-space:nowrap;
  }
  .header-divider{width:1px;height:20px;background:rgba(237,233,255,.18);flex:0 0 auto;}
  .nav-links{display:flex;align-items:center;gap:22px;margin-right:auto;}
  .nav-link{
    position:relative;
    font-size:14.5px;
    color:var(--c-on-dark-muted);
    padding:8px 2px;
    transition:color .2s ease;
    white-space:nowrap;
  }
  .nav-link:hover{color:var(--c-on-dark);}
  .nav-link.is-active{color:#fff;font-weight:600;}
  .nav-link.is-active::after{
    content:"";
    position:absolute;
    left:0;
    right:0;
    bottom:2px;
    height:2px;
    border-radius:2px;
    background:var(--c-accent);
  }
  .header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
  .icon-btn{
    width:36px;
    height:36px;
    border-radius:10px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    color:var(--c-on-dark);
    background:rgba(237,233,255,.08);
    border:1px solid rgba(237,233,255,.12);
    transition:background-color .2s ease, border-color .2s ease, color .2s ease;
  }
  .icon-btn:hover{background:rgba(237,233,255,.16);border-color:rgba(237,233,255,.3);}
  .icon-btn svg{width:18px;height:18px;}
  .menu-toggle{display:none;}

  /* ---------- 移动端抽屉 ---------- */
  .drawer-mask{
    position:fixed;
    inset:0;
    background:rgba(12,10,31,.6);
    opacity:0;
    visibility:hidden;
    transition:opacity .25s ease, visibility .25s ease;
    z-index:70;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible;}
  .drawer{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    width:min(86vw,340px);
    background:var(--c-ink-2);
    border-left:1px solid rgba(237,233,255,.12);
    transform:translateX(102%);
    transition:transform .25s ease;
    z-index:80;
    padding:20px 20px 28px;
    display:flex;
    flex-direction:column;
    gap:6px;
  }
  .drawer.is-open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid rgba(237,233,255,.12);margin-bottom:12px;}
  .drawer-nav{display:flex;flex-direction:column;}
  .drawer-link{
    display:flex;
    align-items:center;
    min-height:44px;
    font-size:15px;
    color:var(--c-on-dark-muted);
    border-bottom:1px solid rgba(237,233,255,.08);
    transition:color .2s ease, padding-left .2s ease;
  }
  .drawer-link:hover{color:#fff;padding-left:4px;}
  .drawer-link.is-active{color:#fff;font-weight:600;}
  .drawer-cta{margin-top:18px;width:100%;}
  .drawer-note{margin-top:14px;font-size:12.5px;color:var(--c-on-dark-muted);}

  /* ---------- 分类页头 ---------- */
  .page-hero{
    position:relative;
    overflow:hidden;
    background:var(--c-ink);
    padding-top:112px;
    padding-bottom:44px;
    min-height:320px;
  }
  .page-hero-bg{
    position:absolute;
    inset:0;
    width:100%;
    height:100%;
    object-fit:cover;
    opacity:.4;
  }
  .page-hero-mask{
    position:absolute;
    inset:0;
    background:linear-gradient(104deg, rgba(12,10,31,.97) 0%, rgba(12,10,31,.86) 44%, rgba(23,19,56,.62) 100%);
  }
  .page-hero .container{position:relative;z-index:3;}
  .breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--c-on-dark-muted);
    margin-bottom:16px;
  }
  .breadcrumb a{color:var(--c-on-dark-muted);transition:color .2s ease;}
  .breadcrumb a:hover{color:#fff;}
  .page-hero h1{
    font-size:clamp(32px,4.2vw,50px);
    line-height:1.15;
    color:#fff;
    letter-spacing:.01em;
    margin-bottom:14px;
  }
  .page-hero-lead{
    max-width:780px;
    font-size:16px;
    line-height:1.85;
    color:var(--c-on-dark);
    opacity:.92;
  }

  /* ---------- 区块标题 ---------- */
  .section-head{max-width:740px;margin-bottom:36px;}
  .section-head h2{
    font-size:clamp(26px,3vw,34px);
    line-height:1.28;
    margin:12px 0 12px;
  }
  .section-head p{font-size:15.5px;color:var(--c-muted);}
  .section-head-dark h2{color:#fff;}
  .section-head-dark p{color:var(--c-on-dark-muted);}

  /* ---------- 速览条 ---------- */
  .quick-strip{
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-1);
    padding:20px 22px;
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:16px 22px;
  }
  .quick-strip .eyebrow{flex:0 0 auto;}
  .badge-row{display:flex;flex-wrap:wrap;gap:10px;flex:1 1 auto;}
  .quick-note{
    margin-top:14px;
    font-size:14px;
    color:var(--c-muted);
    max-width:840px;
  }

  /* ---------- 时间轴 / 步骤流 ---------- */
  .timeline-item{
    display:grid;
    grid-template-columns:56px minmax(0,1fr);
    gap:20px;
    padding-bottom:24px;
  }
  .timeline-item:last-child{padding-bottom:0;}
  .timeline-rail{position:relative;display:flex;justify-content:flex-start;padding-top:6px;}
  .timeline-rail::after{
    content:"";
    position:absolute;
    left:21px;
    top:56px;
    bottom:-24px;
    width:1px;
    background:linear-gradient(180deg, rgba(106,77,240,.42), rgba(106,77,240,.05));
  }
  .timeline-item:last-child .timeline-rail::after{display:none;}
  .timeline-dot{
    position:relative;
    z-index:1;
    width:44px;
    height:44px;
    border-radius:14px;
    display:grid;
    place-items:center;
    background:var(--c-surface);
    border:1px solid var(--c-line);
    box-shadow:var(--sh-1);
    color:var(--c-primary);
    font-family:var(--font-num);
    font-variant-numeric:tabular-nums;
    font-size:14px;
    font-weight:700;
  }
  .step-card{
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-1);
    padding:22px 24px;
    display:grid;
    grid-template-columns:minmax(0,1fr) 248px;
    gap:24px;
    align-items:start;
    transition:box-shadow .2s ease, border-color .2s ease, transform .2s ease;
  }
  .step-card:hover{
    box-shadow:var(--sh-2);
    border-color:rgba(106,77,240,.3);
    transform:translateY(-1px);
  }
  .step-card.no-figure{grid-template-columns:minmax(0,1fr);}
  .step-status{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:12.5px;
    color:var(--c-muted);
    margin-bottom:10px;
    letter-spacing:.02em;
  }
  .step-status .dot{
    width:7px;
    height:7px;
    border-radius:999px;
    background:var(--c-aqua);
    box-shadow:0 0 0 3px rgba(79,216,196,.16);
  }
  .step-card h3{font-size:21px;line-height:1.4;font-weight:600;margin-bottom:10px;}
  .step-card p{font-size:15px;line-height:1.8;color:var(--c-muted);}
  .step-list{margin-top:14px;display:grid;gap:8px;}
  .step-list li{
    position:relative;
    padding-left:20px;
    font-size:14.5px;
    line-height:1.7;
    color:var(--c-text);
  }
  .step-list li::before{
    content:"";
    position:absolute;
    left:2px;
    top:10px;
    width:8px;
    height:8px;
    border-radius:2px;
    background:rgba(106,77,240,.35);
  }
  .step-figure{
    border-radius:12px;
    overflow:hidden;
    border:1px solid var(--c-line);
    background:var(--c-bg);
    aspect-ratio:16 / 10;
  }
  .step-figure img{width:100%;height:100%;object-fit:cover;}

  /* ---------- 深色数据带 ---------- */
  .dark-band{
    position:relative;
    overflow:hidden;
    background:var(--c-ink);
    padding:64px 0;
  }
  @media (min-width:768px){
    .dark-band{padding:88px 0;}
  }
  .stat-grid{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:20px;
    position:relative;
    z-index:2;
  }
  .stat{
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.08);
    border-radius:var(--r-card);
    padding:22px 20px;
    transition:border-color .2s ease, background-color .2s ease;
  }
  .stat:hover{border-color:rgba(106,77,240,.5);background:rgba(255,255,255,.09);}
  .stat-value{
    font-family:var(--font-num);
    font-variant-numeric:tabular-nums;
    font-size:38px;
    font-weight:700;
    line-height:1.1;
    color:#fff;
    display:flex;
    align-items:baseline;
    gap:6px;
  }
  .stat-value span{font-size:14px;font-weight:600;color:var(--c-accent);}
  .stat p{margin-top:10px;font-size:14px;line-height:1.7;color:var(--c-on-dark-muted);}
  .dark-note{
    position:relative;
    z-index:2;
    margin-top:26px;
    font-size:14px;
    color:var(--c-on-dark-muted);
    border-left:2px solid rgba(106,77,240,.6);
    padding-left:14px;
    max-width:720px;
  }

  /* ---------- FAQ ---------- */
  .faq-list{max-width:780px;}
  .faq-item{
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-1);
    margin-bottom:12px;
    overflow:hidden;
    transition:border-color .2s ease, box-shadow .2s ease;
  }
  .faq-item.is-open{border-color:rgba(106,77,240,.32);box-shadow:var(--sh-2);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:18px 20px;
    text-align:left;
    font-size:16px;
    font-weight:600;
    color:var(--c-text);
    min-height:44px;
  }
  .faq-icon{
    position:relative;
    flex:0 0 auto;
    width:28px;
    height:28px;
    border-radius:999px;
    background:rgba(106,77,240,.12);
  }
  .faq-icon::before,
  .faq-icon::after{
    content:"";
    position:absolute;
    left:50%;
    top:50%;
    background:var(--c-primary);
    border-radius:2px;
    transition:transform .2s ease, opacity .2s ease;
  }
  .faq-icon::before{width:12px;height:2px;transform:translate(-50%,-50%);}
  .faq-icon::after{width:2px;height:12px;transform:translate(-50%,-50%);}
  .faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0;}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;}
  .faq-a-inner{padding:0 20px 20px;font-size:14.8px;line-height:1.8;color:var(--c-muted);}

  /* ---------- CTA 订阅带 ---------- */
  .cta-band{
    position:relative;
    overflow:hidden;
    background:var(--c-ink);
    padding:64px 0;
  }
  @media (min-width:768px){
    .cta-band{padding:88px 0;}
  }
  .cta-grid{
    position:relative;
    z-index:3;
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(0,420px);
    gap:40px;
    align-items:center;
  }
  .cta-band h2{font-size:clamp(26px,3vw,34px);line-height:1.28;color:#fff;margin:12px 0 14px;}
  .cta-band .cta-desc{font-size:15.5px;line-height:1.85;color:var(--c-on-dark-muted);max-width:560px;}
  .cta-links{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:22px;font-size:14.5px;}
  .cta-links a{
    color:var(--c-on-dark);
    border-bottom:1px solid rgba(106,77,240,.5);
    padding-bottom:2px;
    transition:color .2s ease, border-color .2s ease;
  }
  .cta-links a:hover{color:#fff;border-bottom-color:var(--c-accent);}
  .cta-links span{color:rgba(167,159,199,.6);}
  .cta-form{
    background:rgba(255,255,255,.06);
    border:1px solid rgba(255,255,255,.1);
    border-radius:var(--r-lg);
    padding:22px;
  }
  .field-row{display:flex;gap:10px;}
  .field-row input{
    flex:1 1 auto;
    min-width:0;
    height:48px;
    border-radius:12px;
    border:1px solid rgba(237,233,255,.2);
    background:rgba(12,10,31,.5);
    padding:0 14px;
    color:#fff;
    font-size:15px;
    transition:border-color .2s ease, box-shadow .2s ease;
  }
  .field-row input::placeholder{color:rgba(167,159,199,.85);}
  .field-row input:focus{
    outline:none;
    border-color:var(--c-primary);
    box-shadow:0 0 0 3px rgba(106,77,240,.35);
  }
  .form-feedback{margin-top:12px;font-size:13.5px;min-height:20px;color:var(--c-on-dark-muted);}
  .form-feedback.is-ok{color:var(--c-aqua);}
  .form-feedback.is-error{color:var(--c-accent);}
  .cta-form-note{margin-top:8px;font-size:12.5px;color:rgba(167,159,199,.75);}

  /* ---------- 页脚 ---------- */
  .site-footer{
    position:relative;
    overflow:hidden;
    background:var(--c-ink);
    color:var(--c-on-dark);
    padding-top:56px;
  }
  .footer-grid{
    position:relative;
    z-index:3;
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:32px;
    padding-bottom:40px;
  }
  .footer-desc{
    margin-top:14px;
    font-size:14px;
    line-height:1.8;
    color:var(--c-on-dark-muted);
    max-width:320px;
  }
  .footer-col h3{
    font-size:14px;
    font-weight:600;
    color:var(--c-on-dark);
    margin-bottom:14px;
    letter-spacing:.04em;
  }
  .footer-col a{
    display:block;
    font-size:14px;
    color:var(--c-on-dark-muted);
    padding:5px 0;
    transition:color .2s ease, transform .2s ease;
  }
  .footer-col a:hover{color:#fff;transform:translateX(2px);}
  .footer-col p{font-size:14px;color:var(--c-on-dark-muted);margin-bottom:6px;}
  .footer-bottom{
    position:relative;
    z-index:3;
    display:flex;
    flex-wrap:wrap;
    gap:10px 24px;
    justify-content:space-between;
    align-items:center;
    border-top:1px solid rgba(237,233,255,.12);
    padding-top:18px;
    padding-bottom:22px;
  }
  .footer-bottom p{font-size:13px;color:var(--c-on-dark-muted);}
  .footer-orbit{
    position:absolute;
    left:-140px;
    bottom:-190px;
    width:420px;
    height:420px;
    border-radius:50%;
    border:1px solid rgba(106,77,240,.22);
    border-right-color:transparent;
    pointer-events:none;
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .nav-links,
    .header-divider{display:none;}
    .menu-toggle{display:inline-flex;}
    .header-cta{display:none;}
    .cta-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
    .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-grid{grid-template-columns:1fr 1fr;}
  }
  @media (max-width:900px){
    .step-card{grid-template-columns:minmax(0,1fr);}
    .step-figure{max-width:520px;}
  }
  @media (max-width:767px){
    .page-hero{
      padding-top:96px;
      padding-bottom:36px;
      min-height:288px;
    }
    .step-card{padding:18px 18px 20px;}
    .step-card h3{font-size:19px;}
    .timeline-item{grid-template-columns:44px minmax(0,1fr);gap:14px;padding-bottom:20px;}
    .timeline-dot{width:38px;height:38px;border-radius:12px;font-size:13px;}
    .timeline-rail::after{left:18px;top:48px;}
    .quick-strip{padding:18px;}
    .field-row{flex-direction:column;}
    .field-row .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr;gap:26px;}
    .section-head{margin-bottom:26px;}
  }
  @media (max-width:560px){
    .stat-grid{grid-template-columns:minmax(0,1fr);}
    .brand-name{font-size:15px;}
    .page-hero-lead{font-size:15px;}
  }
  @media (prefers-reduced-motion: reduce){
    *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
    html{scroll-behavior:auto;}
  }

/* roulang page: category2 */
:root{
  --c-ink:#0C0A1F;
  --c-ink-2:#171338;
  --c-primary:#6A4DF0;
  --c-primary-deep:#3E2AA8;
  --c-accent:#FF8A4C;
  --c-aqua:#4FD8C4;
  --c-bg:#FAF9FF;
  --c-surface:#FFFFFF;
  --c-line:#E7E3F5;
  --c-text:#1B1636;
  --c-muted:#6B6488;
  --c-on-dark:#EDE9FF;
  --c-on-dark-muted:#A79FC7;
  --r-card:16px;
  --r-lg:24px;
  --r-btn:12px;
  --sh-1:0 1px 2px rgba(12,10,31,.04);
  --sh-2:0 10px 30px -12px rgba(12,10,31,.18);
  --sh-3:0 24px 60px -20px rgba(12,10,31,.28);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","Helvetica Neue",Helvetica,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4{font-family:var(--font-serif);margin:0;color:var(--c-text);font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(106,77,240,.4);outline-offset:2px;border-radius:8px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 32px;}}
.section{padding:56px 0;}
@media (min-width:768px){.section{padding:88px 0;}}
.section-tight{padding:36px 0 0;}

/* ---------- 星点与星轨装饰 ---------- */
.starfield{
  position:absolute;inset:0;pointer-events:none;opacity:.33;z-index:1;
  background-image:
    radial-gradient(1.6px 1.6px at 8% 18%, rgba(255,255,255,.85), transparent 60%),
    radial-gradient(1.2px 1.2px at 22% 62%, rgba(255,255,255,.7), transparent 60%),
    radial-gradient(1.8px 1.8px at 38% 28%, rgba(255,255,255,.8), transparent 60%),
    radial-gradient(1.2px 1.2px at 55% 78%, rgba(255,255,255,.6), transparent 60%),
    radial-gradient(1.6px 1.6px at 71% 22%, rgba(255,255,255,.75), transparent 60%),
    radial-gradient(1.3px 1.3px at 86% 58%, rgba(255,255,255,.65), transparent 60%),
    radial-gradient(1.1px 1.1px at 94% 86%, rgba(255,255,255,.55), transparent 60%);
  background-repeat:no-repeat;
}
.starfield-soft{opacity:.2;}
.orbit-arc{
  position:absolute;width:420px;height:420px;border-radius:50%;
  border:1px solid rgba(237,233,255,.16);pointer-events:none;z-index:1;
}
.orbit-arc::after{
  content:"";position:absolute;top:-3px;left:50%;width:6px;height:6px;border-radius:50%;
  background:var(--c-accent);box-shadow:0 0 0 4px rgba(255,138,76,.16);
}
.footer-orbit{
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(237,233,255,.28),transparent);
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:var(--c-ink);
  border-bottom:1px solid transparent;
  transition:background .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{
  background:rgba(12,10,31,.9);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom-color:rgba(237,233,255,.14);
  box-shadow:0 12px 30px -22px rgba(12,10,31,.9);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;height:64px;transition:height .2s ease;}
.site-header.is-scrolled .nav-bar{height:56px;}
.nav-left{display:flex;align-items:center;gap:26px;min-width:0;}
.brand{display:inline-flex;align-items:center;gap:10px;min-width:0;}
.brand-mark{
  flex:none;width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
  color:#fff;font-family:var(--font-serif);font-weight:700;font-size:16px;
  border:1px solid rgba(237,233,255,.24);transition:box-shadow .2s ease;
}
.brand:hover .brand-mark{box-shadow:0 0 0 4px rgba(106,77,240,.22);}
.brand-name{
  font-family:var(--font-serif);font-weight:700;font-size:17px;color:var(--c-on-dark);
  white-space:nowrap;letter-spacing:.02em;
}
.nav-divider{width:1px;height:22px;background:rgba(237,233,255,.18);display:none;}
@media (min-width:1024px){.nav-divider{display:block;}}
.nav-links{display:none;align-items:center;gap:6px;}
@media (min-width:1024px){.nav-links{display:flex;}}
.nav-link{
  padding:8px 14px;border-radius:999px;font-size:14.5px;color:var(--c-on-dark-muted);
  transition:color .18s ease,background .18s ease;white-space:nowrap;
}
.nav-link:hover{color:var(--c-on-dark);background:rgba(237,233,255,.08);}
.nav-link.is-active{color:#fff;background:rgba(106,77,240,.34);}
.nav-right{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;cursor:pointer;
  background:rgba(237,233,255,.06);border:1px solid rgba(237,233,255,.16);color:var(--c-on-dark);
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.icon-btn:hover{background:rgba(237,233,255,.14);border-color:rgba(237,233,255,.32);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);cursor:pointer;
  font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;
}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:11px;}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:#7A5DF6;transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(106,77,240,.75);}
.btn-primary:active{transform:translateY(1px);background:var(--c-primary-deep);}
.btn-accent{background:var(--c-accent);color:#2A1608;}
.btn-accent:hover{background:#FF9C68;transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(255,138,76,.75);}
.btn-accent:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:rgba(237,233,255,.4);color:var(--c-on-dark);}
.btn-ghost:hover{background:rgba(237,233,255,.12);border-color:var(--c-on-dark);}
.btn-outline{background:transparent;border-color:var(--c-line);color:var(--c-text);}
.btn-outline:hover{background:#F1EDFF;border-color:rgba(106,77,240,.5);color:var(--c-primary);}
.nav-toggle{display:grid;}
@media (min-width:1024px){.nav-toggle{display:none;}}
.nav-cta{display:none;}
@media (min-width:640px){.nav-cta{display:inline-flex;}}

/* ---------- 移动抽屉 ---------- */
.drawer{position:fixed;inset:0;z-index:90;pointer-events:none;}
.drawer[data-open="true"]{pointer-events:auto;}
.drawer-mask{position:absolute;inset:0;background:rgba(12,10,31,.6);opacity:0;transition:opacity .22s ease;}
.drawer[data-open="true"] .drawer-mask{opacity:1;}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:min(84vw,340px);
  background:var(--c-ink);border-left:1px solid rgba(237,233,255,.12);
  transform:translateX(100%);transition:transform .22s ease;
  padding:20px;display:flex;flex-direction:column;gap:6px;overflow:auto;
}
.drawer[data-open="true"] .drawer-panel{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 14px;border-radius:12px;font-size:15.5px;color:var(--c-on-dark-muted);
  border:1px solid transparent;transition:.18s ease;
}
.drawer-link:hover{color:var(--c-on-dark);background:rgba(237,233,255,.08);}
.drawer-link.is-active{color:#fff;background:rgba(106,77,240,.3);border-color:rgba(106,77,240,.5);}

/* ---------- 页头 Hero ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--c-ink);}
.page-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(12,10,31,.9) 0%,rgba(12,10,31,.74) 42%,rgba(23,19,56,.94) 100%);
}
.page-hero-inner{position:relative;z-index:2;padding:64px 0 52px;min-height:340px;display:flex;flex-direction:column;justify-content:flex-end;}
@media (min-width:768px){.page-hero-inner{min-height:360px;padding:76px 0 60px;}}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--c-on-dark-muted);margin-bottom:18px;}
.breadcrumb a{color:var(--c-on-dark-muted);transition:color .18s ease;}
.breadcrumb a:hover{color:var(--c-on-dark);}
.breadcrumb .sep{opacity:.55;}
.breadcrumb .current{color:var(--c-on-dark);}
.page-hero h1{
  color:#fff;font-size:clamp(34px,4.6vw,54px);line-height:1.15;letter-spacing:.01em;
  margin-bottom:16px;max-width:18em;
}
.page-hero p.lede{color:var(--c-on-dark-muted);font-size:16.5px;line-height:1.85;max-width:760px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 13px;border-radius:999px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
  background:rgba(237,233,255,.08);border:1px solid rgba(237,233,255,.22);color:var(--c-on-dark);
}
.tag-accent{background:rgba(255,138,76,.14);border-color:rgba(255,138,76,.5);color:#FFC39E;}
.tag-aqua{background:rgba(79,216,196,.12);border-color:rgba(79,216,196,.45);color:#A6EFE4;}

/* ---------- 要点速览 ---------- */
.quick-strip{
  position:relative;z-index:5;margin-top:-32px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-2);padding:20px 24px;
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;
}
.quick-strip .strip-label{
  font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--c-primary);
  display:inline-flex;align-items:center;gap:8px;
}
.quick-strip .strip-label::before{content:"";width:18px;height:1px;background:var(--c-accent);}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 14px;border-radius:999px;
  background:#F4F1FF;border:1px solid rgba(106,77,240,.22);color:var(--c-primary);
  font-size:13.5px;font-weight:600;
}
.chip::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent);}
.quick-note{font-size:13.5px;color:var(--c-muted);margin-left:auto;}

/* ---------- 区块标题 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;
  letter-spacing:.16em;color:var(--c-primary);margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--c-accent);}
.eyebrow-dark{color:var(--c-accent);}
.section-title{font-size:clamp(26px,3vw,34px);line-height:1.25;letter-spacing:.01em;margin-bottom:14px;}
.section-sub{color:var(--c-muted);font-size:16px;max-width:760px;}
.section-head{margin-bottom:40px;}
.section-head-row{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;}

/* ---------- 步骤流 ---------- */
.step-flow{position:relative;}
@media (min-width:1024px){
  .step-flow::before{
    content:"";position:absolute;left:27px;top:16px;bottom:56px;width:1px;
    background:linear-gradient(180deg,rgba(106,77,240,.45),rgba(231,227,245,.95));
  }
}
.step{position:relative;padding-bottom:34px;}
@media (min-width:768px){
  .step{display:grid;grid-template-columns:54px minmax(0,1fr);gap:24px;align-items:start;padding-bottom:44px;}
}
@media (min-width:1024px){
  .step{grid-template-columns:54px minmax(0,1fr) 300px;gap:30px;}
}
.step-num{
  width:54px;height:54px;border-radius:50%;background:var(--c-surface);
  border:1px solid var(--c-line);box-shadow:var(--sh-1);
  display:grid;place-items:center;font-family:var(--font-num);font-weight:700;font-size:15px;
  color:var(--c-primary);letter-spacing:.04em;margin-bottom:16px;position:relative;z-index:2;
}
@media (min-width:768px){.step-num{margin-bottom:0;}}
.step-body{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:22px 24px;
  transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
}
.step-body:hover{box-shadow:var(--sh-2);border-color:rgba(106,77,240,.3);transform:translateY(-2px);}
.step-body h3{font-size:21px;line-height:1.4;margin-bottom:10px;}
.step-body p{font-size:15.5px;line-height:1.85;color:var(--c-muted);}
.step-points{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px;}
.step-points span{
  font-size:12.5px;color:var(--c-primary);background:#F4F1FF;border-radius:999px;padding:4px 12px;
}
.step-media{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-1);aspect-ratio:16/10;background:#EFECFB;margin-top:16px;
}
@media (min-width:1024px){.step-media{margin-top:0;}}
.step-media img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease;}
.step-media:hover img{transform:scale(1.03);}

/* ---------- 适用场景卡 ---------- */
.scene-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media (min-width:768px){.scene-grid{grid-template-columns:1.15fr 1fr 1fr;}}
.scene-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);transition:box-shadow .2s ease,border-color .2s ease;
}
.scene-card:hover{box-shadow:var(--sh-2);border-color:rgba(106,77,240,.3);}
.scene-card h3{font-size:19px;margin-bottom:10px;}
.scene-card p{font-size:14.5px;line-height:1.75;color:var(--c-muted);}
.scene-card .scene-index{
  font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--c-aqua);
  letter-spacing:.14em;display:block;margin-bottom:12px;
}
.scene-card-dark{background:var(--c-ink-2);border-color:rgba(237,233,255,.14);}
.scene-card-dark h3{color:var(--c-on-dark);}
.scene-card-dark p{color:var(--c-on-dark-muted);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:760px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.is-open{border-color:rgba(106,77,240,.35);box-shadow:var(--sh-2);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16.5px;font-weight:600;color:var(--c-text);line-height:1.6;
}
.faq-icon{
  flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;
  background:rgba(106,77,240,.12);color:var(--c-primary);font-size:17px;line-height:1;
  transition:background .2s ease,color .2s ease;
}
.faq-item.is-open .faq-icon{background:var(--c-primary);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;}
.faq-a-inner{padding:0 20px 20px;font-size:15.5px;line-height:1.85;color:var(--c-muted);}

/* ---------- CTA 星河带 ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background:var(--c-ink);padding:44px 24px;
}
@media (min-width:768px){.cta-band{padding:56px 48px;}}
.cta-grid{position:relative;z-index:2;display:grid;gap:32px;grid-template-columns:1fr;}
@media (min-width:1024px){.cta-grid{grid-template-columns:1fr 1fr;align-items:center;gap:48px;}}
.cta-band h2{color:#fff;font-size:clamp(26px,3vw,34px);line-height:1.25;margin-bottom:14px;}
.cta-band p{color:var(--c-on-dark-muted);font-size:15.5px;line-height:1.85;}
.cta-form{display:flex;flex-wrap:wrap;gap:12px;}
.cta-form input{
  flex:1 1 240px;height:48px;border-radius:var(--r-btn);padding:0 16px;
  background:rgba(237,233,255,.07);border:1px solid rgba(237,233,255,.24);
  color:var(--c-on-dark);font-size:15px;outline:none;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.cta-form input::placeholder{color:rgba(167,159,199,.85);}
.cta-form input:focus{border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(106,77,240,.28);background:rgba(237,233,255,.1);}
.form-msg{min-height:22px;font-size:13.5px;color:var(--c-aqua);margin-top:12px;}
.cta-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;background:var(--c-ink);
  color:var(--c-on-dark-muted);margin-top:72px;padding:56px 0 24px;
}
.footer-grid{position:relative;z-index:2;display:grid;gap:34px;grid-template-columns:1fr;}
@media (min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px;}}
.footer-desc{font-size:14.5px;line-height:1.85;color:var(--c-on-dark-muted);margin-top:16px;max-width:32em;}
.footer-col h3{color:var(--c-on-dark);font-size:15px;margin-bottom:14px;letter-spacing:.02em;}
.footer-col a{display:block;padding:6px 0;font-size:14.5px;color:var(--c-on-dark-muted);transition:color .18s ease,transform .18s ease;}
.footer-col a:hover{color:var(--c-on-dark);transform:translateX(2px);}
.footer-col p{font-size:14.5px;padding:4px 0;}
.footer-bottom{
  position:relative;z-index:2;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  border-top:1px solid rgba(237,233,255,.12);margin-top:38px;padding-top:18px;font-size:13px;
}
.brand-footer .brand-name{font-size:16px;}

@media (max-width:520px){
  .page-hero h1{font-size:32px;}
  .step-num{width:46px;height:46px;font-size:14px;}
  .quick-strip{padding:18px;}
  .quick-note{margin-left:0;}
  .cta-band{padding:36px 20px;}
}