/* roulang page: index */
:root{
      --ink:#171419;
      --ink-soft:#242027;
      --panel:#2c252d;
      --panel-light:#382f38;
      --paper:#f5f0e9;
      --paper-soft:#ebe3da;
      --text:#fffaf5;
      --muted:#bcb0b9;
      --line:rgba(255,250,245,.14);
      --coral:#ef725f;
      --coral-dark:#c94e4d;
      --plum:#9d527a;
      --gold:#e9bd79;
      --green:#8dcc9f;
      --danger:#e17878;
      --radius:18px;
      --shadow:0 18px 50px rgba(0,0,0,.22);
      --ease:all .25s cubic-bezier(.2,.7,.2,1);
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--ink);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{display:block;max-width:100%;height:auto}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    :focus-visible{outline:3px solid var(--gold);outline-offset:3px}
    .container{max-width:1240px}
    .site-header{position:sticky;top:0;z-index:1000;background:rgba(23,20,25,.97);border-bottom:1px solid var(--line);transition:var(--ease)}
    .site-header.scrolled{box-shadow:0 8px 28px rgba(0,0,0,.25);background:rgba(23,20,25,.99)}
    .toolbar{min-height:74px;display:flex;align-items:center;gap:28px}
    .brand{display:flex;align-items:center;gap:11px;min-width:280px;font-weight:800;letter-spacing:-.04em}
    .brand-mark{width:33px;height:33px;display:grid;place-items:center;background:var(--coral);color:var(--ink);border-radius:10px 3px 10px 3px;font-size:16px}
    .brand-name{font-size:16px;white-space:nowrap}
    .nav-links{display:flex;align-items:center;gap:5px;flex:1}
    .nav-links a{position:relative;color:var(--muted);font-size:14px;padding:10px 13px;border-radius:9px}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(239,114,95,.1)}
    .nav-links a.active::after{content:"";height:2px;width:22px;position:absolute;left:13px;bottom:4px;background:var(--coral)}
    .header-tools{display:flex;align-items:center;gap:14px;white-space:nowrap}
    .status{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:12px}
    .status-dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 5px rgba(141,204,159,.1);animation:pulse 2.4s infinite}
    .tool-link{color:var(--muted);font-size:18px;padding:5px}
    .tool-link:hover{color:var(--gold)}
    .btn-brand{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--coral);background:var(--coral);color:#21191d;border-radius:10px;padding:11px 18px;font-weight:800;font-size:14px;transition:var(--ease)}
    .btn-brand:hover{background:#ff8b75;border-color:#ff8b75;color:#21191d;transform:translateY(-2px);box-shadow:0 8px 20px rgba(239,114,95,.2)}
    .btn-outline{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);color:var(--text);border-radius:10px;padding:10px 17px;font-weight:700;font-size:14px;background:transparent;transition:var(--ease)}
    .btn-outline:hover{border-color:var(--gold);color:var(--gold);background:rgba(233,189,121,.06)}
    .navbar-toggler{border:1px solid var(--line);color:var(--text);padding:8px 11px;border-radius:9px}
    .hero{position:relative;padding:92px 0 64px;overflow:hidden;background:var(--ink)}
    .hero::before{content:"";position:absolute;right:-130px;top:20px;width:520px;height:520px;border:1px solid rgba(239,114,95,.2);border-radius:50%;box-shadow:0 0 0 48px rgba(239,114,95,.025),0 0 0 96px rgba(239,114,95,.025)}
    .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;position:relative}
    .eyebrow,.section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
    h1{font-size:clamp(42px,5.2vw,76px);line-height:1.12;letter-spacing:-.075em;margin:17px 0 24px;font-weight:900;max-width:720px}
    h1 em{font-style:normal;color:var(--coral)}
    .hero-copy{color:var(--muted);font-size:17px;max-width:650px;line-height:1.9}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:31px}
    .hero-note{display:flex;gap:20px;margin-top:34px;color:var(--muted);font-size:12px}
    .hero-note strong{display:block;color:var(--text);font-size:20px;line-height:1.2;margin-bottom:4px}
    .status-board{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow);transform:rotate(1deg)}
    .board-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:19px;margin-bottom:20px}
    .board-title{font-weight:800}.board-code{color:var(--gold);font:12px monospace}
    .board-main{min-height:160px;padding:20px;background:linear-gradient(135deg,#533342,#312732 52%,#201c24);border-radius:12px;display:flex;flex-direction:column;justify-content:end;position:relative;overflow:hidden}
    .board-main::after{content:"18+";position:absolute;right:20px;top:18px;border:1px solid rgba(255,255,255,.35);padding:4px 8px;border-radius:5px;color:#fff;font:700 12px monospace}
    .board-main strong{font-size:28px;letter-spacing:-.05em}
    .board-main span{color:#ddcbd0;font-size:13px}
    .board-row{display:grid;grid-template-columns:1fr auto;gap:12px;padding:15px 0;border-bottom:1px solid var(--line);font-size:13px}
    .board-row:last-child{border:0;padding-bottom:0}.board-row span{color:var(--muted)}.board-row b{color:var(--green);font-weight:700}
    .section{padding:92px 0}.section-paper{background:var(--paper);color:var(--ink)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:35px}
    h2{font-size:clamp(28px,3.4vw,45px);line-height:1.18;letter-spacing:-.055em;margin:9px 0 0;font-weight:900}
    .section-intro{color:var(--muted);max-width:560px;margin:0}
    .section-paper .section-intro{color:#6d6268}
    .metrics{display:grid;grid-template-columns:1.25fr 1fr 1fr 1.15fr;gap:1px;background:var(--line);border:1px solid var(--line)}
    .metric{background:var(--panel);padding:25px 24px;min-height:140px}
    .metric:nth-child(1){background:var(--coral);color:var(--ink)}.metric:nth-child(1) .metric-note{color:#4d3031}
    .metric-value{font-size:34px;line-height:1;font-weight:900;letter-spacing:-.06em;margin:14px 0 8px}
    .metric-label{font-size:12px;font-weight:800;letter-spacing:.06em}.metric-note{font-size:12px;color:var(--muted)}
    .matrix{display:grid;grid-template-columns:1.15fr .85fr 1fr;grid-template-rows:auto auto;gap:14px}
    .matrix-card{border:1px solid #d8cec4;background:#fbf7f1;padding:27px;border-radius:var(--radius);min-height:190px;transition:var(--ease);position:relative}
    .matrix-card:hover{transform:translateY(-5px);box-shadow:0 15px 28px rgba(45,30,35,.1);border-color:var(--coral)}
    .matrix-card.featured{grid-row:span 2;background:var(--ink);color:var(--text);min-height:394px}
    .matrix-card.wide{grid-column:span 2;min-height:175px}
    .matrix-no{font:700 12px monospace;color:var(--coral)}.matrix-card h3{font-size:22px;margin:27px 0 9px;letter-spacing:-.04em}.matrix-card p{font-size:14px;color:#766a6c;margin:0;max-width:360px}.featured p{color:var(--muted)}
    .badge{display:inline-flex;align-items:center;border:1px solid currentColor;border-radius:99px;padding:3px 8px;font-size:11px;font-weight:700;color:var(--plum)}
    .featured .badge{color:var(--gold)}.matrix-link{position:absolute;bottom:23px;right:25px;color:var(--coral);font-size:13px;font-weight:800}
    .compare-wrap{display:grid;grid-template-columns:.75fr 1.25fr;gap:48px;align-items:center}.compare-copy p{color:var(--muted);max-width:430px}
    .compare-panel{border:1px solid var(--line);background:var(--panel);border-radius:var(--radius);padding:28px}
    .compare-item{display:grid;grid-template-columns:125px 1fr 68px;gap:16px;align-items:center;margin:19px 0;font-size:13px}.compare-item>span{color:var(--muted)}
    .bar{height:8px;background:#473b45;border-radius:10px;overflow:hidden}.bar i{display:block;height:100%;background:var(--coral);border-radius:inherit}.compare-item b{font-size:12px;color:var(--text);text-align:right}
    .content-strip{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.feature-content,.content-list{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:27px}
    .abstract-cover{height:205px;border-radius:12px;background:linear-gradient(130deg,#8e4e6a,#ef725f 48%,#e9bd79);position:relative;overflow:hidden;margin-bottom:22px}
    .abstract-cover::before{content:"浏览提示";position:absolute;right:20px;bottom:17px;color:rgba(255,255,255,.8);font-weight:800;font-size:23px;transform:rotate(-8deg)}
    .content-meta{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:12px}.content-title{font-size:24px;font-weight:800;margin:12px 0}
    .content-list h3{font-size:17px;margin:0 0 16px}.content-row{display:flex;gap:15px;align-items:center;padding:16px 0;border-top:1px solid var(--line)}.content-index{color:var(--coral);font:700 15px monospace}.content-row p{margin:0;flex:1;font-size:14px}.content-row small{color:var(--muted);display:block;margin-top:3px}.content-row a{color:var(--gold);font-size:12px;font-weight:800}
    .faq-grid{display:grid;grid-template-columns:.65fr 1.35fr;gap:62px}.faq-grid h2{color:var(--ink)}.faq-grid .section-intro{margin-top:18px}
    .accordion-item{background:transparent;border:0;border-bottom:1px solid #d4c9bf;border-radius:0!important}.accordion-button{background:transparent!important;color:var(--ink)!important;box-shadow:none!important;font-weight:800;padding:20px 4px}.accordion-button::after{filter:brightness(.3)}.accordion-body{padding:0 30px 20px 4px;color:#665c60;font-size:14px}
    .safety{margin-top:28px;border-left:3px solid var(--coral);padding:15px 18px;background:#eee6df;color:#665c60;font-size:13px}
    .form-section{padding:76px 0;background:#31262d}.form-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:start}.form-wrap h2{max-width:400px}.form-wrap p{color:var(--muted)}.form-card{background:#f8f2eb;color:var(--ink);padding:30px;border-radius:var(--radius)}
    label{display:block;font-size:13px;font-weight:800;margin-bottom:7px}.form-control,.form-select{border:1px solid #d5c8be;background:#fffaf6;border-radius:9px;padding:12px 13px;color:var(--ink)}.form-control:focus,.form-select:focus{border-color:var(--coral);box-shadow:0 0 0 3px rgba(239,114,95,.15)}.form-hint{font-size:12px;color:#817478;margin-top:7px}.form-status{display:none;color:#39724e;font-size:13px;margin-top:12px}
    footer{padding:45px 0 25px;background:#161318;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}.footer-brand{font-size:18px;font-weight:900}.footer-copy{color:var(--muted);font-size:13px;max-width:300px;margin-top:12px}.footer-col h3{font-size:13px;color:var(--gold);margin:0 0 14px}.footer-col a{display:block;color:var(--muted);font-size:13px;margin:8px 0}.footer-col a:hover{color:var(--coral)}.copyright{border-top:1px solid var(--line);margin-top:35px;padding-top:18px;color:#827681;font-size:12px;display:flex;justify-content:space-between;gap:15px}
    .age-modal{background:rgba(15,12,16,.82)}.age-modal .modal-content{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:var(--radius)}.age-modal .modal-header{border-color:var(--line)}.age-modal .modal-footer{border-color:var(--line)}.age-modal .btn-close{filter:invert(1)}
    @keyframes pulse{50%{box-shadow:0 0 0 8px rgba(141,204,159,0)}}
    @media (max-width:1199px){.brand{min-width:230px}.toolbar{gap:15px}.hero-grid{gap:35px}}
    @media (max-width:991px){.toolbar{flex-wrap:wrap;padding:12px 0}.brand{flex:1}.nav-links{order:3;display:none;flex-direction:column;align-items:stretch;width:100%;padding:12px 0}.nav-links.show{display:flex}.nav-links a{padding:12px}.header-tools{margin-left:auto}.hero{padding-top:65px}.hero-grid,.compare-wrap,.faq-grid,.form-wrap,.content-strip{grid-template-columns:1fr}.status-board{max-width:620px}.metrics{grid-template-columns:1fr 1fr}.matrix-card.featured{grid-row:auto;min-height:260px}.matrix-card.wide{grid-column:auto}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}}
    @media (max-width:767px){.hero{padding:55px 0 45px}.hero-copy{font-size:15px}.section,.form-section{padding:62px 0}.section-head{display:block}.section-intro{margin-top:15px}.metrics{overflow:hidden}.metric{min-height:125px;padding:19px 16px}.metric-value{font-size:27px}.matrix{display:flex;flex-direction:column}.matrix-card,.matrix-card.featured,.matrix-card.wide{min-height:180px}.compare-wrap{gap:28px}.compare-item{grid-template-columns:92px 1fr 45px;gap:9px}.form-wrap{gap:30px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:7px}}
    @media (max-width:575px){h1{font-size:41px}.brand-name{font-size:14px}.header-tools .status,.header-tools .tool-link{display:none}.hero-note{gap:14px}.hero-note strong{font-size:18px}.metrics{grid-template-columns:1fr 1fr}.metric:nth-child(1){grid-column:span 2}.status-board{padding:18px}.board-main{min-height:140px}.footer-grid{grid-template-columns:1fr}.footer-col{border-top:1px solid var(--line);padding-top:17px}}
    @media (prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

/* roulang page: category2 */
:root{
      --ink:#171419;
      --ink-soft:#242027;
      --panel:#2c252d;
      --panel-light:#382f38;
      --paper:#f5f0e9;
      --paper-soft:#ebe3da;
      --text:#fffaf5;
      --muted:#bcb0b9;
      --line:rgba(255,250,245,.14);
      --coral:#ef725f;
      --coral-dark:#c94e4d;
      --plum:#9d527a;
      --gold:#e9bd79;
      --green:#8dcc9f;
      --danger:#e17878;
      --radius:18px;
      --shadow:0 18px 50px rgba(0,0,0,.22);
      --ease:all .25s cubic-bezier(.2,.7,.2,1);
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--ink);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{display:block;max-width:100%;height:auto}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    .container{max-width:1240px}
    .site-header{position:sticky;top:0;z-index:1000;background:rgba(23,20,25,.97);border-bottom:1px solid var(--line);transition:var(--ease)}
    .site-header.scrolled{box-shadow:0 8px 28px rgba(0,0,0,.25);background:rgba(23,20,25,.99)}
    .toolbar{min-height:72px;display:flex;align-items:center;gap:28px}
    .brand{display:flex;align-items:center;gap:11px;min-width:280px;font-weight:800;letter-spacing:-.04em}
    .brand-mark{width:33px;height:33px;display:grid;place-items:center;background:var(--coral);color:var(--ink);border-radius:10px 3px 10px 3px;font-size:16px}
    .brand-name{font-size:16px;white-space:nowrap}
    .nav-links{display:flex;align-items:center;gap:5px;flex:1}
    .nav-links a{position:relative;color:var(--muted);font-size:14px;padding:10px 13px;border-radius:9px}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(239,114,95,.1)}
    .nav-links a.active::after{content:"";height:2px;width:22px;position:absolute;left:13px;bottom:4px;background:var(--coral)}
    .header-tools{display:flex;align-items:center;gap:14px;white-space:nowrap}
    .status{color:var(--muted);font-size:12px}
    .status-dot{display:inline-block;width:7px;height:7px;margin-right:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 5px rgba(141,204,159,.1);animation:pulse 2.2s infinite}
    .tool-link{width:32px;height:32px;border:1px solid var(--line);border-radius:9px;display:grid;place-items:center;color:var(--gold);font-size:19px}
    .tool-link:hover{border-color:var(--gold);background:rgba(233,189,121,.08)}
    .btn-brand,.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:11px 18px;font-weight:800;font-size:14px;transition:var(--ease)}
    .btn-brand{border:1px solid var(--coral);background:var(--coral);color:#21191d}
    .btn-brand:hover{background:#ff8b75;border-color:#ff8b75;color:#21191d;transform:translateY(-2px);box-shadow:0 8px 20px rgba(239,114,95,.2)}
    .btn-outline{border:1px solid var(--line);color:var(--text);background:transparent}
    .btn-outline:hover{border-color:var(--gold);color:var(--gold);background:rgba(233,189,121,.06)}
    .navbar-toggler{border:1px solid var(--line);color:var(--text);padding:8px 11px;border-radius:9px;background:transparent}
    .navbar-toggler:hover,.navbar-toggler:focus{border-color:var(--coral);color:var(--coral)}
    .title-band{padding:76px 0 42px;background:var(--ink);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
    .title-band::after{content:"观看 / 02";position:absolute;right:7%;bottom:28px;color:rgba(239,114,95,.2);font-size:clamp(42px,8vw,116px);font-weight:900;letter-spacing:-.1em;line-height:1}
    .kicker,.section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
    h1,h2,h3{font-weight:850;letter-spacing:-.055em}
    h1{font-size:clamp(42px,6vw,76px);line-height:1.08;margin:13px 0 20px;max-width:780px;position:relative;z-index:1}
    h2{font-size:clamp(30px,4vw,48px);line-height:1.15;margin:0}
    .lead-copy{color:var(--muted);font-size:17px;max-width:720px;margin:0;position:relative;z-index:1}
    .status-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:38px;position:relative;z-index:1}
    .status-chip{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--panel);padding:8px 12px;border-radius:9px;color:var(--muted);font-size:12px}
    .status-chip strong{color:var(--text);font-size:14px}
    .status-chip em{width:6px;height:6px;background:var(--green);border-radius:50%;font-style:normal}
    .section{padding:88px 0}
    .section-paper{background:var(--paper);color:var(--ink)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
    .section-intro{color:var(--muted);max-width:590px;margin:0}
    .section-paper .section-intro{color:#6d6268}
    .guide-layout{display:grid;grid-template-columns:260px 1fr;gap:52px}
    .guide-index{position:sticky;top:104px;align-self:start;border-left:2px solid #d7c9bd;padding-left:22px}
    .guide-index a{display:block;color:#756970;padding:10px 0;font-size:14px}
    .guide-index a:hover,.guide-index a.current{color:var(--coral-dark);font-weight:800}
    .guide-index a.current::before{content:"";display:inline-block;width:18px;height:2px;background:var(--coral);vertical-align:middle;margin-right:8px}
    .timeline{position:relative}
    .timeline::before{content:"";position:absolute;left:29px;top:20px;bottom:20px;width:1px;background:#d8ccc2}
    .timeline-item{display:grid;grid-template-columns:60px 1fr;gap:24px;position:relative;padding-bottom:28px}
    .timeline-number{width:59px;height:59px;border-radius:14px;background:var(--ink);color:var(--gold);display:grid;place-items:center;font:700 13px monospace;position:relative;z-index:1}
    .timeline-card{background:#fbf7f1;border:1px solid #d8cec4;border-radius:var(--radius);padding:23px 27px;transition:var(--ease)}
    .timeline-card:hover{border-color:var(--coral);transform:translateX(4px);box-shadow:0 14px 28px rgba(45,30,35,.1)}
    .timeline-card h3{font-size:22px;margin:0 0 8px}
    .timeline-card p{color:#766a6c;font-size:14px;margin:0 0 13px}
    .tag-row{display:flex;gap:8px;flex-wrap:wrap}
    .badge{display:inline-flex;align-items:center;border:1px solid currentColor;border-radius:99px;padding:3px 8px;font-size:11px;font-weight:700;color:var(--plum)}
    .badge.green{color:#4d8b62}.badge.gold{color:#a8792f}.badge.red{color:var(--coral-dark)}
    .guide-action{color:var(--coral-dark);font-size:13px;font-weight:800;display:inline-block;margin-top:15px}
    .guide-action:hover{color:var(--plum);transform:translateX(3px)}
    .compare-section{background:var(--ink-soft)}
    .compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .compare-panel{border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:var(--panel)}
    .compare-panel.light{background:var(--paper);color:var(--ink);border:0}
    .compare-panel h3{font-size:23px;margin:0 0 22px}
    .compare-row{display:grid;grid-template-columns:115px 1fr 54px;gap:15px;align-items:center;padding:15px 0;border-top:1px solid var(--line);font-size:13px}
    .light .compare-row{border-color:#d7ccc2}
    .compare-row span{color:var(--muted)}.light .compare-row span{color:#756970}
    .bar{height:7px;background:rgba(255,255,255,.1);border-radius:99px;overflow:hidden}
    .light .bar{background:#ddd2c9}
    .bar i{display:block;height:100%;background:var(--coral);border-radius:inherit}
    .compare-row b{font-size:12px;color:var(--gold);text-align:right}.light .compare-row b{color:var(--coral-dark)}
    .safety{border:1px solid rgba(239,114,95,.3);background:#33262e;padding:27px;border-radius:var(--radius);margin-top:24px;display:flex;align-items:flex-start;gap:17px}
    .safety-mark{flex:0 0 38px;height:38px;border:1px solid var(--coral);color:var(--coral);border-radius:10px;display:grid;place-items:center;font-weight:900}
    .safety h3{font-size:20px;margin:0 0 6px}.safety p{color:var(--muted);font-size:13px;margin:0}
    .faq-grid{display:grid;grid-template-columns:.65fr 1.35fr;gap:62px}
    .faq-grid .section-intro{margin-top:18px}
    .accordion-item{background:transparent;border:0;border-bottom:1px solid #d4c9bf}
    .accordion-button{background:transparent!important;color:var(--ink)!important;box-shadow:none!important;padding:20px 0;font-weight:800}
    .accordion-button::after{filter:grayscale(1);opacity:.7}
    .accordion-body{padding:0 0 20px;color:#70646a;font-size:14px}
    .cta{background:var(--paper-soft);color:var(--ink);padding:70px 0}
    .cta-box{display:flex;justify-content:space-between;align-items:center;gap:30px;border-top:1px solid #cfc1b6;border-bottom:1px solid #cfc1b6;padding:30px 0}
    .cta-box h2{font-size:36px}.cta-box p{color:#70646a;margin:10px 0 0;max-width:560px}
    footer{background:var(--ink);padding:58px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:40px;border-bottom:1px solid var(--line)}
    .footer-brand{font-size:19px;font-weight:850;margin-bottom:10px}
    .footer-copy{color:var(--muted);font-size:13px;max-width:280px;margin:0}
    .footer-col{display:flex;flex-direction:column;gap:8px}
    .footer-col h3{font-size:13px;color:var(--gold);letter-spacing:.04em;margin:0 0 8px}
    .footer-col a{color:var(--muted);font-size:13px}.footer-col a:hover{color:var(--coral)}
    .copyright{display:flex;justify-content:space-between;gap:20px;color:#827780;font-size:12px;padding-top:20px}
    .modal-content{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:var(--radius)}
    .modal-header,.modal-footer{border-color:var(--line)}
    .modal .btn-close{filter:invert(1);opacity:.8}
    .modal-body{color:var(--muted);font-size:14px}
    :focus-visible{outline:3px solid var(--gold);outline-offset:3px}
    @keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
    @media(max-width:1199px){.toolbar{gap:18px}.brand{min-width:250px}.header-tools{gap:9px}}
    @media(max-width:991px){
      .toolbar{min-height:66px;flex-wrap:wrap}.navbar-toggler{margin-left:auto}
      .nav-links{display:none;order:4;flex:0 0 100%;padding:10px 0 16px;border-top:1px solid var(--line)}
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .nav-links a{padding:12px 14px}.header-tools{margin-left:auto}
      .guide-layout,.faq-grid{grid-template-columns:1fr;gap:32px}.guide-index{position:static;display:flex;gap:12px;overflow:auto;border-left:0;border-bottom:1px solid #d7c9bd;padding:0 0 10px}.guide-index a{white-space:nowrap}
    }
    @media(max-width:767px){
      .brand{min-width:0}.brand-name{font-size:14px}.status{display:none}
      .title-band{padding:58px 0 35px}.title-band::after{font-size:54px;right:3%;bottom:16px}
      .section{padding:62px 0}.section-head{display:block}.section-head .section-intro{margin-top:15px}
      .timeline-item{grid-template-columns:45px 1fr;gap:15px}.timeline-number{width:45px;height:45px}.timeline::before{left:22px}.timeline-card{padding:20px}.timeline-card h3{font-size:19px}
      .compare-grid{grid-template-columns:1fr}.compare-row{grid-template-columns:90px 1fr 45px}
      .cta-box{display:block}.cta-box .btn-brand{margin-top:22px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:6px}
    }
    @media(max-width:575px){
      .toolbar{gap:10px}.tool-link{display:none}.btn-brand{padding:9px 12px;font-size:13px}
      h1{font-size:40px}.lead-copy{font-size:15px}.status-strip{gap:7px}.status-chip{font-size:11px}
      .footer-grid{grid-template-columns:1fr;gap:25px}.footer-col{border-top:1px solid var(--line);padding-top:18px}
    }
    @media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

/* roulang page: category1 */
:root{
      --ink:#171419;
      --ink-soft:#242027;
      --panel:#2c252d;
      --panel-light:#382f38;
      --paper:#f5f0e9;
      --paper-soft:#ebe3da;
      --text:#fffaf5;
      --muted:#bcb0b9;
      --line:rgba(255,250,245,.14);
      --coral:#ef725f;
      --coral-dark:#c94e4d;
      --plum:#9d527a;
      --gold:#e9bd79;
      --green:#8dcc9f;
      --danger:#e17878;
      --radius:18px;
      --shadow:0 18px 50px rgba(0,0,0,.22);
      --ease:all .25s cubic-bezier(.2,.7,.2,1)
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--ink);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{display:block;max-width:100%;height:auto}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    .container{max-width:1240px}
    .site-header{position:sticky;top:0;z-index:1000;background:rgba(23,20,25,.97);border-bottom:1px solid var(--line);transition:var(--ease)}
    .site-header.scrolled{box-shadow:0 8px 28px rgba(0,0,0,.25);background:rgba(23,20,25,.99)}
    .toolbar{min-height:72px;display:flex;align-items:center;gap:28px}
    .brand{display:flex;align-items:center;gap:11px;min-width:280px;font-weight:800;letter-spacing:-.04em}
    .brand-mark{width:33px;height:33px;display:grid;place-items:center;background:var(--coral);color:var(--ink);border-radius:10px 3px 10px 3px;font-size:16px}
    .brand-name{font-size:16px;white-space:nowrap}
    .nav-links{display:flex;align-items:center;gap:5px;flex:1}
    .nav-links a{position:relative;color:var(--muted);font-size:14px;padding:10px 13px;border-radius:9px}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(239,114,95,.1)}
    .nav-links a.active::after{content:"";height:2px;width:22px;position:absolute;left:13px;bottom:4px;background:var(--coral)}
    .header-tools{display:flex;align-items:center;gap:14px;white-space:nowrap}
    .status{font-size:12px;color:var(--muted)}
    .status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--green);margin-right:6px;box-shadow:0 0 0 4px rgba(141,204,159,.1);animation:pulse 2.5s infinite}
    .tool-link{color:var(--gold);font-size:22px;line-height:1}
    .btn-brand,.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:11px 18px;font-weight:800;font-size:14px;transition:var(--ease)}
    .btn-brand{border:1px solid var(--coral);background:var(--coral);color:#21191d}
    .btn-brand:hover{background:#ff8b75;border-color:#ff8b75;color:#21191d;transform:translateY(-2px);box-shadow:0 8px 20px rgba(239,114,95,.2)}
    .btn-outline{border:1px solid var(--line);color:var(--text);background:transparent}
    .btn-outline:hover{border-color:var(--gold);color:var(--gold);background:rgba(233,189,121,.06)}
    .navbar-toggler{border:1px solid var(--line);color:var(--text);padding:8px 11px;border-radius:9px;background:transparent}
    .hero{position:relative;padding:76px 0 58px;overflow:hidden;background:var(--ink)}
    .hero:before{content:"";position:absolute;right:-160px;top:-170px;width:620px;height:620px;border:1px solid rgba(239,114,95,.2);border-radius:50%;box-shadow:0 0 0 48px rgba(239,114,95,.025),0 0 0 96px rgba(239,114,95,.025)}
    .hero-grid{display:grid;grid-template-columns:1fr .9fr;gap:66px;align-items:center;position:relative}
    .eyebrow,.section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.14em}
    h1{font-size:clamp(40px,5vw,70px);line-height:1.1;letter-spacing:-.07em;margin:16px 0 22px;font-weight:900}
    h1 em{font-style:normal;color:var(--coral)}
    h2{font-size:clamp(28px,3vw,42px);line-height:1.2;letter-spacing:-.06em;font-weight:850}
    .hero-copy{color:var(--muted);font-size:17px;max-width:630px;line-height:1.9}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:29px}
    .hero-note{display:flex;gap:28px;margin-top:30px;color:var(--muted);font-size:12px}
    .hero-note strong{display:block;color:var(--text);font-size:19px;line-height:1.3}
    .visual-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transform:rotate(1deg)}
    .visual-head{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px;margin-bottom:15px}
    .visual-main{height:190px;border-radius:12px;background:linear-gradient(135deg,#533342,#312732 52%,#201c24);padding:21px;display:flex;flex-direction:column;justify-content:end;position:relative;overflow:hidden}
    .visual-main:before{content:"筛选预览";position:absolute;top:20px;left:20px;color:rgba(255,255,255,.55);font-size:11px;letter-spacing:.12em}
    .visual-main:after{content:"18+";position:absolute;right:18px;top:17px;border:1px solid rgba(255,255,255,.35);padding:3px 8px;border-radius:5px;color:#fff;font:700 12px monospace}
    .visual-main strong{font-size:27px;letter-spacing:-.05em}
    .visual-main span{color:#ddcbd0;font-size:13px}
    .visual-row{display:flex;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line);font-size:13px}
    .visual-row:last-child{border:0}
    .visual-row span{color:var(--muted)}
    .visual-row b{color:var(--green)}
    .section{padding:78px 0}
    .section-paper{background:var(--paper);color:var(--ink)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px}
    .section-intro{color:var(--muted);max-width:570px;margin:0}
    .section-paper .section-intro{color:#6d6268}
    .filter-bar{display:flex;gap:9px;flex-wrap:wrap;padding:14px;border:1px solid #d8cec4;background:#fbf7f1;border-radius:14px;margin-bottom:30px}
    .filter-chip{border:1px solid #d6c9c1;background:transparent;color:#6d6268;border-radius:8px;padding:8px 14px;font-size:13px;transition:var(--ease)}
    .filter-chip:hover,.filter-chip.active,.filter-chip:focus{background:var(--ink);color:var(--text);border-color:var(--ink);outline:0}
    .content-layout{display:grid;grid-template-columns:1.08fr .92fr;gap:22px}
    .main-card{min-height:390px;background:var(--ink);border-radius:var(--radius);padding:30px;color:var(--text);position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:end}
    .main-card:before{content:"";position:absolute;inset:0;background:linear-gradient(145deg,rgba(239,114,95,.48),transparent 38%,rgba(23,20,25,.88));opacity:.8}
    .main-card>*{position:relative}
    .main-card .number{position:absolute;top:24px;right:25px;color:var(--gold);font:700 12px monospace}
    .badge{display:inline-flex;align-items:center;border:1px solid currentColor;border-radius:99px;padding:3px 8px;font-size:11px;font-weight:700;color:var(--plum);width:max-content}
    .main-card .badge{color:var(--gold)}
    .main-card h3{font-size:30px;letter-spacing:-.05em;margin:17px 0 8px}
    .main-card p{color:var(--muted);font-size:14px;max-width:440px;margin:0 0 20px}
    .entry-list{background:#fbf7f1;border:1px solid #d8cec4;border-radius:var(--radius);padding:22px 25px}
    .entry-list h3{font-size:18px;margin:0 0 8px}
    .entry{display:grid;grid-template-columns:38px 1fr auto;gap:13px;align-items:center;padding:18px 0;border-top:1px solid #ded3ca}
    .entry:first-of-type{margin-top:10px}
    .entry-index{color:var(--coral);font:700 13px monospace}
    .entry strong{font-size:15px;display:block}
    .entry small{display:block;color:#81747a;font-size:12px;margin-top:3px}
    .entry a{color:var(--coral-dark);font-size:12px;font-weight:800}
    .note-box{margin-top:24px;padding:18px 20px;border-left:3px solid var(--gold);background:rgba(233,189,121,.1);color:#6b5b50;font-size:13px}
    .compare-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px;align-items:start}
    .compare-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:25px}
    .compare-line{display:grid;grid-template-columns:125px 1fr 68px;gap:15px;align-items:center;margin:18px 0;font-size:13px}
    .compare-line>span{color:var(--muted)}
    .meter{height:7px;background:#4a3e48;border-radius:9px;overflow:hidden}
    .meter i{height:100%;display:block;background:var(--coral);border-radius:9px}
    .compare-line b{font-size:12px;color:var(--text);text-align:right}
    .faq-section{background:var(--paper);color:var(--ink)}
    .faq-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:58px}
    .faq-grid .section-intro{margin-top:15px}
    .accordion-item{background:transparent;border:0;border-bottom:1px solid #d4c9bf}
    .accordion-button{background:transparent!important;color:var(--ink)!important;box-shadow:none!important;padding:20px 0;font-weight:800}
    .accordion-button:after{filter:brightness(.3)}
    .accordion-body{padding:0 25px 20px 0;color:#6d6268;font-size:14px}
    .cta{padding:56px 0;background:var(--coral);color:#251b20}
    .cta-box{display:flex;justify-content:space-between;align-items:center;gap:25px}
    .cta h2{margin:0 0 8px}
    .cta p{margin:0;color:#5f3b3c;font-size:14px}
    .cta .btn-outline{border-color:#542c35;color:#321d24}
    .cta .btn-outline:hover{border-color:#321d24;color:#321d24;background:rgba(255,255,255,.18)}
    footer{background:var(--ink-soft);padding:55px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--line)}
    .footer-brand{font-size:20px;font-weight:900;letter-spacing:-.05em}
    .footer-copy{color:var(--muted);font-size:13px;max-width:300px;margin-top:12px}
    .footer-col{display:flex;flex-direction:column;gap:8px}
    .footer-col h3{font-size:13px;color:var(--gold);margin:0 0 8px}
    .footer-col a{color:var(--muted);font-size:13px}
    .footer-col a:hover{color:var(--coral)}
    .copyright{display:flex;justify-content:space-between;gap:20px;padding-top:18px;color:#887b85;font-size:12px}
    .modal-content{background:var(--panel);color:var(--text);border:1px solid var(--line)}
    .modal-header,.modal-footer{border-color:var(--line)}
    .modal .btn-close{filter:invert(1)}
    .modal-body{color:var(--muted);font-size:14px}
    .modal-body strong{color:var(--gold)}
    :focus-visible{outline:3px solid var(--gold);outline-offset:3px}
    @keyframes pulse{50%{opacity:.45;transform:scale(.85)}}
    @media(max-width:1199px){.brand{min-width:245px}.toolbar{gap:18px}.hero-grid{gap:40px}}
    @media(max-width:991px){
      .toolbar{min-height:65px;flex-wrap:wrap;padding:10px 0}
      .brand{min-width:0;flex:1}.brand-name{font-size:14px}
      .nav-links{display:none;order:4;flex-basis:100%;flex-direction:column;align-items:stretch;padding:10px 0}
      .nav-links.show{display:flex}.nav-links a{padding:12px}
      .header-tools{margin-left:auto}.header-tools .status,.header-tools .tool-link{display:none}
      .hero-grid,.content-layout,.compare-wrap,.faq-grid{grid-template-columns:1fr}
      .hero{padding-top:55px}.visual-panel{max-width:620px}
      .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
    }
    @media(max-width:767px){
      .section{padding:60px 0}.section-head,.cta-box{display:block}
      .section-head .section-intro{margin-top:13px}.cta .btn-outline{margin-top:20px}
      .hero-note{gap:18px}.main-card{min-height:330px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-grid>div:first-child{grid-column:1/-1}
      .copyright{display:block}.copyright span{display:block;margin-top:6px}
    }
    @media(max-width:575px){
      .container{padding-left:20px;padding-right:20px}
      h1{font-size:41px}.hero-copy{font-size:15px}
      .header-tools .btn-brand{padding:9px 11px;font-size:12px}.brand-name{white-space:normal;line-height:1.2}
      .entry{grid-template-columns:29px 1fr;gap:9px}.entry a{grid-column:2}
      .compare-line{grid-template-columns:1fr auto;gap:7px}.compare-line .meter{grid-column:1/-1;grid-row:2}
      .footer-grid{grid-template-columns:1fr}
    }
    @media(prefers-reduced-motion:reduce){
      *,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}
    }