/* roulang page: index */
:root{
  --brand:#0F4A3C;--brand-dark:#0A3229;--accent:#C08A3E;--accent-soft:#E8D3AE;
  --bg:#F7F5F0;--bg-alt:#EEF1EC;--dark:#10201C;
  --ink:#1C2B27;--muted:#566661;--faint:#8A9993;--line:#DCD9D0;--warn:#B4453A;
  --radius-card:14px;--radius-btn:10px;
  --shadow-card:0 1px 2px rgba(16,32,28,.06),0 10px 26px -16px rgba(16,32,28,.28);
  --font-base:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-base);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1.1em}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--ink)}
h3{font-size:20px;line-height:1.45}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.site-container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.text-body{max-width:72ch}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:var(--radius-btn);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease}
.btn-primary{background:var(--brand);color:#F7F5F0;box-shadow:0 1px 2px rgba(16,32,28,.12)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--bg-alt)}
.btn-light{background:#F7F5F0;color:var(--brand);border-color:#F7F5F0}
.btn-light:hover{background:#fff;transform:translateY(-1px)}
.btn-outline-light{background:transparent;border-color:rgba(247,245,240,.5);color:#F7F5F0}
.btn-outline-light:hover{background:rgba(247,245,240,.12)}
.btn-block{width:100%}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);border-bottom:1px solid rgba(15,74,60,.3);padding-bottom:1px;transition:color .18s,border-color .18s}
.text-link:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(247,245,240,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;flex-direction:column;justify-content:center;line-height:1.2;flex:0 0 auto;min-width:0}
.brand-name{font-size:17px;font-weight:700;color:var(--brand);letter-spacing:-.01em;white-space:nowrap}
.brand-sub{font-size:11px;color:var(--faint);letter-spacing:.05em;margin-top:3px;font-weight:400}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:auto}
.main-nav a{position:relative;font-size:15px;color:var(--muted);padding:6px 0;transition:color .18s}
.main-nav a:hover,.main-nav a.active{color:var(--brand)}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;border-radius:2px;background:var(--accent)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-actions .btn{min-height:40px;padding:0 16px;font-size:14px}
.nav-toggle{display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--brand);align-items:center;justify-content:center;cursor:pointer}
.mobile-nav{display:none;border-top:1px solid var(--line);background:var(--bg);padding:12px 20px 20px}
.mobile-nav a{display:block;padding:12px 4px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-nav .btn{margin-top:16px}

/* ---------- 进度步骤条 ---------- */
.steps-bar{background:var(--bg-alt);border-bottom:1px solid var(--line)}
.steps-inner{display:flex;align-items:center;height:56px;overflow-x:auto;scrollbar-width:none}
.steps-inner::-webkit-scrollbar{display:none}
.step-item{display:flex;align-items:center;gap:8px;flex:0 0 auto;padding:0 14px;font-size:13px;color:var(--muted);white-space:nowrap;transition:color .18s}
.step-item:first-child{padding-left:0}
.step-num{width:24px;height:24px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;font-size:12px;color:var(--faint);font-variant-numeric:tabular-nums;transition:.18s}
.step-item:hover{color:var(--brand)}
.step-item:hover .step-num{border-color:var(--accent);color:var(--accent)}
.step-item.is-active{color:var(--brand);font-weight:600}
.step-item.is-active .step-num{background:var(--accent);border-color:var(--accent);color:#fff}
.step-line{flex:0 0 36px;min-width:20px;height:1px;background:rgba(192,138,62,.4)}

/* ---------- 通用 section ---------- */
.section{padding:88px 0}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:38px}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--accent);margin-bottom:12px}
.section-title{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;margin-bottom:12px}
.section-desc{color:var(--muted);font-size:15px;line-height:1.85;margin:0;max-width:72ch}

/* ---------- Hero ---------- */
.hero{padding:64px 0 76px;background:linear-gradient(180deg,#F7F5F0 0%,#EEF1EC 100%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:start}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;color:var(--accent);letter-spacing:.08em}
.hero-tag::before{content:"";width:22px;height:1px;background:var(--accent)}
.hero h1{font-size:clamp(30px,4.2vw,46px);line-height:1.15;letter-spacing:-.01em;margin:14px 0 18px}
.hero-lead{font-size:16px;line-height:1.9;color:var(--muted);margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-note{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.7}
.hero-badges{display:flex;flex-wrap:wrap;gap:20px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.hero-badges span{display:inline-flex;align-items:center;gap:6px}
.hero-badges span::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent)}

.roadmap-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:22px}
.roadmap-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px dashed var(--line)}
.roadmap-tag{font-size:13px;font-weight:700;color:var(--brand)}
.roadmap-ver{font-size:12px;color:var(--faint)}
.roadmap-list{display:grid;gap:16px;margin:18px 0 0}
.roadmap-list li{display:flex;gap:12px;min-width:0}
.rm-dot{flex:0 0 10px;width:10px;height:10px;border-radius:50%;background:var(--brand);margin-top:8px}
.rm-dot.gold{background:var(--accent)}
.roadmap-list strong{display:block;font-size:14px;color:var(--ink);margin-bottom:2px}
.roadmap-list p{font-size:12.5px;line-height:1.7;color:var(--muted);margin:0}
.subscribe{margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}
.subscribe label{display:block;font-size:12px;color:var(--muted);margin-bottom:8px}
.subscribe-row{display:flex;gap:8px}
.subscribe-row input{flex:1 1 auto;min-width:0;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);padding:0 12px;background:var(--bg);font-size:14px;transition:border-color .18s,box-shadow .18s}
.subscribe-row input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(15,74,60,.14)}
.subscribe-row .btn{padding:0 16px;font-size:14px;flex:0 0 auto}

/* ---------- 指标看板 ---------- */
.board{background:var(--dark);color:#F7F5F0;padding:72px 0}
.board .section-title{color:#F7F5F0}
.board .section-desc{color:rgba(247,245,240,.7)}
.board-top{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px}
.board-note{font-size:12px;color:rgba(247,245,240,.5)}
.board-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid rgba(255,255,255,.08);border-left:1px solid rgba(255,255,255,.08)}
.board-cell{padding:24px 22px;border-right:1px solid rgba(255,255,255,.08);border-bottom:1px solid rgba(255,255,255,.08);min-width:0}
.board-cell .k{font-size:12.5px;color:rgba(247,245,240,.55);margin-bottom:10px}
.board-cell .v{font-size:20px;font-weight:600;line-height:1.35;color:#F7F5F0;font-variant-numeric:tabular-nums;word-break:normal}
.board-cell .v em{font-style:normal;font-size:13px;font-weight:400;color:rgba(247,245,240,.6);margin-left:4px}
.board-cell .d{font-size:12px;color:rgba(247,245,240,.5);margin-top:8px;line-height:1.7}

/* ---------- 服务矩阵 ---------- */
.matrix{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr) minmax(0,1fr);gap:20px}
.matrix-lead{grid-row:span 2;background:var(--brand);color:#F7F5F0;border-radius:var(--radius-card);padding:30px 28px;display:flex;flex-direction:column;min-width:0}
.matrix-lead h3{color:#F7F5F0;font-size:22px;margin-bottom:12px}
.matrix-lead p{color:rgba(247,245,240,.78);font-size:14px;line-height:1.85}
.matrix-lead ul{display:grid;gap:10px;margin:18px 0 0}
.matrix-lead li{display:flex;gap:10px;font-size:14px;color:rgba(247,245,240,.9);line-height:1.7}
.matrix-lead li::before{content:"";flex:0 0 6px;width:6px;height:6px;border-radius:50%;background:var(--accent-soft);margin-top:9px}
.matrix-lead .text-link{color:var(--accent-soft);border-color:rgba(232,211,174,.45);margin-top:auto;padding-top:20px}
.matrix-lead .text-link:hover{color:#fff;border-color:#fff}
.m-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;display:flex;flex-direction:column;min-width:0;transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease}
.m-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.m-icon{width:34px;height:34px;border-radius:9px;background:var(--bg-alt);border:1px solid var(--line);display:grid;place-items:center;color:var(--brand);font-size:13px;font-weight:700;margin-bottom:14px}
.m-card h3{font-size:17px;margin-bottom:8px}
.m-card p{font-size:13.5px;line-height:1.8;color:var(--muted);margin:0}
.m-card .text-link{margin-top:16px;font-size:13px}

/* ---------- 方案对比 ---------- */
.compare{display:grid;grid-template-columns:minmax(0,1fr) 1px minmax(0,1fr);gap:0;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden}
.plan{padding:26px 24px;min-width:0}
.plan-head{padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:16px}
.plan-head h3{font-size:19px;margin-bottom:6px}
.plan-head p{font-size:13px;color:var(--muted);margin:0;line-height:1.7}
.plan-rows{display:grid;gap:0}
.plan-row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.plan-row:last-child{border-bottom:0}
.plan-row .k{color:var(--muted);flex:1 1 auto;min-width:0}
.plan-row .v{font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;text-align:right;flex:0 0 auto}
.plan-row.diff .v{color:var(--brand)}
.plan-row.diff{background:rgba(232,211,174,.2);box-shadow:inset 3px 0 0 var(--accent);padding-left:10px;margin-left:-10px}
.compare-divider{background:var(--line);position:relative}
.compare-divider::after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--bg)}
.compare-foot{font-size:12px;color:var(--faint);margin-top:16px;line-height:1.7}

/* ---------- 上手四步 ---------- */
.steps4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step4-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:24px 20px;min-width:0;scroll-margin-top:140px;transition:border-color .18s,transform .18s,box-shadow .18s}
.step4-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.step4-num{display:block;font-size:44px;line-height:1;font-weight:700;color:rgba(192,138,62,.3);font-variant-numeric:tabular-nums;margin-bottom:10px}
.step4-card h3{font-size:17px;margin-bottom:8px}
.step4-card p{font-size:13.5px;line-height:1.8;color:var(--muted);margin:0}
.step4-figure{margin-top:16px;height:88px;border-radius:10px;border:1px solid var(--line);background:repeating-linear-gradient(135deg,#EEF1EC 0 10px,#F7F5F0 10px 20px);display:grid;place-items:center;font-size:12px;color:var(--faint)}
.step4-card:not(:last-child)::after{content:"→";position:absolute;right:-16px;top:38px;font-size:15px;color:var(--accent);line-height:1}
@media (max-width:1023px){.step4-card:not(:last-child)::after{display:none}}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:30px;border-left:1px solid var(--line);display:grid;gap:30px;max-width:860px}
.tl-item{position:relative;min-width:0}
.tl-item::before{content:"";position:absolute;left:-36px;top:9px;width:10px;height:10px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 3px var(--bg)}
.tl-tag{display:inline-block;font-size:12px;font-weight:600;color:var(--accent);letter-spacing:.06em;margin-bottom:6px}
.tl-item h3{font-size:18px;margin-bottom:6px}
.tl-item p{font-size:14px;line-height:1.85;color:var(--muted);margin:0}

/* ---------- 下载区 ---------- */
.download-band{background:var(--dark);color:#F7F5F0;padding:80px 0}
.download-band .section-title{color:#F7F5F0}
.download-band .section-desc{color:rgba(247,245,240,.72)}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:34px}
.dl-card{border-radius:var(--radius-card);padding:26px 22px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);display:flex;flex-direction:column;min-width:0;transition:border-color .18s,transform .18s}
.dl-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.dl-card.is-main{background:var(--brand);border-color:var(--brand);box-shadow:var(--shadow-card)}
.dl-icon{width:38px;height:38px;border-radius:10px;background:rgba(247,245,240,.12);display:grid;place-items:center;font-size:13px;font-weight:700;color:#F7F5F0;margin-bottom:14px}
.dl-card h3{color:#F7F5F0;font-size:18px;margin-bottom:6px}
.dl-card p{font-size:13px;line-height:1.75;color:rgba(247,245,240,.72);margin:0 0 18px}
.dl-card .btn{margin-top:auto}
.dl-status{font-size:12px;color:rgba(247,245,240,.55);margin-top:10px;line-height:1.6}
.download-tip{font-size:12px;color:rgba(247,245,240,.5);margin-top:22px;line-height:1.7}

/* ---------- 场景专题 ---------- */
.scene-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:28px;align-items:start}
.scene-tabs{display:grid;gap:10px}
.scene-tab{text-align:left;border:1px solid var(--line);background:#fff;border-radius:10px;padding:14px 16px;cursor:pointer;font-size:14px;font-weight:600;color:var(--muted);transition:.18s}
.scene-tab:hover{border-color:var(--accent);color:var(--brand)}
.scene-tab.is-active{background:var(--brand);border-color:var(--brand);color:#F7F5F0}
.scene-panel{display:none}
.scene-panel.is-active{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.scene-card{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;min-width:0;transition:border-color .18s,transform .18s}
.scene-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.scene-thumb{flex:0 0 64px;width:64px;height:64px;border-radius:10px;background:linear-gradient(145deg,#EEF1EC,#E8D3AE);display:grid;place-items:center;font-size:12px;font-weight:700;color:var(--brand);text-align:center;line-height:1.3}
.scene-card h3{font-size:15px;margin-bottom:4px}
.scene-card p{font-size:13px;line-height:1.7;color:var(--muted);margin:0}

/* ---------- 参数说明 ---------- */
.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:40px;align-items:start}
.split h2{font-size:clamp(21px,2.4vw,27px);margin-bottom:14px}
.split p{font-size:14.5px;line-height:1.9;color:var(--muted)}
.kv{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden}
.kv-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:14px 20px;border-bottom:1px dashed var(--line);transition:background-color .18s}
.kv-row:last-child{border-bottom:0}
.kv-row:hover{background:var(--bg-alt)}
.kv-row .k{font-size:14px;color:var(--muted);flex:0 1 auto;min-width:0}
.kv-row .v{font-size:14px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;text-align:right;flex:0 1 auto;min-width:0}

/* ---------- 资讯 ---------- */
.news-layout{display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:28px;align-items:start}
.news-lead{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;transition:border-color .18s,transform .18s,box-shadow .18s}
.news-lead:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.news-cover{position:relative;aspect-ratio:16/9;border-radius:10px;border:1px solid var(--line);background:linear-gradient(135deg,#0F4A3C 0%,#1c6b57 55%,#0A3229 100%);display:flex;align-items:flex-end;padding:14px;margin-bottom:16px;overflow:hidden}
.news-cover span{font-size:12px;color:rgba(247,245,240,.85);background:rgba(0,0,0,.22);border:1px solid rgba(247,245,240,.25);border-radius:6px;padding:3px 8px}
.news-lead h3{font-size:19px;line-height:1.5;margin:10px 0 8px;transition:color .18s}
.news-lead:hover h3{color:var(--brand)}
.news-lead p{font-size:13.5px;line-height:1.8;color:var(--muted);margin:0 0 12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--faint)}
.badge-cat{display:inline-block;font-size:12px;font-weight:600;color:var(--brand);background:rgba(232,211,174,.35);border-radius:6px;padding:2px 8px;line-height:1.6}
.news-list{display:grid;gap:0;margin-top:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden}
.news-item{display:block;padding:16px 20px;border-bottom:1px dashed var(--line);transition:background-color .18s}
.news-item:last-child{border-bottom:0}
.news-item:hover{background:var(--bg-alt)}
.news-item h4{font-size:15px;font-weight:600;line-height:1.6;margin:0 0 6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .18s}
.news-item:hover h4{color:var(--brand)}
.news-item p{font-size:12.5px;color:var(--faint);margin:0;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.news-side{background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius-card);padding:22px}
.news-side h3{font-size:15px;margin-bottom:12px}
.news-side ul{display:grid;gap:12px;margin-bottom:18px}
.news-side li{font-size:13px;color:var(--muted);line-height:1.7;padding-left:14px;position:relative}
.news-side li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:2px;background:var(--accent)}
.empty-state{padding:56px 20px;text-align:center;border:1px dashed var(--line);border-radius:var(--radius-card);background:#fff}
.empty-state p{font-size:14px;color:var(--muted);margin-bottom:16px}

/* ---------- 保障条带 ---------- */
.assure{display:grid;gap:0;border-top:1px solid var(--line)}
.assure-row{display:grid;grid-template-columns:34px minmax(0,220px) minmax(0,1fr);gap:18px;align-items:start;padding:22px 0;border-bottom:1px solid var(--line)}
.assure-ico{width:28px;height:28px;border-radius:8px;background:var(--bg-alt);border:1px solid var(--line);display:grid;place-items:center;font-size:12px;font-weight:700;color:var(--brand)}
.assure-row h3{font-size:16px;margin:0}
.assure-row p{font-size:13.5px;line-height:1.8;color:var(--muted);margin:0}

/* ---------- 快速解答 ---------- */
.qa-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.qa-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;min-width:0}
.qa-card h3{font-size:16px;margin-bottom:10px}
.qa-card p{font-size:13.5px;line-height:1.85;color:var(--muted);margin:0 0 14px}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 0;font-size:16px;font-weight:600;color:var(--ink);transition:color .18s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-plus{flex:0 0 24px;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:var(--muted);transition:.18s}
.faq-plus::before{content:"+"}
.faq-item[open] .faq-plus{background:var(--accent);border-color:var(--accent);color:#fff}
.faq-item[open] .faq-plus::before{content:"−"}
.faq-body{padding:0 0 20px;font-size:14px;line-height:1.85;color:var(--muted);max-width:72ch}

/* ---------- 风险提示 ---------- */
.risk-strip{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0}
.risk-inner{display:flex;gap:16px;align-items:flex-start}
.risk-bar{flex:0 0 3px;width:3px;align-self:stretch;background:var(--warn);border-radius:2px}
.risk-inner h3{font-size:14px;font-weight:700;color:var(--warn);margin-bottom:6px}
.risk-inner p{font-size:13px;line-height:1.8;color:var(--muted);margin:0}

/* ---------- 表单 ---------- */
.contact-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:40px;align-items:start}
.contact-list{display:grid;gap:12px;margin-top:8px}
.contact-list li{display:flex;gap:10px;font-size:14px;color:var(--muted);line-height:1.75}
.contact-list li::before{content:"";flex:0 0 6px;width:6px;height:6px;border-radius:2px;background:var(--accent);margin-top:9px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow-card)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.input,.select,.textarea{width:100%;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);padding:0 12px;background:#fff;font-size:15px;transition:border-color .18s,box-shadow .18s}
.textarea{height:auto;min-height:112px;padding:10px 12px;resize:vertical;line-height:1.7}
.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(15,74,60,.14)}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--muted);margin:4px 0 18px;line-height:1.7}
.check-row input{margin-top:5px;width:16px;height:16px;accent-color:var(--brand);flex:0 0 16px}
.form-hint{font-size:12px;color:var(--faint);margin-top:12px;line-height:1.7}
.form-msg{font-size:13px;color:var(--brand);margin-top:12px;display:none}
.form-msg.is-visible{display:block}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(247,245,240,.7);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:34px;padding-bottom:44px}
.footer-brand .brand-name{color:#F7F5F0;font-size:18px}
.footer-brand .brand-sub{color:rgba(247,245,240,.5)}
.footer-brand p{font-size:13px;line-height:1.9;margin:14px 0 0;max-width:34ch}
.footer-col h4{font-size:13px;color:#F7F5F0;margin-bottom:14px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:13px;color:rgba(247,245,240,.65);transition:color .18s}
.footer-col a:hover{color:var(--accent-soft)}
.footer-col p{font-size:12.5px;line-height:1.85;margin:0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0 24px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12px;color:rgba(247,245,240,.45)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-inner{gap:16px}
  .main-nav{gap:16px;font-size:14px}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:36px}
  .matrix{grid-template-columns:repeat(2,minmax(0,1fr))}
  .matrix-lead{grid-row:span 1;grid-column:span 2}
  .steps4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-layout{grid-template-columns:minmax(0,1fr)}
  .news-side{order:-1}
  .download-band{padding:64px 0}
  .section{padding:64px 0}
  .split,.contact-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .scene-layout{grid-template-columns:minmax(0,1fr);gap:20px}
  .scene-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .board-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .main-nav,.nav-actions{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-nav.is-open{display:block}
}
@media (max-width:768px){
  .section{padding:52px 0}
  .hero{padding:44px 0 56px}
  .steps-inner{height:52px}
  .dl-grid{grid-template-columns:minmax(0,1fr);gap:14px}
  .qa-grid{grid-template-columns:minmax(0,1fr)}
  .scene-panel.is-active{grid-template-columns:minmax(0,1fr)}
  .assure-row{grid-template-columns:28px minmax(0,1fr);gap:12px 14px}
  .assure-row p{grid-column:2;min-width:0}
  .compare{grid-template-columns:minmax(0,1fr)}
  .compare-divider{height:1px;width:auto}
  .compare-divider::after{display:none}
  .plan{padding:22px 18px}
  .timeline{padding-left:22px}
  .tl-item::before{left:-28px}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .brand-name{font-size:15px}
  .brand-sub{font-size:10px}
  .matrix{grid-template-columns:minmax(0,1fr)}
  .matrix-lead{grid-column:span 1}
  .steps4{grid-template-columns:minmax(0,1fr)}
  .scene-tabs{grid-template-columns:minmax(0,1fr)}
  .board-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .plan-row{flex-wrap:wrap;gap:4px}
  .plan-row .v{text-align:left}
  .kv-row{flex-wrap:wrap;gap:4px}
  .kv-row .v{text-align:left}
  .form-card{padding:20px}
  .step-item{padding:0 10px;font-size:12px}
  .step-line{flex:0 0 20px}
}

/* roulang page: category1 */
:root{
  --brand:#0F4A3C;--brand-dark:#0A3229;--accent:#C08A3E;--accent-soft:#E8D3AE;
  --bg:#F7F5F0;--bg-alt:#EEF1EC;--dark:#10201C;
  --ink:#1C2B27;--muted:#566661;--faint:#8A9993;--line:#DCD9D0;--warn:#B4453A;
  --radius-card:14px;--radius-btn:10px;
  --shadow-card:0 1px 2px rgba(16,32,28,.06),0 10px 26px -16px rgba(16,32,28,.28);
  --font-base:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-base);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
.site-container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.text-body{max-width:72ch}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:var(--radius-btn);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease}
.btn-primary{background:var(--brand);color:#F7F5F0;box-shadow:0 1px 2px rgba(16,32,28,.12)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--bg-alt)}
.btn-light{background:#F7F5F0;color:var(--brand);border-color:#F7F5F0}
.btn-light:hover{background:#fff;transform:translateY(-1px)}
.btn-outline-light{background:transparent;border-color:rgba(247,245,240,.5);color:#F7F5F0}
.btn-outline-light:hover{background:rgba(247,245,240,.12)}
.btn-block{width:100%}
.btn:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);border-bottom:1px solid rgba(15,74,60,.3);padding-bottom:1px;transition:color .18s,border-color .18s}
.text-link:hover{color:var(--accent);border-color:var(--accent)}
/* header */
.site-header{position:sticky;top:0;z-index:80;background:rgba(247,245,240,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;flex-direction:column;justify-content:center;line-height:1.2;flex:0 0 auto;min-width:0}
.brand-name{font-size:17px;font-weight:700;color:var(--brand);letter-spacing:-.01em;white-space:nowrap}
.brand-sub{font-size:11px;color:var(--faint);letter-spacing:.05em;margin-top:3px;font-weight:400}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:auto}
.main-nav a{position:relative;font-size:15px;color:var(--muted);padding:6px 0;transition:color .18s}
.main-nav a:hover,.main-nav a.active{color:var(--brand)}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;border-radius:2px;background:var(--accent)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-actions .btn{min-height:40px;padding:0 16px;font-size:14px}
.nav-toggle{display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--brand);align-items:center;justify-content:center;cursor:pointer}
.mobile-nav{display:none;border-top:1px solid var(--line);background:var(--bg);padding:12px 20px 20px}
.mobile-nav a{display:block;padding:12px 4px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-nav .btn{margin-top:16px}
/* step nav */
.step-bar{background:var(--bg-alt);border-bottom:1px solid var(--line)}
.step-track{display:flex;align-items:center;gap:0;height:56px;overflow-x:auto;scroll-snap-type:x proximity;scrollbar-width:none}
.step-track::-webkit-scrollbar{display:none}
.step-item{display:flex;align-items:center;gap:8px;flex:0 0 auto;padding:0 14px;font-size:13px;color:var(--muted);white-space:nowrap;transition:color .18s;scroll-snap-align:start}
.step-item:first-child{padding-left:0}
.step-item:hover{color:var(--brand)}
.step-item:hover .step-num{border-color:var(--accent);color:var(--accent)}
.step-item.is-active{color:var(--brand);font-weight:600}
.step-item.is-active .step-num{background:var(--accent);border-color:var(--accent);color:#fff}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);font-size:12px;font-weight:600;color:var(--muted);background:transparent;transition:all .18s}
.step-sep{flex:0 0 28px;height:1px;background:rgba(192,138,62,.4)}
/* section base */
.section{padding:88px 0}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:38px}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--accent);margin-bottom:12px}
.section-title{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;margin-bottom:12px}
.section-desc{color:var(--muted);font-size:15px;line-height:1.85;margin:0;max-width:72ch}
/* C0 page head */
.page-head{background:var(--bg-alt);border-bottom:1px solid var(--line);padding:44px 0 48px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--faint);margin-bottom:18px}
.crumb a{color:var(--muted);transition:color .18s}
.crumb a:hover{color:var(--brand)}
.crumb i{font-size:10px;color:var(--faint)}
.page-head-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,260px);gap:40px;align-items:end}
.page-head h1{font-size:clamp(26px,3.4vw,38px);line-height:1.25;letter-spacing:-.01em;margin-bottom:14px}
.page-head .lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:66ch;margin:0}
.head-stats{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.head-stat{background:#fff;padding:14px 16px;display:flex;align-items:baseline;justify-content:space-between;gap:10px}
.head-stat span:first-child{font-size:12.5px;color:var(--muted)}
.head-stat span:last-child{font-size:20px;font-weight:600;color:var(--brand);font-variant-numeric:tabular-nums}
/* C1 cards */
.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.topic-card{min-width:0;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.topic-card:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:var(--shadow-card)}
.topic-card .tag{display:inline-flex;align-self:flex-start;align-items:center;font-size:12px;font-weight:600;color:var(--brand);background:rgba(232,211,174,.4);border-left:3px solid var(--accent);border-radius:6px;padding:2px 10px;margin-bottom:12px}
.topic-card h3{font-size:19px;line-height:1.5;font-weight:600;margin-bottom:10px}
.topic-card h3 a{transition:color .18s}
.topic-card:hover h3 a{color:var(--accent)}
.topic-card p{font-size:14px;line-height:1.8;color:var(--muted);margin-bottom:16px}
.topic-card .meta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;color:var(--faint)}
.topic-card .meta i{margin-right:5px}
.list-more{display:flex;justify-content:center;margin-top:34px}
.empty-state{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:48px 24px;text-align:center;color:var(--muted)}
.empty-state i{font-size:26px;color:var(--faint);margin-bottom:12px;display:block}
.empty-state p{font-size:14px;margin-bottom:16px}
/* C2 numbered points */
.point-list{display:grid;gap:22px;max-width:760px}
.point-item{display:flex;gap:18px;min-width:0}
.point-num{flex:0 0 28px;font-size:15px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.7}
.point-item h3{font-size:17px;font-weight:600;margin-bottom:4px}
.point-item p{font-size:14px;line-height:1.8;color:var(--muted);margin:0}
/* C3 dictionary */
.dict{max-width:860px;border-top:1px solid var(--line)}
.dict-row{display:grid;grid-template-columns:180px minmax(0,1fr);gap:20px;padding:14px 0;border-bottom:1px dashed var(--line);transition:background-color .18s}
.dict-row:hover{background:var(--bg-alt)}
.dict-row dt{font-size:15px;font-weight:600;color:var(--ink)}
.dict-row dd{margin:0;font-size:14px;line-height:1.8;color:var(--muted)}
/* C4 myth vs fact */
.myth-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.myth-col{border-radius:var(--radius-card);padding:22px;min-width:0}
.myth-col.bad{background:rgba(180,69,58,.08);border-left:3px solid var(--warn)}
.myth-col.good{background:rgba(15,74,60,.08);border-left:3px solid var(--brand)}
.myth-col h3{font-size:15px;font-weight:700;margin-bottom:14px;letter-spacing:.02em}
.myth-col.bad h3{color:var(--warn)}
.myth-col.good h3{color:var(--brand)}
.myth-col li{font-size:14px;line-height:1.8;color:var(--muted);padding:10px 0;border-bottom:1px dashed rgba(220,217,208,.9)}
.myth-col li:last-child{border-bottom:none}
/* C5 checklist */
.check-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,300px);gap:40px;align-items:start}
.check-list{display:grid;gap:0;border-top:1px solid var(--line)}
.check-item{display:flex;align-items:center;gap:12px;min-height:44px;padding:12px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink)}
.check-box{flex:0 0 18px;width:18px;height:18px;border:1px solid var(--accent);border-radius:4px;background:#fff;position:relative}
.check-box::after{content:"";position:absolute;left:4px;top:7px;width:8px;height:4px;border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(-45deg)}
.check-note{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:20px}
.check-note h3{font-size:15px;font-weight:600;margin-bottom:10px;color:var(--brand)}
.check-note p{font-size:13.5px;line-height:1.8;color:var(--muted);margin-bottom:10px}
.check-note p:last-child{margin-bottom:0}
/* FAQ */
.faq-list{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;cursor:pointer;font-size:16px;font-weight:600;list-style:none;transition:color .18s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-icon{flex:0 0 24px;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-size:12px;color:var(--muted);transition:all .18s}
.faq-item[open] .faq-icon{background:var(--accent);border-color:var(--accent);color:#fff}
.faq-body{padding:0 0 20px;font-size:14px;line-height:1.85;color:var(--muted);max-width:72ch}
/* C7 reading list */
.read-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 32px}
.read-item{display:flex;align-items:center;gap:10px;min-width:0;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.read-item::before{content:"";flex:0 0 6px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.read-item a{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;transition:color .18s}
.read-item a:hover{color:var(--brand)}
.read-item time{margin-left:auto;flex:0 0 auto;font-size:12.5px;color:var(--faint);font-variant-numeric:tabular-nums}
/* C8 next step */
.next-band{background:var(--brand);color:#F7F5F0;padding:44px 0}
.next-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.next-inner h2{font-size:clamp(19px,2.2vw,24px);line-height:1.4;margin-bottom:6px;font-weight:700}
.next-inner p{font-size:14px;color:rgba(247,245,240,.78);margin:0;max-width:56ch}
.next-actions{display:flex;flex-wrap:wrap;gap:12px}
/* download strip */
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.dl-card{min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;display:flex;flex-direction:column;gap:10px;transition:transform .18s,border-color .18s,box-shadow .18s}
.dl-card:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:var(--shadow-card)}
.dl-card.primary{background:var(--dark);border-color:var(--dark);color:#F7F5F0}
.dl-card.primary .dl-desc{color:rgba(247,245,240,.72)}
.dl-icon{width:38px;height:38px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;background:var(--bg-alt);color:var(--brand);font-size:17px}
.dl-card.primary .dl-icon{background:rgba(247,245,240,.14);color:var(--accent-soft)}
.dl-card h3{font-size:16px;font-weight:600}
.dl-desc{font-size:13px;line-height:1.75;color:var(--muted);margin:0}
.dl-status{font-size:12px;color:var(--faint);margin-top:2px}
.dl-card.primary .dl-status{color:rgba(247,245,240,.6)}
.dl-foot{font-size:12px;color:var(--muted);margin-top:20px}
/* risk */
.risk-band{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:32px 0}
.risk-inner{display:flex;gap:16px;align-items:flex-start}
.risk-bar{flex:0 0 3px;width:3px;align-self:stretch;background:var(--warn);border-radius:2px}
.risk-inner h2{font-size:14px;font-weight:600;color:var(--warn);margin-bottom:6px}
.risk-inner p{font-size:13px;line-height:1.8;color:var(--muted);margin:0;max-width:88ch}
/* footer */
.site-footer{background:var(--dark);color:rgba(247,245,240,.8);padding:56px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:36px;padding-bottom:32px;border-bottom:1px solid rgba(247,245,240,.12)}
.footer-brand .brand-name{color:#F7F5F0;display:block}
.footer-brand .brand-sub{color:rgba(247,245,240,.55);display:block}
.footer-brand p{font-size:13px;line-height:1.8;color:rgba(247,245,240,.62);margin-top:14px;max-width:36ch}
.footer-col h4{font-size:13px;font-weight:600;color:#F7F5F0;margin-bottom:14px;letter-spacing:.06em}
.footer-col ul li{margin-bottom:9px}
.footer-col ul li a{font-size:13.5px;color:rgba(247,245,240,.7);transition:color .18s}
.footer-col ul li a:hover{color:var(--accent-soft)}
.footer-col p{font-size:13px;line-height:1.8;color:rgba(247,245,240,.6);margin:0}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;padding-top:20px;font-size:12.5px;color:rgba(247,245,240,.5)}
/* responsive */
@media (max-width:1024px){
  .main-nav{display:none}
  .nav-actions{display:none}
  .nav-toggle{display:flex}
  .hero-grid{grid-template-columns:1fr}
  .page-head-grid{grid-template-columns:1fr;align-items:start}
  .head-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .check-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{padding:64px 0}
}
@media (max-width:768px){
  .topic-grid,.myth-grid,.read-grid,.dl-grid{grid-template-columns:1fr}
  .dict-row{grid-template-columns:1fr;gap:4px}
  .next-inner{flex-direction:column;align-items:flex-start}
  .next-actions{width:100%}
  .next-actions .btn{flex:1 1 auto}
  .page-head{padding:32px 0 36px}
  .section{padding:52px 0}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .head-stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .topic-card,.dl-card{padding:18px}
  .btn{width:100%}
  .next-actions .btn{width:100%}
  .read-item time{display:none}
}

/* roulang page: article */
:root{
  --brand:#0F4A3C;--brand-dark:#0A3229;--accent:#C08A3E;--accent-soft:#E8D3AE;
  --bg:#F7F5F0;--bg-alt:#EEF1EC;--dark:#10201C;
  --ink:#1C2B27;--muted:#566661;--faint:#8A9993;--line:#DCD9D0;--warn:#B4453A;
  --radius-card:14px;--radius-btn:10px;
  --shadow-card:0 1px 2px rgba(16,32,28,.06),0 10px 26px -16px rgba(16,32,28,.28);
  --font-base:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-base);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:0;list-style:none}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
[id]{scroll-margin-top:132px}
.site-container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.num{font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:var(--radius-btn);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn-primary{background:var(--brand);color:#F7F5F0;box-shadow:0 1px 2px rgba(16,32,28,.12)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--bg-alt)}
.btn-light{background:#F7F5F0;color:var(--brand);border-color:#F7F5F0}
.btn-light:hover{background:#fff;transform:translateY(-1px)}
.btn-outline-light{background:transparent;border-color:rgba(247,245,240,.5);color:#F7F5F0}
.btn-outline-light:hover{background:rgba(247,245,240,.12)}
.btn-block{width:100%}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);border-bottom:1px solid rgba(15,74,60,.3);padding-bottom:1px;transition:color .18s,border-color .18s}
.text-link:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(247,245,240,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;flex-direction:column;justify-content:center;line-height:1.2;flex:0 0 auto;min-width:0}
.brand-name{font-size:17px;font-weight:700;color:var(--brand);letter-spacing:-.01em;white-space:nowrap}
.brand-sub{font-size:11px;color:var(--faint);letter-spacing:.05em;margin-top:3px;font-weight:400;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:auto}
.main-nav a{position:relative;font-size:15px;color:var(--muted);padding:6px 0;transition:color .18s}
.main-nav a:hover,.main-nav a.active{color:var(--brand)}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;border-radius:2px;background:var(--accent)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-actions .btn{min-height:40px;padding:0 16px;font-size:14px}
.nav-toggle{display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--brand);align-items:center;justify-content:center;cursor:pointer}
.nav-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mobile-nav{display:none;border-top:1px solid var(--line);background:var(--bg);padding:12px 20px 20px}
.mobile-nav.is-open{display:block}
.mobile-nav a{display:block;padding:12px 4px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-nav a:hover{color:var(--brand)}
.mobile-nav .btn{margin-top:16px;border-bottom:none;color:#F7F5F0}

/* ---------- 进度步骤条 ---------- */
.progress-strip{background:var(--bg-alt);border-bottom:1px solid var(--line)}
.progress-inner{display:flex;align-items:center;height:56px;overflow-x:auto;scrollbar-width:none}
.progress-inner::-webkit-scrollbar{display:none}
.step-item{display:flex;align-items:center;gap:8px;flex:0 0 auto;padding:0 14px;font-size:13px;color:var(--muted);white-space:nowrap;transition:color .18s}
.step-item:first-child{padding-left:0}
.step-item:hover{color:var(--brand)}
.step-item:hover .step-num{border-color:var(--accent);color:var(--accent)}
.step-item.is-active{color:var(--brand);font-weight:600}
.step-item.is-active .step-num{background:var(--accent);border-color:var(--accent);color:#fff}
.step-num{width:24px;height:24px;border-radius:50%;border:1px solid var(--line);background:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:var(--muted);transition:background-color .18s,border-color .18s,color .18s}
.step-divider{flex:0 0 32px;height:1px;background:rgba(192,138,62,.4)}

/* ---------- 通用 section ---------- */
.section{padding:88px 0}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:38px}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--accent);margin-bottom:12px}
.section-title{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;margin-bottom:12px}
.section-desc{color:var(--muted);font-size:15px;line-height:1.85;margin:0;max-width:72ch}

/* ---------- 文章页头 ---------- */
.article-hero{background:var(--bg-alt);border-bottom:1px solid var(--line);padding:34px 0 44px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px}
.breadcrumb a{color:var(--muted);border-bottom:1px solid transparent;transition:color .18s,border-color .18s}
.breadcrumb a:hover{color:var(--brand);border-color:var(--accent)}
.breadcrumb .sep{color:var(--faint)}
.breadcrumb .current{display:inline-block;max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink);vertical-align:bottom}
.article-title{font-size:clamp(26px,3.4vw,36px);line-height:1.3;font-weight:700;letter-spacing:-.01em;max-width:56ch;margin-bottom:16px;overflow-wrap:break-word}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;font-size:12.5px;color:var(--muted)}
.article-meta span{display:inline-flex;align-items:center;gap:6px;min-width:0}
.article-meta .dot{width:1px;height:12px;background:var(--line);display:inline-block}
.article-meta .tag{background:var(--accent-soft);color:#5A3E15;border-radius:6px;padding:2px 8px;font-size:12px;font-weight:600}

/* ---------- 文章正文布局 ---------- */
.article-wrap{padding:56px 0 72px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:48px;align-items:start}
.article-main{min-width:0}
.article-updated{font-size:12px;color:var(--faint);margin-bottom:18px}
.article-content{max-width:760px;min-width:0;overflow-wrap:break-word;font-size:16px;line-height:1.85;color:var(--ink)}
.article-content p{margin:0 0 1.1em}
.article-content h2{font-size:22px;line-height:1.5;font-weight:700;margin:32px 0 16px;padding-left:12px;border-left:3px solid var(--accent);color:var(--ink)}
.article-content h3{font-size:19px;line-height:1.45;font-weight:700;margin:24px 0 12px;color:var(--ink)}
.article-content h4{font-size:16px;font-weight:700;margin:20px 0 10px}
.article-content ul{list-style:disc;padding-left:1.4em;margin:0 0 1.1em}
.article-content ol{list-style:decimal;padding-left:1.4em;margin:0 0 1.1em}
.article-content li{margin-bottom:8px;line-height:1.8}
.article-content strong{font-weight:700}
.article-content blockquote{margin:0 0 1.2em;padding:16px 18px;border-left:3px solid var(--accent);background:rgba(232,211,174,.18);border-radius:0 10px 10px 0;color:var(--muted);font-size:15px}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{border-radius:10px;border:1px solid var(--line);margin:0 0 1.1em;max-width:100%;height:auto}
.article-content a{color:var(--brand);border-bottom:1px solid rgba(15,74,60,.3)}
.article-content a:hover{color:var(--accent);border-color:var(--accent)}
.article-content table{width:100%;border-collapse:collapse;font-size:14px;margin:0 0 1.2em;border:1px solid var(--line);display:block;overflow-x:auto;max-width:100%}
.article-content th{background:var(--brand);color:#F7F5F0;font-weight:600;padding:10px 12px;text-align:left;font-size:14px;white-space:nowrap}
.article-content td{padding:10px 12px;border-top:1px solid var(--line);vertical-align:top}
.article-content tbody tr:nth-child(even) td{background:var(--bg)}
.article-content pre{background:var(--bg-alt);border:1px solid var(--line);border-radius:10px;padding:14px 16px;overflow-x:auto;margin:0 0 1.2em;font-size:14px;line-height:1.7}
.article-content code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;background:var(--bg-alt);padding:2px 6px;border-radius:6px}
.article-content pre code{background:none;padding:0}
.article-empty{max-width:640px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:32px}
.article-empty h2{font-size:20px;font-weight:700;margin-bottom:10px}
.article-empty p{color:var(--muted);font-size:14.5px;margin-bottom:20px}

/* ---------- 侧栏 ---------- */
.article-side{min-width:0}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:22px;margin-bottom:20px}
.side-card h2{font-size:15px;font-weight:700;color:var(--brand);margin-bottom:12px}
.side-list li{position:relative;padding:10px 0 10px 16px;font-size:13.5px;line-height:1.75;color:var(--muted);border-bottom:1px dashed var(--line)}
.side-list li:last-child{border-bottom:none;padding-bottom:0}
.side-list li::before{content:"";position:absolute;left:0;top:19px;width:6px;height:6px;border-radius:2px;background:var(--accent)}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 0;font-size:13.5px;font-weight:600;color:var(--brand);border-bottom:1px dashed var(--line);transition:color .18s}
.side-links a:last-child{border-bottom:none;padding-bottom:0}
.side-links a:hover{color:var(--accent)}
.side-links .arrow{color:var(--accent);font-weight:700}

/* ---------- 风险提示条 ---------- */
.risk-section{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:44px 0}
.risk-panel{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-left:3px solid var(--warn);border-radius:0 12px 12px 0;padding:20px 22px}
.risk-panel h2{font-size:14px;font-weight:600;color:var(--warn);margin-bottom:6px;letter-spacing:.02em}
.risk-panel p{font-size:13px;line-height:1.85;color:var(--muted);margin:0;max-width:80ch}

/* ---------- 下载区 ---------- */
.download-section{padding:72px 0;background:var(--dark);color:#F7F5F0}
.download-section .eyebrow{color:var(--accent-soft)}
.download-section .section-title{color:#F7F5F0}
.download-section .section-desc{color:rgba(247,245,240,.66)}
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;align-items:stretch}
.dl-card{display:flex;flex-direction:column;gap:12px;border-radius:var(--radius-card);padding:24px;min-width:0;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.dl-card:hover{transform:translateY(-2px)}
.dl-card--light{background:#F7F5F0;border:1px solid #F7F5F0;color:var(--ink);box-shadow:0 14px 30px -20px rgba(0,0,0,.6)}
.dl-card--light:hover{border-color:var(--accent)}
.dl-card--dark{background:rgba(247,245,240,.05);border:1px solid rgba(247,245,240,.16);color:#F7F5F0}
.dl-card--dark:hover{border-color:var(--accent)}
.dl-head{display:flex;align-items:center;gap:12px;min-width:0}
.dl-icon{flex:0 0 auto;width:40px;height:40px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;letter-spacing:.02em}
.dl-card--light .dl-icon{background:var(--brand);color:#F7F5F0}
.dl-card--dark .dl-icon{background:rgba(247,245,240,.14);color:var(--accent-soft)}
.dl-card h3{font-size:17px;font-weight:700;line-height:1.4}
.dl-card .dl-desc{font-size:13px;line-height:1.8;margin:0}
.dl-card--light .dl-desc{color:var(--muted)}
.dl-card--dark .dl-desc{color:rgba(247,245,240,.68)}
.dl-card .dl-file{font-size:12px;letter-spacing:.02em}
.dl-card--light .dl-file{color:var(--faint)}
.dl-card--dark .dl-file{color:rgba(247,245,240,.5)}
.dl-card .btn{margin-top:auto}
.dl-note{font-size:12px;line-height:1.7;margin-top:22px;color:rgba(247,245,240,.5)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;font-size:16px;font-weight:600;color:var(--ink);transition:color .18s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-size:14px;color:var(--brand);transition:background-color .18s,border-color .18s,color .18s}
.faq-icon::after{content:"+"}
.faq-item[open] .faq-icon{background:var(--accent);border-color:var(--accent);color:#fff}
.faq-item[open] .faq-icon::after{content:"−"}
.faq-body{padding:0 0 20px;font-size:14.5px;line-height:1.85;color:var(--muted);max-width:72ch}

/* ---------- 下一步条 ---------- */
.next-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;background:var(--brand);color:#F7F5F0;border-radius:var(--radius-card);padding:28px 30px}
.next-bar p{font-size:15px;line-height:1.8;max-width:46ch;margin:0;color:rgba(247,245,240,.82)}
.next-bar .next-title{display:block;font-size:18px;font-weight:700;color:#F7F5F0;margin-bottom:6px}
.next-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(247,245,240,.7);padding:56px 0 26px;border-top:1px solid rgba(255,255,255,.06)}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.5fr);gap:32px}
.footer-brand{min-width:0}
.footer-brand .brand-name{display:block;font-size:18px;font-weight:700;color:#F7F5F0;letter-spacing:-.01em}
.footer-brand .brand-sub{display:block;font-size:11px;color:var(--accent-soft);letter-spacing:.08em;margin-top:4px}
.footer-brand p{font-size:13px;line-height:1.85;color:rgba(247,245,240,.6);margin-top:14px;max-width:36ch}
.footer-col{min-width:0}
.footer-col h4{font-size:14px;font-weight:600;color:#F7F5F0;margin-bottom:14px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:13.5px;color:rgba(247,245,240,.72);transition:color .18s}
.footer-col a:hover{color:var(--accent-soft)}
.footer-col p{font-size:13px;line-height:1.85;color:rgba(247,245,240,.6)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:20px;font-size:12.5px;color:rgba(247,245,240,.46)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-inner{gap:16px}
  .main-nav{gap:16px}
  .nav-actions .btn-ghost{display:none}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px}
  .article-content{max-width:none}
  .article-side{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .side-card{margin-bottom:0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .download-grid{grid-template-columns:minmax(0,1fr)}
  .section{padding:64px 0}
}
@media (max-width:768px){
  .main-nav,.nav-actions{display:none}
  .nav-toggle{display:inline-flex}
  .article-hero{padding:26px 0 34px}
  .article-wrap{padding:40px 0 56px}
  .breadcrumb .current{max-width:100%;white-space:normal}
  .article-side{grid-template-columns:minmax(0,1fr)}
  .risk-panel{flex-direction:column;gap:8px}
  .next-bar{padding:24px}
  .section{padding:56px 0}
  .download-section{padding:56px 0}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  body{font-size:15.5px}
  .brand-name{font-size:15.5px}
  .brand-sub{font-size:10.5px}
  .article-title{font-size:24px;line-height:1.35}
  .section-title{font-size:21px}
  .article-content h2{font-size:19px}
  .article-content h3{font-size:17px}
  .faq-item summary{font-size:15px}
  .next-actions{width:100%}
  .next-actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .dl-card{padding:20px}
}