/* roulang page: index */
:root{
  --c-brand-900:#12241E;
  --c-brand-700:#1E3A32;
  --c-brand-500:#33604F;
  --c-brand-100:#E7EFEA;
  --c-accent-600:#B2453D;
  --c-accent-500:#C4574A;
  --c-accent-100:#F7E7E3;
  --c-brass:#A98A4B;
  --c-paper:#F7F3EB;
  --c-surface:#FFFFFF;
  --c-surface-2:#FCFAF6;
  --c-line:#E3DACB;
  --t-1:#16211C;
  --t-2:#4A574F;
  --t-3:#7C877F;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,36,30,.05);
  --sh-2:0 2px 4px rgba(18,36,30,.06),0 12px 28px -14px rgba(18,36,30,.18);
  --sh-3:0 18px 40px -18px rgba(18,36,30,.28);
  --container:1200px;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html body{
  margin:0;padding:0;
  font-family:var(--font-sans);
  font-size:17px;line-height:1.9;
  color:var(--t-1);
  background:var(--c-paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .18s ease}
button,input,textarea{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.serif{font-family:var(--font-serif)}
section{position:relative}

/* ---------- 通用区块 ---------- */
.section{padding:88px 0}
.section-alt{background:var(--c-surface-2);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;color:var(--c-brass);text-transform:uppercase;margin-bottom:12px}
h2{font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);line-height:1.3;letter-spacing:-.01em;color:var(--c-brand-900);font-weight:700}
.sec-desc{margin-top:12px;max-width:640px;font-size:15px;line-height:1.8;color:var(--t-2)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;color:var(--c-accent-600);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;white-space:nowrap}
.link-more:hover{color:#8E332C;text-decoration-thickness:2px}
.link-more svg{transition:transform .18s ease}
.link-more:hover svg{transform:translateX(2px)}

/* ---------- 顶部导航 ---------- */
.site-head{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--c-line);transition:box-shadow .2s ease}
.site-head.is-stuck{box-shadow:var(--sh-2)}
.brand-row{display:flex;align-items:center;gap:20px;height:56px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{width:26px;height:26px;flex:none}
.logo-text{font-size:18px;font-weight:700;letter-spacing:.04em;color:var(--c-brand-900);white-space:nowrap}
.brand-tools{display:flex;align-items:center;gap:16px;margin-left:auto}
.search{display:flex;align-items:center;gap:8px;height:38px;width:220px;padding:0 14px;border:1px solid var(--c-line);border-radius:var(--r-pill);background:var(--c-surface-2);transition:border-color .18s ease,box-shadow .18s ease}
.search:focus-within{border-color:var(--c-brand-500);box-shadow:0 0 0 3px rgba(51,96,79,.12);background:#fff}
.search svg{flex:none;color:var(--t-3)}
.search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--t-1)}
.search input::placeholder{color:var(--t-3)}
.link-line{font-size:15px;color:var(--t-2)}
.link-line:hover{color:var(--c-accent-600)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border:0;border-radius:var(--r-btn);font-size:16px;font-weight:600;cursor:pointer;transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,filter .18s ease;white-space:nowrap}
.btn-primary{background:var(--c-accent-600);color:#fff}
.btn-primary:hover{background:var(--c-accent-500);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:transparent;color:var(--c-brand-700);border:1.5px solid var(--c-brand-700)}
.btn-ghost:hover{background:var(--c-brand-700);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0);filter:brightness(.97)}
.btn:focus-visible{outline:2px solid var(--c-brass);outline-offset:2px}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:8px}
.chan-row{display:flex;align-items:center;gap:16px;height:46px;border-top:1px solid var(--c-line)}
.chan-list{display:flex;align-items:center;gap:2px;flex:none}
.chan{position:relative;display:inline-flex;align-items:center;height:46px;padding:0 16px;font-size:15px;color:var(--t-2)}
.chan::after{content:"";position:absolute;left:16px;right:16px;bottom:0;height:2px;background:var(--c-accent-600);transform:scaleX(0);transition:transform .18s ease}
.chan:hover{color:var(--c-brand-700)}
.chan:hover::after{transform:scaleX(1)}
.chan.is-active{color:var(--c-brand-900);font-weight:700}
.chan.is-active::after{transform:scaleX(1)}
.hot-list{display:flex;align-items:center;gap:8px;margin-left:auto;overflow:hidden;position:relative;padding-left:24px}
.hot-list::before{content:"";position:absolute;left:0;top:0;bottom:0;width:24px;background:linear-gradient(90deg,#fff,rgba(255,255,255,0));pointer-events:none}
.hot-pill{display:inline-flex;align-items:center;height:26px;padding:0 12px;border:1px solid var(--c-line);border-radius:var(--r-pill);font-size:13px;color:var(--t-3);white-space:nowrap;background:var(--c-surface-2);transition:all .18s ease}
.hot-pill:hover{color:var(--c-brand-500);border-color:var(--c-brand-100);background:var(--c-brand-100)}
.nav-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--c-line);border-radius:8px;background:#fff;color:var(--c-brand-700);cursor:pointer}
.nav-toggle:focus-visible{outline:2px solid var(--c-brass);outline-offset:2px}
.mobile-drawer{display:none;background:#fff;border-top:1px solid var(--c-line);padding:16px 24px 26px}
.mobile-drawer.is-open{display:block}
.drawer-search{display:flex;align-items:center;gap:8px;height:44px;padding:0 14px;border:1px solid var(--c-line);border-radius:var(--r-pill);background:var(--c-surface-2);margin-bottom:14px}
.drawer-search input{border:0;outline:0;background:transparent;width:100%;font-size:15px}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--c-line)}
.drawer-nav a{padding:14px 2px;font-size:16px;border-bottom:1px solid var(--c-line);color:var(--t-1)}
.drawer-nav a.is-active{color:var(--c-brand-900);font-weight:700;box-shadow:inset 3px 0 0 var(--c-accent-600);padding-left:12px}
.drawer-cta{margin-top:18px;display:flex;gap:12px}
.drawer-cta .btn{flex:1}
body.no-scroll{overflow:hidden}

/* ---------- Hero ---------- */
.hero{padding:70px 0 76px;background:var(--c-paper);overflow:hidden}
.hero::before{content:"";position:absolute;right:-140px;top:-160px;width:640px;height:640px;border-radius:50%;background-image:radial-gradient(circle,rgba(51,96,79,.08) 1px,transparent 1px);background-size:26px 26px;pointer-events:none;opacity:.7}
.hero::after{content:"";position:absolute;left:-120px;bottom:-180px;width:480px;height:480px;border-radius:50%;background-image:radial-gradient(circle,rgba(169,138,75,.10) 1px,transparent 1px);background-size:22px 22px;pointer-events:none;opacity:.6}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);background:var(--c-brand-100);color:var(--c-brand-700);font-size:13px;letter-spacing:.02em;margin-bottom:22px}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--c-brass);display:inline-block}
.hero h1{font-family:var(--font-serif);font-size:clamp(28px,4.2vw,44px);line-height:1.25;letter-spacing:-.01em;font-weight:700;color:var(--c-brand-900);margin-bottom:20px}
.hero-sub{font-size:17px;line-height:1.9;color:var(--t-2);max-width:560px;margin-bottom:34px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.metrics{display:flex;flex-wrap:wrap;margin-top:38px;padding-top:24px;border-top:1px solid var(--c-brass)}
.metric{flex:1 1 0;min-width:118px;padding-right:20px}
.metric-num{font-family:var(--font-serif);font-size:30px;line-height:1.2;color:var(--c-brand-700)}
.metric-label{font-size:13px;color:var(--t-3);margin-top:2px}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:18px;border:1px solid var(--c-line);box-shadow:var(--sh-2)}
.hero-mini{position:absolute;right:-14px;bottom:-20px;display:flex;align-items:center;gap:12px;min-width:216px;padding:14px 18px;background:#fff;border:1px solid var(--c-line);border-radius:12px;box-shadow:var(--sh-2)}
.hero-mini i{width:8px;height:8px;border-radius:50%;background:var(--c-accent-600);flex:none}
.hero-mini strong{display:block;font-size:14px;color:var(--c-brand-900)}
.hero-mini span{display:block;font-size:12px;color:var(--t-3)}

/* ---------- 价值主张条 ---------- */
.value-bar{background:var(--c-paper);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.value-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.value-item{display:flex;gap:14px;align-items:flex-start;padding:30px 26px;border-right:1px solid var(--c-line)}
.value-item:last-child{border-right:0}
.value-item svg{flex:none;color:var(--c-brand-500);margin-top:4px}
.value-item strong{display:block;font-size:15px;color:var(--c-brand-900);margin-bottom:2px}
.value-item span{font-size:13px;line-height:1.7;color:var(--t-3)}

/* ---------- 功能分组：1 宽 + 2 窄 交错 ---------- */
.fgrid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.fcard{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:30px;display:flex;flex-direction:column;gap:14px;transition:border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out}
.fcard:hover{border-color:var(--c-accent-100);box-shadow:var(--sh-2);transform:translateY(-2px)}
.fcard-wide{grid-column:span 8}
.fcard-narrow{grid-column:span 4}
.fcard-row{display:flex;gap:28px;align-items:flex-start}
.fcard-row img{width:210px;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-card);border:1px solid var(--c-line);flex:none}
.ficon{width:40px;height:40px;border-radius:10px;background:var(--c-brand-100);display:flex;align-items:center;justify-content:center;color:var(--c-brand-500);flex:none}
.fcard h3{font-size:19px;line-height:1.45;font-weight:700;color:var(--c-brand-900)}
.fcard p{font-size:15px;line-height:1.85;color:var(--t-2)}
.fcard .link-more{margin-top:auto;font-size:14px}

/* ---------- 使用场景 ---------- */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:60px}
.scene:last-child{margin-bottom:0}
.scene.reverse .scene-media{order:2}
.scene.reverse .scene-body{order:1}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:14px;border:1px solid var(--c-line);box-shadow:var(--sh-1)}
.scene-body h3{font-family:var(--font-serif);font-size:22px;line-height:1.4;color:var(--c-brand-900);margin-bottom:12px}
.scene-body p{font-size:16px;line-height:1.85;color:var(--t-2);margin-bottom:16px}
.point{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--t-2);line-height:1.8;margin-bottom:8px}
.point i{width:6px;height:6px;border-radius:50%;background:var(--c-brass);flex:none;margin-top:11px}

/* ---------- 反馈与证据 ---------- */
.case-grid{display:grid;grid-template-columns:8fr 4fr;gap:24px;align-items:stretch}
.case-main{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:28px;display:grid;grid-template-columns:5fr 7fr;gap:28px;align-items:center}
.case-main img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);border:1px solid var(--c-line)}
.case-main h3{font-size:20px;color:var(--c-brand-900);margin-bottom:14px;line-height:1.45}
.case-figures{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px;padding-top:16px;border-top:1px solid var(--c-line)}
.case-fig{font-size:13px;color:var(--t-3);display:flex;align-items:center;gap:8px}
.case-fig b{font-family:var(--font-serif);font-size:20px;color:var(--c-brand-700);font-weight:700}
.case-fig + .case-fig::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--c-brass);margin-right:4px}
.case-side{display:flex;flex-direction:column;gap:24px}
.case-mini{flex:1;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:22px;display:flex;flex-direction:column;gap:10px;transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}
.case-mini:hover{border-color:var(--c-accent-100);box-shadow:var(--sh-2);transform:translateY(-2px)}
.case-mini h4{font-size:16px;font-weight:700;color:var(--c-brand-900)}
.case-mini p{font-size:14px;line-height:1.8;color:var(--t-2)}

/* ---------- 方案与价格 ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.plan{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:32px 28px;display:flex;flex-direction:column}
.plan.is-featured{border-top:3px solid var(--c-accent-600);transform:translateY(-12px);box-shadow:var(--sh-3);position:relative}
.plan-badge{position:absolute;top:-13px;right:22px;height:26px;padding:0 14px;display:inline-flex;align-items:center;border-radius:var(--r-pill);background:var(--c-accent-600);color:#fff;font-size:12px;letter-spacing:.04em}
.plan-name{font-size:15px;color:var(--t-3);margin-bottom:10px}
.plan-price{font-family:var(--font-serif);font-size:34px;line-height:1.2;color:var(--c-brand-900);margin-bottom:8px}
.plan-note{font-size:14px;line-height:1.8;color:var(--t-2);padding-bottom:20px;border-bottom:1px solid var(--c-line);margin-bottom:20px}
.plan-list{display:flex;flex-direction:column;gap:12px;margin-bottom:28px}
.plan-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--t-2);line-height:1.7}
.plan-list svg{flex:none;margin-top:5px;color:var(--c-brass)}
.plan .btn{width:100%;margin-top:auto}
.plan-foot{margin-top:26px;text-align:center;font-size:14px;color:var(--t-3)}
.plan-foot a{color:var(--c-accent-600);text-decoration:underline;text-underline-offset:4px}
.plan-foot a:hover{color:#8E332C}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 44px}
.news-item{display:flex;gap:18px;padding:22px 0;border-bottom:1px dashed var(--c-line);transition:background .18s ease}
.news-item:hover{background:var(--c-surface-2)}
.news-item:hover .news-title{color:var(--c-accent-600)}
.news-date{flex:none;width:88px;font-family:var(--font-serif);font-size:13px;color:var(--c-brass);padding-left:12px;border-left:2px solid var(--c-accent-600);line-height:1.7;letter-spacing:.02em}
.news-body{flex:1;min-width:0}
.news-pill{display:inline-flex;align-items:center;height:24px;padding:0 10px;border:1px solid var(--c-line);border-radius:var(--r-pill);font-size:12px;color:var(--c-brand-500);margin-bottom:8px}
.news-title{display:block;font-size:17px;font-weight:700;line-height:1.55;color:var(--c-brand-900);margin-bottom:6px;transition:color .18s ease;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-summary{font-size:15px;line-height:1.75;color:var(--t-3);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-empty{border:1px dashed var(--c-line);background:var(--c-surface-2);border-radius:var(--r-card);padding:34px 28px;display:flex;flex-direction:column;gap:10px}
.news-empty strong{font-size:16px;color:var(--c-brand-900)}
.news-empty span{font-size:14px;color:var(--t-3)}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 48px}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-q{width:100%;display:flex;align-items:center;gap:14px;padding:20px 12px;background:none;border:0;cursor:pointer;text-align:left;font-size:16px;font-weight:500;color:var(--t-1);line-height:1.6;transition:background .18s ease,color .18s ease}
.faq-q:hover{background:var(--c-surface-2)}
.faq-q:focus-visible{outline:2px solid var(--c-brass);outline-offset:-2px}
.faq-num{font-family:var(--font-serif);font-size:12px;color:var(--c-brass);flex:none;letter-spacing:.06em;width:22px}
.faq-icon{margin-left:auto;flex:none;color:var(--c-brand-500);transition:transform .22s ease}
.faq-item.is-open .faq-icon{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 12px 20px 48px;font-size:15px;line-height:1.85;color:var(--t-2)}
.faq-item.is-open{background:var(--c-surface-2)}

/* ---------- 底部 CTA ---------- */
.cta-wrap{background:var(--c-brand-900);color:#E7EFEA;position:relative;overflow:hidden}
.cta-wrap::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.16}
.cta-grid{position:relative;display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start;padding:80px 0}
.cta-grid h2{color:#fff}
.cta-grid .kicker{color:var(--c-brass)}
.cta-lead{font-size:16px;line-height:1.9;color:rgba(231,239,234,.78);margin-top:16px;max-width:420px}
.cta-points{display:flex;flex-direction:column;gap:10px;margin-top:26px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:rgba(231,239,234,.86)}
.cta-points svg{flex:none;margin-top:5px;color:var(--c-brass)}
.form-card{background:#fff;border-radius:var(--r-card);padding:32px;box-shadow:var(--sh-3)}
.form-row{margin-bottom:18px}
.form-row label{display:block;font-size:14px;color:var(--t-2);margin-bottom:8px}
.form-row input,.form-row textarea{width:100%;border:1px solid var(--c-line);border-radius:10px;background:#fff;padding:0 16px;height:48px;font-size:15px;color:var(--t-1);outline:0;transition:border-color .18s ease,box-shadow .18s ease}
.form-row textarea{height:112px;padding:14px 16px;line-height:1.7;resize:vertical}
.form-row input:focus,.form-row textarea:focus{border-color:var(--c-brand-500);box-shadow:0 0 0 3px rgba(51,96,79,.12)}
.form-row input::placeholder,.form-row textarea::placeholder{color:#9AA69F}
.form-hint{font-size:13px;color:var(--t-3);line-height:1.7;margin-top:14px}
.form-card .btn{width:100%}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--c-brand-900);color:#E7EFEA;padding:64px 0 0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:0}
.foot-col{padding:0 28px;border-right:1px solid rgba(255,255,255,.12)}
.foot-col:first-child{padding-left:0}
.foot-col:last-child{border-right:0;padding-right:0}
.foot-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px}
.foot-brand .logo-text{color:#fff}
.foot-intro{font-size:14px;line-height:1.9;color:rgba(231,239,234,.72);margin-bottom:18px}
.foot-contact{display:flex;flex-direction:column;gap:8px;font-size:14px;color:rgba(231,239,234,.72)}
.foot-contact a:hover{color:var(--c-brass)}
.foot-title{font-size:14px;letter-spacing:.06em;color:#fff;margin-bottom:16px;font-weight:700}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-links a{font-size:14px;color:rgba(231,239,234,.72);line-height:1.7}
.foot-links a:hover{color:var(--c-accent-500)}
.foot-bar{margin-top:56px;border-top:1px solid rgba(255,255,255,.12);padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(231,239,234,.6)}
.foot-bar a{color:rgba(231,239,234,.6)}
.foot-bar a:hover{color:var(--c-brass)}

/* ---------- 回到顶部 ---------- */
.to-top{position:fixed;right:24px;bottom:28px;width:52px;height:52px;border-radius:50%;background:#fff;border:1px solid var(--c-line);box-shadow:var(--sh-2);display:flex;align-items:center;justify-content:center;color:var(--c-brand-700);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .22s ease;z-index:70}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--c-accent-100);color:var(--c-accent-600)}
.to-top:focus-visible{outline:2px solid var(--c-brass);outline-offset:2px}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero-grid{gap:40px}
}
@media (max-width:1023px){
  .hot-list{display:none}
  .search{width:180px}
  .hero{padding:54px 0 60px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-media img{aspect-ratio:16/10}
  .value-grid{grid-template-columns:1fr 1fr}
  .value-item:nth-child(2){border-right:0}
  .value-item:nth-child(1),.value-item:nth-child(2){border-bottom:1px solid var(--c-line)}
  .fgrid{grid-template-columns:1fr}
  .fcard-wide,.fcard-narrow{grid-column:span 1}
  .scene{grid-template-columns:1fr;gap:28px;margin-bottom:48px}
  .scene.reverse .scene-media,.scene.reverse .scene-body{order:0}
  .case-grid{grid-template-columns:1fr}
  .case-main{grid-template-columns:1fr;gap:20px}
  .case-side{flex-direction:row}
  .plan-grid{grid-template-columns:1fr;gap:20px}
  .plan.is-featured{transform:none;margin-top:8px}
  .news-grid{grid-template-columns:1fr;gap:0}
  .faq-grid{grid-template-columns:1fr;gap:0}
  .cta-grid{grid-template-columns:1fr;gap:36px;padding:64px 0}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px 0}
  .foot-col{border-right:0;padding:0}
  .foot-col:nth-child(odd){padding-right:20px}
}
@media (max-width:767px){
  html body{font-size:16px}
  .section{padding:56px 0}
  .wrap{padding:0 18px}
  .brand-row{height:56px;gap:12px}
  .logo-text{font-size:16px}
  .search{display:none}
  .link-line{display:none}
  .brand-tools .btn-sm{display:none}
  .nav-toggle{display:flex}
  .chan-row{height:auto;padding:8px 0;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .chan-row::-webkit-scrollbar{display:none}
  .chan{height:38px;padding:0 12px;white-space:nowrap}
  .chan::after{left:12px;right:12px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:30px}
  .hero h1{font-size:clamp(26px,7.4vw,34px)}
  .hero-sub{font-size:16px;margin-bottom:26px}
  .hero-actions .btn{width:100%}
  .metrics{border-top:1px solid var(--c-brass)}
  .metric{flex:1 1 46%;padding:12px 12px 0 0}
  .hero-mini{position:static;margin-top:14px;right:auto;bottom:auto;width:100%}
  .value-grid{grid-template-columns:1fr}
  .value-item{border-right:0;border-bottom:1px solid var(--c-line);padding:22px 20px}
  .value-item:last-child{border-bottom:0}
  .fcard-row{flex-direction:column;gap:18px}
  .fcard-row img{width:100%}
  .case-side{flex-direction:column}
  .news-date{width:76px}
  .faq-a p{padding-left:36px}
  .form-card{padding:22px}
  .foot-grid{grid-template-columns:1fr;gap:0}
  .foot-col{padding:22px 0;border-bottom:1px solid rgba(255,255,255,.12)}
  .foot-col:nth-child(odd){padding-right:0}
  .foot-col:last-child{border-bottom:0}
  .foot-bar{justify-content:flex-start;margin-top:8px}
  .to-top{right:16px;bottom:18px;width:46px;height:46px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --c-brand-900:#12241E;
  --c-brand-700:#1E3A32;
  --c-brand-500:#33604F;
  --c-brand-100:#E7EFEA;
  --c-accent-600:#B2453D;
  --c-accent-500:#C4574A;
  --c-accent-100:#F7E7E3;
  --c-brass:#A98A4B;
  --c-paper:#F7F3EB;
  --c-surface:#FFFFFF;
  --c-surface-2:#FCFAF6;
  --c-text:#16211C;
  --c-text-2:#4A574F;
  --c-text-3:#7C877F;
  --c-line:#E3DACB;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-img:14px;
  --sh-1:0 1px 2px rgba(18,36,30,.05);
  --sh-2:0 2px 4px rgba(18,36,30,.06),0 12px 28px -14px rgba(18,36,30,.18);
  --sh-3:0 18px 40px -18px rgba(18,36,30,.28);
  --gap-section:88px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--c-paper);color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;line-height:1.9;text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;letter-spacing:-.01em;line-height:1.3;color:var(--c-brand-900)}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.3em}
:focus-visible{outline:2px solid var(--c-brass);outline-offset:2px;border-radius:4px}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (prefers-reduced-motion: reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important}}

/* ---------- 按钮 / 链接 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;
  border-radius:var(--r-btn);border:1px solid transparent;font-size:16px;font-weight:600;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-accent-600);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-accent-500);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:transparent;color:var(--c-brand-700);border:1.5px solid var(--c-brand-700)}
.btn-ghost:hover{background:var(--c-brand-700);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.text-link{color:var(--c-brand-700);border-bottom:1px solid currentColor;padding-bottom:2px;font-size:15px;transition:color .18s ease,border-color .18s ease}
.text-link:hover{color:var(--c-accent-600);border-bottom-width:2px}

/* ---------- 吸顶导航 ---------- */
.site-head{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--c-line);transition:box-shadow .22s ease}
.site-head.is-scrolled{box-shadow:var(--sh-2)}
.brand-row{height:56px;display:flex;align-items:center;border-bottom:1px solid var(--c-line)}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.04em;color:var(--c-brand-900)}
.logo-mark{width:24px;height:24px;flex:none}
.brand-tools{display:flex;align-items:center;gap:18px}
.head-note{font-size:13px;color:var(--c-text-3)}
.search-box{position:relative;display:flex;align-items:center;gap:8px;width:220px;height:38px;padding:0 14px;border:1px solid var(--c-line);border-radius:var(--r-pill);background:var(--c-surface-2);transition:border-color .18s ease,box-shadow .18s ease}
.search-box:focus-within{border-color:var(--c-brand-500);box-shadow:0 0 0 3px rgba(51,96,79,.12)}
.search-box svg{width:16px;height:16px;flex:none;stroke:var(--c-text-3)}
.search-box input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px}
.menu-btn{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--c-line);border-radius:var(--r-btn);background:var(--c-surface);cursor:pointer}
.menu-btn svg{width:20px;height:20px;stroke:var(--c-brand-700)}
.chan-row{height:46px;display:flex;align-items:center;background:#fff}
.chan-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%}
.chan-list{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none}
.chan-list::-webkit-scrollbar{display:none}
.chan{position:relative;padding:0 16px;line-height:46px;font-size:15px;color:var(--c-text-2);white-space:nowrap;transition:color .18s ease}
.chan::after{content:"";position:absolute;left:16px;right:16px;bottom:0;height:2px;background:var(--c-accent-600);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.chan:hover{color:var(--c-brand-700)}
.chan:hover::after{transform:scaleX(1)}
.chan.is-active{color:var(--c-brand-900);font-weight:700}
.chan.is-active::after{transform:scaleX(1)}
.hot-tags{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);overflow:hidden}
.hot-tags span{color:var(--c-brass);letter-spacing:.08em}
.hot-tags a{padding:3px 10px;border-radius:var(--r-pill);background:var(--c-surface-2);border:1px solid var(--c-line);color:var(--c-text-2);transition:color .18s ease,border-color .18s ease}
.hot-tags a:hover{border-color:var(--c-accent-100);color:var(--c-accent-600)}
.drawer{display:none}

/* ---------- 文章深色首屏 ---------- */
.art-hero{position:relative;overflow:hidden;padding:56px 0 52px;color:#E7EFEA;background:linear-gradient(115deg,#0E1D18 0%,#12241E 48%,#1E3A32 100%)}
.art-hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.24}
.art-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 84% 16%,rgba(169,138,75,.24),transparent 56%)}
.art-hero .wrap{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(231,239,234,.62)}
.crumb a{color:rgba(231,239,234,.84);transition:color .18s ease}
.crumb a:hover{color:var(--c-brass)}
.crumb .sep{color:rgba(231,239,234,.35)}
.art-hero h1{color:#F4F1E9;font-size:clamp(26px,3.6vw,40px);line-height:1.32;max-width:920px;margin:18px 0 20px}
.art-tag{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);border:1px solid rgba(169,138,75,.55);color:var(--c-brass);font-size:12.5px;letter-spacing:.06em}
.art-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13.5px;color:rgba(231,239,234,.7)}
.art-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--c-brass)}

/* ---------- 正文布局 ---------- */
.art-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:44px;align-items:start;padding-top:56px}
.art-main{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:44px 48px}
.art-body{max-width:760px;font-size:17px;line-height:1.9}
.art-body h2{position:relative;font-size:24px;margin:2em 0 .8em;padding-left:14px}
.art-body h2::before{content:"";position:absolute;left:0;top:.3em;width:4px;height:1em;background:var(--c-accent-600);border-radius:2px}
.art-body h3{font-size:19px;margin:1.7em 0 .6em}
.art-body p{margin:0 0 1.1em}
.art-body ul{list-style:none;padding-left:1.25em;margin:0 0 1.2em}
.art-body ul li{position:relative;margin:.4em 0}
.art-body ul li::before{content:"";position:absolute;left:-1.1em;top:.78em;width:6px;height:6px;border-radius:50%;background:var(--c-brass)}
.art-body ol{padding-left:1.4em;margin:0 0 1.2em}
.art-body ol li{margin:.4em 0}
.art-body blockquote{margin:1.6em 0;padding:16px 20px;border-left:3px solid var(--c-brand-500);background:var(--c-surface-2);border-radius:0 var(--r-card) var(--r-card) 0;color:var(--c-text-2)}
.art-body img{border-radius:12px;margin:1.6em auto;box-shadow:var(--sh-1)}
.art-body figure{margin:1.6em 0}
.art-body figcaption{text-align:center;font-size:13px;color:var(--c-text-3);margin-top:8px}
.art-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;border:1px solid var(--c-line)}
.art-body th,.art-body td{padding:12px 14px;border-bottom:1px solid var(--c-line);text-align:left}
.art-body thead th{background:var(--c-brand-100);color:var(--c-brand-900);font-weight:600}
.art-body tbody tr:nth-child(even){background:var(--c-surface-2)}
.art-body a{color:var(--c-accent-600);border-bottom:1px solid rgba(178,69,61,.35)}
.art-body a:hover{border-bottom-width:2px}
.art-body code{background:var(--c-surface-2);border:1px solid var(--c-line);border-radius:6px;padding:1px 6px;font-size:14px}
.art-empty{padding:40px 0 24px;text-align:center}
.art-empty h2{padding-left:0;margin:0 0 12px}
.art-empty h2::before{display:none}
.art-empty p{color:var(--c-text-2);font-size:16px;margin-bottom:24px}
.art-tags{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:40px;padding-top:24px;border-top:1px solid var(--c-line)}
.art-tags .tag-label{font-size:13px;color:var(--c-text-3);letter-spacing:.06em}
.tag{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);border:1px solid var(--c-line);background:var(--c-surface-2);font-size:13.5px;color:var(--c-text-2);transition:color .18s ease,border-color .18s ease,background-color .18s ease}
.tag:hover{color:var(--c-accent-600);border-color:var(--c-accent-100);background:var(--c-accent-100)}

/* ---------- 侧栏 ---------- */
.art-side{position:sticky;top:118px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1)}
.side-card h3{font-size:17px;margin-bottom:12px}
.side-card p{margin:0 0 16px;font-size:14.5px;line-height:1.8;color:var(--c-text-2)}
.side-links{display:flex;flex-direction:column}
.side-links a{position:relative;display:block;padding:10px 0 10px 14px;font-size:15px;color:var(--c-text-2);border-bottom:1px dashed var(--c-line);transition:color .18s ease,padding-left .18s ease}
.side-links a:last-child{border-bottom:0}
.side-links a::before{content:"";position:absolute;left:0;top:50%;margin-top:-3px;width:6px;height:6px;border-radius:50%;background:var(--c-brass);opacity:.65}
.side-links a:hover{color:var(--c-accent-600);padding-left:18px}

/* ---------- 板块通用 ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;padding-bottom:14px;border-bottom:1px solid var(--c-line)}
.sec-head h2{font-size:clamp(22px,2.6vw,28px)}
.sec-head p{margin:8px 0 0;font-size:15px;color:var(--c-text-2)}

/* ---------- 延伸阅读 ---------- */
.related{padding:var(--gap-section) 0 0}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--c-accent-100)}
.rel-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.rel-card .rc-body{padding:18px 20px 22px}
.rel-card h3{font-size:17px;margin-bottom:8px}
.rel-card p{margin:0;font-size:14px;line-height:1.75;color:var(--c-text-2)}

/* ---------- FAQ ---------- */
.faq{padding:var(--gap-section) 0 0}
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 48px}
.faq-item{border-bottom:1px solid var(--c-line);transition:background-color .18s ease}
.faq-item.is-open{background:var(--c-surface-2)}
.faq-q{width:100%;display:flex;align-items:flex-start;gap:14px;padding:20px 16px 20px 4px;background:none;border:0;text-align:left;cursor:pointer;font-size:16px;font-weight:500;color:var(--c-text)}
.faq-q .num{flex:none;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;letter-spacing:.06em;color:var(--c-brass);padding-top:5px}
.faq-q .qt{flex:1;line-height:1.6}
.faq-q .ico{flex:none;width:20px;height:20px;margin-top:4px;transition:transform .22s ease;stroke:var(--c-brand-500)}
.faq-item.is-open .faq-q .ico{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{margin:0;padding:0 40px 20px 42px;font-size:15px;line-height:1.85;color:var(--c-text-2)}

/* ---------- 底部 CTA ---------- */
.cta{padding:var(--gap-section) 0 0}
.cta-box{position:relative;overflow:hidden;display:grid;grid-template-columns:5fr 7fr;gap:48px;padding:48px;border-radius:18px;background:linear-gradient(120deg,#12241E 0%,#1E3A32 100%);color:#E7EFEA}
.cta-box::after{content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(169,138,75,.22),transparent 68%)}
.cta-box > *{position:relative;z-index:2}
.cta-box h2{color:#F4F1E9;font-size:clamp(22px,2.6vw,30px);margin-bottom:14px}
.cta-box p{color:rgba(231,239,234,.78);font-size:15.5px;margin-bottom:18px}
.cta-points{list-style:none;padding:0;margin:0}
.cta-points li{position:relative;padding-left:20px;font-size:14.5px;color:rgba(231,239,234,.8);margin-bottom:8px}
.cta-points li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:50%;border:1.5px solid var(--c-brass)}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;color:rgba(231,239,234,.85)}
.field input,.field textarea{width:100%;height:48px;padding:0 14px;border-radius:var(--r-btn);border:1px solid rgba(231,239,234,.28);background:#FFFFFF;color:var(--c-text);outline:none;transition:border-color .18s ease,box-shadow .18s ease}
.field textarea{height:104px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus{border-color:var(--c-brand-500);box-shadow:0 0 0 3px rgba(51,96,79,.16)}
.form-tip{display:none;margin-top:12px;font-size:14px;color:#F0D9A6}

/* ---------- 回到顶部 ---------- */
.to-top{position:fixed;right:28px;bottom:28px;z-index:70;display:flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:50%;background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--sh-2);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .22s ease,transform .22s ease,visibility .22s ease}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top svg{width:20px;height:20px;stroke:var(--c-brand-700)}

/* ---------- 页脚 ---------- */
.site-foot{margin-top:var(--gap-section);background:var(--c-brand-900);color:#E7EFEA}
.site-foot .wrap{padding-top:64px;padding-bottom:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr}
.foot-col{padding:0 28px;border-left:1px solid rgba(255,255,255,.12)}
.foot-col:first-child{border-left:0;padding-left:0}
.foot-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;font-size:17px;font-weight:700;letter-spacing:.04em;color:#F4F1E9}
.foot-intro{margin:0 0 18px;font-size:14px;line-height:1.8;color:rgba(231,239,234,.72)}
.foot-contact{display:flex;flex-direction:column;gap:6px;font-size:13.5px;color:rgba(231,239,234,.66)}
.foot-contact a{color:var(--c-brass);border-bottom:1px solid rgba(169,138,75,.5);align-self:flex-start;transition:color .18s ease}
.foot-contact a:hover{color:var(--c-accent-500)}
.foot-title{font-size:14px;font-weight:600;color:#F4F1E9;letter-spacing:.08em;margin-bottom:14px}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-links a{font-size:14px;color:rgba(231,239,234,.72);transition:color .18s ease}
.foot-links a:hover{color:var(--c-brass)}
.foot-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-top:48px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(231,239,234,.6)}

/* ---------- 断点 ---------- */
@media (max-width:1279px){
  .art-layout{grid-template-columns:minmax(0,1fr);gap:36px}
  .art-side{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1 1 260px}
}
@media (max-width:1023px){
  :root{--gap-section:64px}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 0}
  .foot-col{padding:0 20px}
  .foot-col:nth-child(3){border-left:0;padding-left:0}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-box{grid-template-columns:1fr;gap:32px;padding:36px}
  .faq-grid{grid-template-columns:minmax(0,1fr);gap:0}
  .art-main{padding:36px 32px}
  .art-body{max-width:none}
}
@media (max-width:900px){
  .brand-tools .search-box,.brand-tools .head-note,.brand-tools .btn-sm{display:none}
  .menu-btn{display:inline-flex}
  .chan-row{display:none}
  .hot-tags{display:none}
  .drawer{display:block;position:fixed;left:0;right:0;top:56px;z-index:55;padding:20px 0 26px;background:var(--c-surface);border-bottom:1px solid var(--c-line);box-shadow:var(--sh-3);opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .2s ease,transform .2s ease,visibility .2s ease}
  .drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .drawer .drawer-nav{display:flex;flex-direction:column;margin:0 0 18px}
  .drawer .drawer-nav a{padding:13px 0;font-size:16px;color:var(--c-text-2);border-bottom:1px solid var(--c-line)}
  .drawer .drawer-nav a.is-active{color:var(--c-brand-900);font-weight:700}
  .drawer .search-box{width:100%;height:44px}
  .drawer .drawer-cta{margin-top:18px}
}
@media (max-width:767px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .brand-row{height:56px}
  .brand{font-size:16px}
  .art-hero{padding:36px 0 34px}
  .art-layout{padding-top:32px}
  .art-main{padding:24px 18px;border-radius:12px}
  .art-body h2{font-size:21px}
  .art-body h3{font-size:18px}
  .rel-grid{grid-template-columns:minmax(0,1fr)}
  .cta-box{padding:26px 20px;border-radius:14px}
  .form-grid{grid-template-columns:minmax(0,1fr)}
  .faq-a p{padding:0 24px 18px 34px}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-foot .wrap{padding-top:44px}
  .foot-bar{margin-top:32px;flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:18px;width:46px;height:46px}
}
@media (max-width:519px){
  .foot-grid{grid-template-columns:minmax(0,1fr)}
  .foot-col{padding:0;border-left:0}
  .art-meta{gap:10px}
}

/* roulang page: category2 */
:root{
    --c-brand-900:#12241E;
    --c-brand-700:#1E3A32;
    --c-brand-500:#33604F;
    --c-brand-100:#E7EFEA;
    --c-accent-600:#B2453D;
    --c-accent-500:#C4574A;
    --c-accent-100:#F7E7E3;
    --c-brass:#A98A4B;
    --c-paper:#F7F3EB;
    --c-surface:#FFFFFF;
    --c-surface-2:#FCFAF6;
    --c-ink:#16211C;
    --c-ink-2:#4A574F;
    --c-ink-3:#7C877F;
    --c-line:#E3DACB;
    --r-card:14px;
    --r-btn:10px;
    --r-pill:999px;
    --sh-1:0 1px 2px rgba(18,36,30,.05);
    --sh-2:0 2px 4px rgba(18,36,30,.06),0 12px 28px -14px rgba(18,36,30,.18);
    --sh-3:0 18px 40px -18px rgba(18,36,30,.28);
    --gap-section:88px;
    --container:1200px;
    --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
    --sans:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  }
  *{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:130px}
  body{
    margin:0;background:var(--c-paper);color:var(--c-ink);
    font-family:var(--sans);font-size:16px;line-height:1.9;
    overflow-x:hidden;
  }
  body.nav-open{overflow:hidden}
  img{max-width:100%;display:block}
  svg{flex:0 0 auto}
  a{color:inherit;text-decoration:none}
  button,input,textarea{font:inherit;color:inherit}
  button{background:none;border:0;cursor:pointer}
  h1,h2,h3{margin:0;font-family:var(--serif);letter-spacing:-.01em;color:var(--c-brand-900)}
  h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3}
  h3{font-size:18px;line-height:1.45}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--c-brass);outline-offset:2px;border-radius:6px}

  .wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
  .section{padding:var(--gap-section) 0}
  .section.tight{padding:56px 0}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 26px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;letter-spacing:.02em;
    transition:all .18s ease-out;white-space:nowrap;
  }
  .btn-primary{background:var(--c-accent-600);color:#fff;border:1px solid var(--c-accent-600)}
  .btn-primary:hover{background:var(--c-accent-500);border-color:var(--c-accent-500);transform:translateY(-1px);box-shadow:var(--sh-2)}
  .btn-primary:active{transform:translateY(0);filter:brightness(.96)}
  .btn-ghost{background:transparent;border:1.5px solid var(--c-brand-700);color:var(--c-brand-700)}
  .btn-ghost:hover{background:var(--c-brand-700);color:#fff;transform:translateY(-1px)}
  .btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:9px}
  .btn-block{width:100%}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;
    color:var(--c-brand-500);transition:color .18s ease-out;
  }
  .link-arrow svg{transition:transform .18s ease-out}
  .link-arrow:hover{color:var(--c-accent-600)}
  .link-arrow:hover svg{transform:translateX(3px)}

  /* ============ 头部导航 ============ */
  .site-head{
    position:sticky;top:0;z-index:70;background:var(--c-surface);
    border-bottom:1px solid var(--c-line);transition:box-shadow .22s ease-out;
  }
  .site-head.is-stuck{box-shadow:var(--sh-2)}
  .head-brand{border-bottom:1px solid var(--c-line);transition:height .2s ease-out}
  .brand-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:56px}
  .brand{display:flex;align-items:center;gap:10px}
  .logo-mark{width:24px;height:24px}
  .logo-text{
    font-family:var(--serif);font-size:18px;font-weight:700;letter-spacing:.04em;
    color:var(--c-brand-900);white-space:nowrap;
  }
  .brand-tools{display:flex;align-items:center;gap:14px}
  .head-search{
    display:flex;align-items:center;gap:8px;
    width:220px;height:38px;padding:0 14px;
    background:var(--c-surface-2);border:1px solid var(--c-line);border-radius:var(--r-pill);
    transition:border-color .18s ease-out,box-shadow .18s ease-out;
  }
  .head-search svg{color:var(--c-ink-3)}
  .head-search input{
    flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;
  }
  .head-search input::placeholder{color:var(--c-ink-3)}
  .head-search:focus-within{border-color:var(--c-brand-500);box-shadow:0 0 0 3px rgba(51,96,79,.12)}
  .head-link{font-size:14px;color:var(--c-ink-2);transition:color .18s ease-out}
  .head-link:hover{color:var(--c-accent-600)}
  .nav-toggle{
    display:none;width:40px;height:40px;align-items:center;justify-content:center;
    border:1px solid var(--c-line);border-radius:9px;color:var(--c-brand-700);
  }
  .head-chan{background:var(--c-surface)}
  .chan-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:46px}
  .chan-list{display:flex;align-items:center;height:46px;overflow-x:auto;scrollbar-width:none}
  .chan-list::-webkit-scrollbar{display:none}
  .chan{
    position:relative;display:inline-flex;align-items:center;height:46px;padding:0 16px;
    font-size:15px;color:var(--c-ink-2);white-space:nowrap;transition:color .18s ease-out;
  }
  .chan::after{
    content:"";position:absolute;left:16px;right:16px;bottom:0;height:2px;
    background:var(--c-accent-600);transform:scaleX(0);transform-origin:left;
    transition:transform .2s ease-out;
  }
  .chan:hover{color:var(--c-brand-900)}
  .chan:hover::after{transform:scaleX(1)}
  .chan.is-active{color:var(--c-brand-900);font-weight:700}
  .chan.is-active::after{transform:scaleX(1)}
  .chan-trend{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-3);white-space:nowrap}
  .trend-pill{
    padding:3px 12px;border:1px solid var(--c-line);border-radius:var(--r-pill);
    font-size:13px;color:var(--c-ink-2);transition:all .18s ease-out;
  }
  .trend-pill:hover{border-color:var(--c-accent-100);color:var(--c-accent-600);background:var(--c-accent-100)}

  /* 移动抽屉 */
  .mobile-drawer{
    display:none;position:fixed;top:56px;left:0;right:0;bottom:0;z-index:65;
    background:var(--c-surface);border-top:1px solid var(--c-line);
    padding:20px 24px 40px;overflow-y:auto;
  }
  .mobile-drawer.is-open{display:block}
  .drawer-search{
    display:flex;align-items:center;gap:8px;height:46px;padding:0 16px;
    background:var(--c-surface-2);border:1px solid var(--c-line);border-radius:var(--r-pill);
    margin-bottom:20px;
  }
  .drawer-search input{flex:1;border:0;background:transparent;outline:none;font-size:15px}
  .drawer-title{font-size:13px;letter-spacing:.08em;color:var(--c-brass);font-weight:600;margin:22px 0 10px}
  .drawer-nav{display:grid;gap:2px}
  .drawer-nav a{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 4px;font-size:16px;border-bottom:1px solid var(--c-line);color:var(--c-ink);
  }
  .drawer-nav a.is-active{color:var(--c-accent-600);font-weight:600}
  .drawer-tags{display:flex;flex-wrap:wrap;gap:8px}
  .drawer-cta{margin-top:26px}

  /* ============ Hero ============ */
  .hero{position:relative;background:var(--c-paper);border-bottom:1px solid var(--c-line);padding:44px 0 0;overflow:hidden}
  .hero::before{
    content:"";position:absolute;right:-150px;top:-190px;width:560px;height:560px;
    background:repeating-radial-gradient(circle at center,rgba(51,96,79,.05) 0 1px,transparent 1px 34px);
    pointer-events:none;
  }
  .hero .wrap{position:relative;z-index:1}
  .crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-3)}
  .crumbs a{transition:color .18s ease-out}
  .crumbs a:hover{color:var(--c-accent-600)}
  .crumbs span.sep{color:var(--c-line)}
  .hero h1{
    font-size:clamp(26px,3.6vw,38px);line-height:1.28;margin-top:16px;max-width:900px;
  }
  .hero-sub{margin-top:14px;font-size:16px;color:var(--c-ink-2);max-width:700px}
  .brass-line{
    height:1px;margin-top:28px;
    background:linear-gradient(90deg,var(--c-brass) 0%,rgba(169,138,75,.25) 42%,rgba(169,138,75,0) 100%);
  }

  /* ============ 数据条 ============ */
  .stats{background:var(--c-surface);border-bottom:1px solid var(--c-line)}
  .stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
  .stat{padding:22px 12px;text-align:center;border-left:1px solid var(--c-line)}
  .stat:first-child{border-left:0}
  .stat b{
    display:block;font-family:var(--serif);font-size:clamp(22px,2.4vw,30px);
    line-height:1.2;color:var(--c-brand-900);font-weight:700;
  }
  .stat span{display:block;margin-top:4px;font-size:13px;color:var(--c-ink-3)}

  /* ============ 板块标题 ============ */
  .sec-head{margin-bottom:38px;max-width:820px}
  .sec-kicker{
    display:inline-block;font-size:12px;letter-spacing:.16em;font-weight:600;
    color:var(--c-brass);margin-bottom:12px;
  }
  .sec-desc{margin-top:12px;font-size:15px;color:var(--c-ink-2);line-height:1.85}

  /* ============ 主体 8/4 分栏 ============ */
  .layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}
  .side{position:sticky;top:132px;display:grid;gap:18px}
  .side-card{
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--sh-1);padding:20px;
  }
  .side-card h3{font-size:16px;margin-bottom:12px}
  .side-links{display:grid;gap:2px}
  .side-links a{
    display:block;padding:9px 0 9px 14px;position:relative;font-size:14px;color:var(--c-ink-2);
    transition:color .18s ease-out;
  }
  .side-links a::before{
    content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;
    background:var(--c-line);transition:background .18s ease-out;
  }
  .side-links a:hover{color:var(--c-accent-600)}
  .side-links a:hover::before{background:var(--c-accent-600)}
  .side-note{font-size:13px;color:var(--c-ink-3);line-height:1.8}
  .side-card.accent{background:var(--c-surface-2)}

  /* ============ 时间线 ============ */
  .tl{position:relative;padding-left:36px}
  .tl::before{
    content:"";position:absolute;left:11px;top:8px;bottom:14px;width:2px;
    background:linear-gradient(180deg,var(--c-brass) 0%,rgba(169,138,75,.18) 100%);
  }
  .tl-item{position:relative;padding-bottom:40px}
  .tl-item:last-child{padding-bottom:0}
  .tl-item::before{
    content:"";position:absolute;left:-31px;top:9px;width:12px;height:12px;border-radius:50%;
    background:var(--c-surface);border:2px solid var(--c-brass);
  }
  .tl-num{
    font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
    font-size:12px;letter-spacing:.14em;color:var(--c-brass);display:block;margin-bottom:6px;
  }
  .tl-item h3{font-size:19px}
  .tl-item p{margin-top:8px;font-size:15.5px;color:var(--c-ink-2);line-height:1.85;max-width:640px}
  .tl-item .link-arrow{margin-top:10px}

  /* ============ 主题卡 ============ */
  .theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .theme-card{
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
    overflow:hidden;box-shadow:var(--sh-1);transition:all .18s ease-out;
  }
  .theme-card:hover{border-color:var(--c-accent-100);box-shadow:var(--sh-2);transform:translateY(-2px)}
  .theme-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
  .theme-body{padding:18px 20px 22px}
  .tag{
    display:inline-block;padding:2px 10px;border:1px solid var(--c-line);border-radius:var(--r-pill);
    font-size:12px;color:var(--c-brand-500);background:var(--c-surface-2);margin-bottom:10px;
  }
  .theme-body h3{font-size:17px}
  .theme-body p{margin-top:8px;font-size:14.5px;color:var(--c-ink-2);line-height:1.8}
  .theme-body .link-arrow{margin-top:14px}

  /* ============ 要点卡 ============ */
  .point-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
  .point-card{
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--sh-1);padding:24px;transition:all .18s ease-out;
  }
  .point-card:hover{border-color:var(--c-accent-100);box-shadow:var(--sh-2);transform:translateY(-2px)}
  .point-ico{
    width:40px;height:40px;border-radius:10px;background:var(--c-brand-100);
    display:flex;align-items:center;justify-content:center;color:var(--c-brand-700);margin-bottom:14px;
  }
  .point-card h3{font-size:17px}
  .point-card p{margin-top:8px;font-size:14.5px;color:var(--c-ink-2);line-height:1.8}

  /* ============ FAQ ============ */
  .faq-list{display:grid;grid-template-columns:1fr 1fr;gap:0 44px;border-top:1px solid var(--c-line)}
  .faq-item{border-bottom:1px solid var(--c-line);transition:background .18s ease-out}
  .faq-item.is-open{background:var(--c-surface-2)}
  .faq-q{
    width:100%;display:flex;align-items:center;gap:14px;text-align:left;
    padding:18px 12px 18px 0;font-size:16px;font-weight:500;color:var(--c-ink);
    transition:color .18s ease-out;
  }
  .faq-q:hover{color:var(--c-accent-600)}
  .faq-num{
    font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;
    letter-spacing:.06em;color:var(--c-brass);
  }
  .faq-ico{margin-left:auto;color:var(--c-brand-500);transition:transform .2s ease-out}
  .faq-item.is-open .faq-ico{transform:rotate(180deg)}
  .faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .22s ease-out}
  .faq-item.is-open .faq-a{grid-template-rows:1fr}
  .faq-a>div{overflow:hidden}
  .faq-a p{padding:0 12px 20px 30px;font-size:15px;color:var(--c-ink-2);line-height:1.85}

  /* ============ 深色 CTA + 表单 ============ */
  .cta-band{position:relative;background:var(--c-brand-900);color:var(--c-brand-100);overflow:hidden}
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background-image:url(/assets/images/backpic/back-3.png);
    background-size:cover;background-position:center;opacity:.16;
  }
  .cta-band .wrap{position:relative;z-index:1}
  .cta-grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;padding:var(--gap-section) 0;align-items:start}
  .cta-band h2{color:#F7F3EB}
  .cta-band .cta-desc{margin-top:14px;font-size:15.5px;color:rgba(231,239,234,.8);line-height:1.9;max-width:420px}
  .cta-meta{margin-top:26px;display:grid;gap:10px}
  .cta-meta li{display:flex;gap:10px;font-size:14px;color:rgba(231,239,234,.78);align-items:flex-start}
  .cta-meta svg{margin-top:5px;color:var(--c-brass)}
  .form-card{
    background:rgba(255,255,255,.05);border:1px solid rgba(231,239,234,.18);
    border-radius:var(--r-card);padding:28px;backdrop-filter:blur(2px);
  }
  .field{margin-bottom:16px}
  .field label{display:block;font-size:13px;color:rgba(231,239,234,.75);margin-bottom:7px}
  .field input,.field textarea{
    width:100%;height:48px;padding:0 14px;border-radius:var(--r-btn);
    border:1px solid rgba(231,239,234,.26);background:rgba(255,255,255,.06);
    color:#F7F3EB;font-size:15px;outline:none;
    transition:border-color .18s ease-out,box-shadow .18s ease-out;
  }
  .field textarea{height:106px;padding:12px 14px;line-height:1.75;resize:vertical}
  .field input::placeholder,.field textarea::placeholder{color:rgba(231,239,234,.42)}
  .field input:focus,.field textarea:focus{
    border-color:var(--c-brass);box-shadow:0 0 0 3px rgba(169,138,75,.2);
  }
  .form-note{
    margin-top:14px;font-size:13.5px;color:var(--c-brass);min-height:20px;opacity:0;
    transition:opacity .2s ease-out;
  }
  .form-note.is-show{opacity:1}

  /* ============ 页脚 ============ */
  .site-foot{background:var(--c-brand-900);color:var(--c-brand-100);padding:66px 0 0}
  .foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:0}
  .foot-col{padding:0 28px;border-left:1px solid rgba(255,255,255,.12)}
  .foot-col:first-child{border-left:0;padding-left:0}
  .foot-brand{display:flex;align-items:center;gap:10px}
  .foot-brand .logo-text{color:#F7F3EB;font-size:18px;font-weight:700;letter-spacing:.04em}
  .foot-intro{margin-top:14px;font-size:14px;line-height:1.85;color:rgba(231,239,234,.72);max-width:320px}
  .foot-contact{margin-top:16px;display:grid;gap:6px;font-size:13px;color:rgba(231,239,234,.6)}
  .foot-contact a{color:var(--c-brass);transition:color .18s ease-out}
  .foot-contact a:hover{color:var(--c-accent-500)}
  .foot-title{font-size:14px;font-weight:600;color:#F7F3EB;letter-spacing:.04em;margin-bottom:14px}
  .foot-links{display:grid;gap:10px}
  .foot-links a{font-size:14px;color:rgba(231,239,234,.72);transition:color .18s ease-out}
  .foot-links a:hover{color:var(--c-brass)}
  .foot-bar{
    margin-top:58px;border-top:1px solid rgba(255,255,255,.12);padding:20px 0;
    display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
    font-size:13px;color:rgba(231,239,234,.55);
  }

  /* ============ 响应式 ============ */
  @media (max-width:1023px){
    :root{--gap-section:56px}
    .layout{grid-template-columns:1fr;gap:34px}
    .side{position:static;grid-template-columns:1fr 1fr}
    .theme-grid{grid-template-columns:1fr 1fr}
    .cta-grid{grid-template-columns:1fr;gap:32px;padding:56px 0}
    .foot-grid{grid-template-columns:1fr 1fr;gap:36px 0}
    .foot-col{padding:0 20px}
    .foot-col:nth-child(3){border-left:0;padding-left:0}
    .foot-col:nth-child(4){border-left:0;padding-left:0}
  }
  @media (max-width:900px){
    .head-chan{display:none}
    .head-search,.head-link{display:none}
    .nav-toggle{display:inline-flex}
  }
  @media (max-width:767px){
    .wrap{padding:0 18px}
    .hero{padding:32px 0 0}
    .brass-line{margin-top:22px}
    .stats-grid{grid-template-columns:1fr 1fr}
    .stat:nth-child(3){border-left:0}
    .stat{border-top:1px solid var(--c-line)}
    .stat:nth-child(-n+2){border-top:0}
    .theme-grid{grid-template-columns:1fr}
    .point-grid{grid-template-columns:1fr}
    .faq-list{grid-template-columns:1fr}
    .side{grid-template-columns:1fr}
    .tl{padding-left:30px}
    .tl-item::before{left:-26px}
    .tl::before{left:9px}
    .form-card{padding:20px}
    .foot-grid{grid-template-columns:1fr 1fr;gap:30px 0}
    .foot-bar{flex-direction:column;margin-top:40px}
    .head-link{display:none}
  }
  @media (max-width:520px){
    body{font-size:16px}
    .hero h1{font-size:24px}
    .stats-grid{grid-template-columns:1fr 1fr}
    .foot-grid{grid-template-columns:1fr}
    .foot-col{border-left:0;padding-left:0}
    .chan-trend{display:none}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition-duration:.01ms !important;animation-duration:.01ms !important}
    html{scroll-behavior:auto}
  }

/* roulang page: category1 */
:root{
  --c-brand-900:#12241E;
  --c-brand-700:#1E3A32;
  --c-brand-500:#33604F;
  --c-brand-100:#E7EFEA;
  --c-accent-600:#B2453D;
  --c-accent-500:#C4574A;
  --c-accent-100:#F7E7E3;
  --c-brass:#A98A4B;
  --c-paper:#F7F3EB;
  --c-surface:#FFFFFF;
  --c-surface-2:#FCFAF6;
  --c-ink:#16211C;
  --c-ink-2:#4A574F;
  --c-ink-3:#7C877F;
  --c-line:#E3DACB;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-img:14px;
  --sh-1:0 1px 2px rgba(18,36,30,.05);
  --sh-2:0 2px 4px rgba(18,36,30,.06), 0 12px 28px -14px rgba(18,36,30,.18);
  --sh-3:0 18px 40px -18px rgba(18,36,30,.28);
  --gap-section:88px;
  --container:1200px;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;
  font-family:var(--font-sans);
  font-size:17px;line-height:1.9;
  color:var(--c-ink);
  background:var(--c-paper);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}
a{color:inherit;text-decoration:none;transition:color 180ms ease-out;}
img{max-width:100%;display:block;}
button,input,textarea{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;}
svg{display:block;}
:focus-visible{outline:2px solid var(--c-brass);outline-offset:2px;border-radius:4px;}
::selection{background:var(--c-brand-100);color:var(--c-brand-900);}

.wrap{max-width:var(--container);margin:0 auto;padding:0 24px;}
.serif{font-family:var(--font-serif);letter-spacing:-0.01em;}
.gold-line{height:1px;background:var(--c-brass);opacity:.55;border:0;}

/* ============ 头部 ============ */
.site-head{
  position:sticky;top:0;z-index:60;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow 200ms ease-out;
}
.site-head.is-scrolled{box-shadow:var(--sh-2);}
.brand-inner{display:flex;align-items:center;gap:20px;height:56px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{width:26px;height:26px;}
.logo-text{
  font-family:var(--font-serif);
  font-size:18px;font-weight:700;letter-spacing:.04em;
  color:var(--c-brand-900);white-space:nowrap;
}
.head-tools{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search{
  display:flex;align-items:center;gap:8px;
  width:220px;height:36px;padding:0 14px;
  background:var(--c-surface-2);
  border:1px solid var(--c-line);border-radius:var(--r-pill);
  transition:border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.search svg{width:15px;height:15px;stroke:var(--c-ink-3);}
.search input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;color:var(--c-ink);
}
.search input::placeholder{color:var(--c-ink-3);}
.search:focus-within{border-color:var(--c-brand-500);box-shadow:0 0 0 3px rgba(51,96,79,.12);}
.head-link{
  font-size:14px;color:var(--c-ink-2);
  border-bottom:1px solid transparent;padding-bottom:2px;
}
.head-link:hover{color:var(--c-accent-600);border-bottom-color:var(--c-accent-600);}
.head-chan{border-top:1px solid var(--c-line);background:var(--c-surface);}
.chan-inner{display:flex;align-items:center;gap:20px;height:46px;}
.chan-list{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none;}
.chan-list::-webkit-scrollbar{display:none;}
.chan{
  position:relative;display:inline-block;
  padding:0 16px;line-height:46px;
  font-size:15px;color:var(--c-ink-2);white-space:nowrap;
}
.chan::after{
  content:"";position:absolute;left:16px;right:16px;bottom:0;
  height:2px;background:var(--c-accent-500);
  transform:scaleX(0);transform-origin:left;
  transition:transform 200ms ease-out;
}
.chan:hover{color:var(--c-brand-900);}
.chan:hover::after{transform:scaleX(1);}
.chan.is-active{color:var(--c-brand-900);font-weight:700;}
.chan.is-active::after{transform:scaleX(1);}
.trend{display:flex;align-items:center;gap:8px;margin-left:auto;overflow-x:auto;scrollbar-width:none;}
.trend::-webkit-scrollbar{display:none;}
.trend-label{font-size:13px;color:var(--c-ink-3);white-space:nowrap;}
.trend a{
  font-size:13px;color:var(--c-ink-2);white-space:nowrap;
  padding:4px 12px;border:1px solid var(--c-line);border-radius:var(--r-pill);
  background:var(--c-surface-2);
}
.trend a:hover{color:var(--c-accent-600);border-color:var(--c-accent-100);}
.menu-btn{
  display:none;width:40px;height:40px;margin-left:auto;
  align-items:center;justify-content:center;
  border:1px solid var(--c-line);border-radius:10px;background:var(--c-surface-2);
}
.menu-btn svg{width:20px;height:20px;stroke:var(--c-brand-900);}
.drawer{
  display:none;
  border-top:1px solid var(--c-line);
  background:var(--c-surface);
  padding:16px 24px 22px;
}
.drawer.is-open{display:block;}
.drawer .search{width:100%;margin-bottom:14px;}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:14px;}
.drawer-nav a{
  padding:12px 4px;font-size:16px;color:var(--c-ink-2);
  border-bottom:1px dashed var(--c-line);
}
.drawer-nav a.is-active{color:var(--c-brand-900);font-weight:700;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;
  border-radius:var(--r-btn);font-size:16px;font-weight:600;
  transition:all 180ms ease-out;white-space:nowrap;
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:8px;}
.btn-primary{background:var(--c-accent-600);color:#fff;}
.btn-primary:hover{background:var(--c-accent-500);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-ghost{background:transparent;border:1.5px solid var(--c-brand-700);color:var(--c-brand-700);}
.btn-ghost:hover{background:var(--c-brand-700);color:#fff;transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-light{background:#fff;color:var(--c-brand-900);}
.btn-light:hover{background:var(--c-brand-100);transform:translateY(-1px);box-shadow:var(--sh-2);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--c-accent-600);
  border-bottom:1px solid transparent;
}
.link-arrow svg{width:15px;height:15px;stroke:var(--c-accent-600);transition:transform 180ms ease-out;}
.link-arrow:hover{color:var(--c-accent-500);border-bottom-color:var(--c-accent-500);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ============ 窄 Hero ============ */
.page-hero{
  position:relative;
  padding:52px 0 34px;
  background:
    radial-gradient(circle at 88% 18%, rgba(169,138,75,.10) 0 22%, transparent 60%),
    radial-gradient(circle at 12% 92%, rgba(51,96,79,.08) 0 18%, transparent 62%),
    linear-gradient(rgba(247,243,235,.94), rgba(247,243,235,.97)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--c-line);
}
.crumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--c-ink-3);margin-bottom:18px;
}
.crumb a{color:var(--c-ink-3);}
.crumb a:hover{color:var(--c-accent-600);}
.crumb .sep{color:var(--c-line);}
.crumb .now{color:var(--c-ink-2);}
.page-hero h1{
  font-family:var(--font-serif);
  font-size:clamp(28px,4.2vw,44px);
  line-height:1.25;letter-spacing:-0.01em;
  color:var(--c-brand-900);max-width:20em;
}
.page-hero .lede{
  margin-top:14px;font-size:17px;color:var(--c-ink-2);max-width:46em;
}
.hero-line{margin-top:28px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;margin-top:26px;
}
.hero-stats .stat{padding-right:20px;border-right:1px dashed var(--c-line);}
.hero-stats .stat:last-child{border-right:0;padding-right:0;}
.stat-num{
  font-family:var(--font-serif);font-size:clamp(24px,2.6vw,32px);
  color:var(--c-brand-700);line-height:1.2;
}
.stat-label{margin-top:6px;font-size:13px;color:var(--c-ink-3);line-height:1.7;}

/* ============ 主体：锚点 + 内容流 ============ */
.section{padding:var(--gap-section) 0;}
.section-head{margin-bottom:34px;max-width:52em;}
.section-head h2{
  font-family:var(--font-serif);
  font-size:clamp(22px,2.6vw,30px);line-height:1.3;
  color:var(--c-brand-900);letter-spacing:-0.01em;
}
.section-head p{margin-top:12px;font-size:16px;color:var(--c-ink-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--c-brass);
  text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--c-brass);}

.doc-layout{display:grid;grid-template-columns:224px minmax(0,1fr);gap:56px;align-items:start;}
.side-nav{position:sticky;top:132px;}
.side-nav .side-title{
  font-size:12px;letter-spacing:.16em;color:var(--c-ink-3);margin-bottom:14px;
}
.side-nav ul{display:flex;flex-direction:column;gap:2px;}
.side-nav a{
  position:relative;display:block;
  padding:9px 0 9px 16px;font-size:14px;color:var(--c-ink-2);
  border-left:2px solid var(--c-line);
}
.side-nav a::before{
  content:"";position:absolute;left:-2px;top:0;bottom:0;width:2px;
  background:var(--c-accent-500);transform:scaleY(0);transition:transform 200ms ease-out;
}
.side-nav a:hover{color:var(--c-brand-900);}
.side-nav a:hover::before,.side-nav a.is-current::before{transform:scaleY(1);}
.side-nav a.is-current{color:var(--c-brand-900);font-weight:600;}
.side-contact{
  margin-top:22px;padding:18px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
}
.side-contact p{font-size:13px;color:var(--c-ink-3);line-height:1.7;}
.side-contact a{
  display:inline-flex;margin-top:10px;font-size:14px;font-weight:600;color:var(--c-accent-600);
}
.side-contact a:hover{color:var(--c-accent-500);}

.doc-block{
  padding-bottom:52px;margin-bottom:52px;
  border-bottom:1px dashed var(--c-line);
}
.doc-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0;}
.doc-num{
  font-family:var(--font-serif);font-size:13px;letter-spacing:.18em;
  color:var(--c-brass);margin-bottom:10px;
}
.doc-block h3{
  font-family:var(--font-serif);
  font-size:clamp(20px,2vw,24px);line-height:1.4;
  color:var(--c-brand-900);margin-bottom:14px;
}
.doc-block p{font-size:16px;line-height:1.85;color:var(--c-ink-2);}
.doc-block p + p{margin-top:12px;}
.doc-figure{
  margin-top:22px;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--c-line);box-shadow:var(--sh-1);
  aspect-ratio:16/10;background:var(--c-surface-2);
}
.doc-figure img{width:100%;height:100%;object-fit:cover;}
.doc-points{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.doc-points li{
  position:relative;padding-left:20px;font-size:15px;color:var(--c-ink-2);line-height:1.8;
}
.doc-points li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:7px;height:7px;border-radius:50%;background:var(--c-brass);
}

/* ============ 适用情形 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.scene-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-1);
  transition:transform 180ms ease-out,box-shadow 180ms ease-out,border-color 180ms ease-out;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--c-accent-100);}
.scene-icon{
  width:40px;height:40px;border-radius:10px;
  background:var(--c-brand-100);display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;
}
.scene-icon svg{width:22px;height:22px;stroke:var(--c-brand-500);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.scene-card h3{font-size:18px;line-height:1.5;color:var(--c-brand-900);font-weight:600;margin-bottom:8px;}
.scene-card p{font-size:15px;line-height:1.8;color:var(--c-ink-2);}

/* ============ 深色关注点 ============ */
.dark-panel{
  background:var(--c-brand-900);color:#E7EFEA;
  border-radius:18px;padding:52px;position:relative;overflow:hidden;
}
.dark-panel::after{
  content:"";position:absolute;right:-80px;bottom:-120px;width:340px;height:340px;
  border-radius:50%;border:1px solid rgba(169,138,75,.28);
}
.dark-panel h2{
  font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);
  line-height:1.3;color:#fff;
}
.dark-panel .dark-sub{margin-top:12px;font-size:16px;color:rgba(231,239,234,.78);max-width:44em;}
.dark-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin-top:34px;position:relative;z-index:1;}
.dark-item{padding-left:18px;border-left:1px solid rgba(169,138,75,.5);}
.dark-item .num{font-family:var(--font-serif);font-size:28px;color:#fff;line-height:1.2;}
.dark-item .lab{margin-top:8px;font-size:14px;line-height:1.75;color:rgba(231,239,234,.72);}
.dark-list{margin-top:32px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;position:relative;z-index:1;}
.dark-list div{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-card);padding:18px 20px;
  font-size:14px;line-height:1.8;color:rgba(231,239,234,.86);
}
.dark-list strong{display:block;color:#fff;font-size:15px;margin-bottom:6px;font-weight:600;}

/* ============ 发布节点 ============ */
.node-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
.node-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);
  transition:transform 180ms ease-out,box-shadow 180ms ease-out,border-color 180ms ease-out;
}
.node-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--c-accent-100);}
.node-tag{
  display:inline-block;font-size:12px;color:var(--c-ink-2);
  border:1px solid var(--c-line);border-radius:var(--r-pill);
  padding:3px 10px;margin-bottom:12px;background:var(--c-surface-2);
}
.node-card h3{font-size:17px;line-height:1.55;color:var(--c-brand-900);font-weight:600;margin-bottom:8px;}
.node-card p{font-size:14px;line-height:1.8;color:var(--c-ink-2);}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;display:flex;align-items:flex-start;gap:16px;
  padding:22px 8px;text-align:left;
  transition:background 180ms ease-out;
}
.faq-q:hover{background:var(--c-surface-2);}
.faq-q .idx{
  font-family:var(--font-serif);font-size:12px;letter-spacing:.14em;
  color:var(--c-brass);padding-top:5px;min-width:26px;
}
.faq-q .qtext{flex:1;font-size:16px;font-weight:500;line-height:1.7;color:var(--c-ink);}
.faq-q .sign{
  flex-shrink:0;width:22px;height:22px;margin-top:2px;
  position:relative;transition:transform 220ms ease-out;
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:var(--c-brand-700);border-radius:2px;
}
.faq-q .sign::before{left:0;right:0;top:10px;height:2px;}
.faq-q .sign::after{top:0;bottom:0;left:10px;width:2px;transition:opacity 200ms ease-out;}
.faq-item.is-open .faq-q{background:var(--c-surface-2);}
.faq-item.is-open .faq-q .sign{transform:rotate(180deg);}
.faq-item.is-open .faq-q .sign::after{opacity:0;}
.faq-a{
  display:none;padding:0 8px 24px 50px;
  font-size:15px;line-height:1.85;color:var(--c-ink-2);
}
.faq-item.is-open .faq-a{display:block;}

/* ============ CTA 条 ============ */
.cta-bar{
  background:var(--c-brand-900);color:#fff;border-radius:16px;
  padding:40px 44px;display:flex;align-items:center;gap:32px;justify-content:space-between;
  position:relative;overflow:hidden;
}
.cta-bar::after{
  content:"";position:absolute;left:-60px;top:-90px;width:260px;height:260px;
  border-radius:50%;border:1px solid rgba(169,138,75,.3);
}
.cta-bar h2{
  font-family:var(--font-serif);font-size:clamp(21px,2.3vw,27px);
  line-height:1.35;color:#fff;position:relative;z-index:1;
}
.cta-bar p{margin-top:10px;font-size:15px;color:rgba(231,239,234,.78);position:relative;z-index:1;}
.cta-bar .btn{position:relative;z-index:1;flex-shrink:0;}

/* ============ 表单 ============ */
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start;}
.contact-grid h2{
  font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);
  line-height:1.3;color:var(--c-brand-900);
}
.contact-grid .lead{margin-top:14px;font-size:16px;color:var(--c-ink-2);}
.contact-meta{margin-top:26px;display:flex;flex-direction:column;gap:12px;}
.contact-meta li{
  position:relative;padding-left:20px;font-size:15px;color:var(--c-ink-2);line-height:1.8;
}
.contact-meta li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;
  border-radius:50%;background:var(--c-brass);
}
.form-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:30px;box-shadow:var(--sh-2);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;color:var(--c-ink-2);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;background:var(--c-surface-2);
  border:1px solid var(--c-line);border-radius:var(--r-btn);
  padding:13px 14px;font-size:15px;line-height:1.6;outline:none;
  transition:border-color 180ms ease-out,box-shadow 180ms ease-out,background 180ms ease-out;
}
.field input{height:48px;padding:0 14px;}
.field textarea{min-height:112px;resize:vertical;}
.field input:focus,.field textarea:focus{
  background:#fff;border-color:var(--c-brand-500);
  box-shadow:0 0 0 3px rgba(51,96,79,.12);
}
.field input.err,.field textarea.err{border-color:var(--c-accent-600);}
.field .tip{display:none;margin-top:6px;font-size:13px;color:var(--c-accent-600);}
.field.has-err .tip{display:block;}
.form-note{margin-top:14px;font-size:13px;color:var(--c-ink-3);line-height:1.7;}
.form-ok{
  display:none;margin-top:16px;padding:12px 16px;border-radius:10px;
  background:var(--c-brand-100);color:var(--c-brand-700);
  font-size:14px;line-height:1.7;
}
.form-ok.show{display:block;}

/* ============ 页脚 ============ */
.site-foot{
  background:var(--c-brand-900);color:#E7EFEA;
  padding:64px 0 0;margin-top:var(--gap-section);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:0;}
.foot-col{padding:0 28px;border-right:1px solid rgba(255,255,255,.12);}
.foot-col:first-child{padding-left:0;}
.foot-col:last-child{border-right:0;padding-right:0;}
.foot-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.foot-brand .logo-mark{width:24px;height:24px;}
.foot-brand .logo-text{color:#fff;font-size:18px;}
.foot-intro{font-size:14px;line-height:1.8;color:rgba(231,239,234,.72);max-width:26em;}
.foot-contact{margin-top:18px;display:flex;flex-direction:column;gap:6px;font-size:14px;color:rgba(231,239,234,.72);}
.foot-contact a{color:var(--c-brass);}
.foot-contact a:hover{color:var(--c-accent-500);}
.foot-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.foot-links{display:flex;flex-direction:column;gap:10px;}
.foot-links a{font-size:14px;color:rgba(231,239,234,.74);}
.foot-links a:hover{color:var(--c-brass);}
.foot-bar{
  margin-top:52px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;font-size:13px;color:rgba(231,239,234,.6);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .doc-layout{gap:40px;}
}
@media (max-width:1023px){
  :root{--gap-section:56px;}
  .wrap{padding:0 20px;}
  .doc-layout{grid-template-columns:1fr;gap:28px;}
  .side-nav{position:static;}
  .side-nav ul{flex-direction:row;gap:10px;overflow-x:auto;padding-bottom:6px;}
  .side-nav a{
    border-left:0;border-bottom:2px solid var(--c-line);
    padding:8px 12px;white-space:nowrap;border-radius:8px 8px 0 0;
  }
  .side-nav a::before{display:none;}
  .side-nav a.is-current{border-bottom-color:var(--c-accent-500);}
  .side-contact{margin-top:16px;}
  .contact-grid{grid-template-columns:1fr;gap:28px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px 0;}
  .foot-col{padding:0 22px;}
  .foot-col:nth-child(2){border-right:0;padding-right:0;}
  .foot-col:nth-child(3){padding-left:0;}
  .foot-col:nth-child(3),.foot-col:nth-child(4){border-top:1px solid rgba(255,255,255,.12);padding-top:26px;}
  .foot-col:nth-child(3){border-right:1px solid rgba(255,255,255,.12);}
  .dark-panel{padding:38px 28px;}
  .dark-grid,.dark-list{grid-template-columns:1fr 1fr;}
  .node-grid{grid-template-columns:1fr 1fr;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:34px 28px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .head-tools .search,.head-tools .head-link{display:none;}
  .menu-btn{display:flex;}
  .chan-inner{height:auto;padding:0;}
  .chan{line-height:42px;padding:0 12px;font-size:14px;}
  .chan::after{left:12px;right:12px;}
  .trend{display:none;}
  .page-hero{padding:36px 0 28px;}
  .hero-stats{grid-template-columns:1fr;gap:16px;}
  .hero-stats .stat{border-right:0;border-bottom:1px dashed var(--c-line);padding:0 0 14px;}
  .hero-stats .stat:last-child{border-bottom:0;padding-bottom:0;}
  .scene-grid,.node-grid,.dark-grid,.dark-list{grid-template-columns:1fr;}
  .doc-block{padding-bottom:38px;margin-bottom:38px;}
  .faq-a{padding-left:8px;}
  .form-card{padding:22px;}
  .foot-grid{grid-template-columns:1fr;gap:26px;}
  .foot-col,.foot-col:nth-child(3){padding:0;border-right:0;border-top:1px solid rgba(255,255,255,.12);padding-top:24px;}
  .foot-col:first-child{border-top:0;padding-top:0;}
  .cta-bar{padding:28px 22px;}
  .cta-bar .btn{width:100%;}
}
@media (max-width:519px){
  .wrap{padding:0 16px;}
  .drawer{padding:14px 16px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}