/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --ink-900:#171325;
  --ink-800:#1F1A2E;
  --ink-700:#2A2440;
  --sand-50:#F7F5F2;
  --sand-100:#F0EDE7;
  --white:#FFFFFF;
  --aurora-500:#2FCFA8;
  --aurora-600:#25B092;
  --aurora-700:#1B7A61;
  --orbit-500:#6E5AE0;
  --text-900:#1C1826;
  --text-600:#6B6577;
  --text-400:#9A94A3;
  --line-200:#E6E2DB;
  --line-dark:rgba(255,255,255,.12);
  --error:#C8503F;
  --success:#2F9E6B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(23,19,37,.04);
  --sh-2:0 12px 32px -12px rgba(23,19,37,.10);
  --sh-3:0 18px 40px -14px rgba(23,19,37,.16);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,SimSun,serif;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.22,1,.36,1);
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text-900);
  background:var(--sand-50);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,h5{margin:0;font-family:var(--font-serif);font-weight:700;letter-spacing:-.01em;color:var(--text-900)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--aurora-500);outline-offset:2px;border-radius:6px}
::selection{background:rgba(47,207,168,.28);color:var(--ink-900)}

/* ============ 容器与板块 ============ */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-sm{padding:72px 0}
.section-dark{background:var(--ink-900);color:rgba(255,255,255,.86)}
.section-dark h2,.section-dark h3{color:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:48px}
.section-head .h2{margin-top:14px}
.section-lead{color:var(--text-600);font-size:16.5px;margin-top:16px;max-width:680px}
.section-dark .section-lead{color:rgba(255,255,255,.66)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--aurora-700);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--aurora-500);flex:none}
.section-dark .eyebrow{color:var(--aurora-500)}
.h1{font-size:clamp(38px,5.2vw,68px);line-height:1.08;letter-spacing:-.02em}
.h2{font-size:clamp(28px,3.4vw,44px);line-height:1.15;letter-spacing:-.015em}
.h3{font-size:20px;line-height:1.3}
.muted{color:var(--text-600)}
.hairline{height:1px;background:var(--line-200);border:0;margin:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;min-height:46px;padding:0 22px;
  border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-sm{height:40px;min-height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--aurora-500);color:#0E2A22;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--aurora-600);transform:translateY(-1px);box-shadow:var(--sh-3)}
.btn-primary:active{transform:translateY(0);background:var(--aurora-700);color:#fff}
.btn-ghost{background:transparent;border-color:rgba(23,19,37,.18);color:var(--text-900)}
.btn-ghost:hover{border-color:var(--text-900);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost:active{transform:translateY(0);background:rgba(23,19,37,.05)}
.btn-light{background:#fff;color:var(--ink-900);box-shadow:var(--sh-2)}
.btn-light:hover{transform:translateY(-1px);box-shadow:var(--sh-3)}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;transform:none;cursor:not-allowed}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--aurora-700);
}
.link-arrow::after{content:"→";transition:transform .24s var(--ease)}
.link-arrow:hover::after{transform:translateX(4px)}
.link-underline{position:relative;display:inline-block}
.link-underline::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.link-underline:hover::after{transform:scaleX(1)}

/* ============ 徽章与标签 ============ */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);background:rgba(47,207,168,.14);
  color:var(--aurora-700);font-size:12.5px;font-weight:600;letter-spacing:.01em;
}
.badge-purple{background:rgba(110,90,224,.12);color:#4B3BB0}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  border-radius:var(--r-pill);border:1px solid var(--line-200);
  background:#fff;color:var(--text-600);font-size:13.5px;
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.tag:hover{border-color:var(--aurora-500);color:var(--text-900)}
.tag.is-on{background:var(--ink-900);border-color:var(--ink-900);color:#fff}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line-200);box-shadow:0 6px 24px -18px rgba(23,19,37,.4)}
.nav{height:68px;display:flex;align-items:center;gap:20px}
.logo{display:inline-flex;align-items:center;gap:8px;flex:none}
.logo-mark{
  width:30px;height:30px;border-radius:9px;flex:none;
  background:linear-gradient(150deg,var(--ink-900),var(--ink-700));
  display:flex;align-items:center;justify-content:center;
}
.logo-mark span{width:9px;height:9px;border-radius:50%;background:var(--aurora-500);box-shadow:0 0 0 3px rgba(47,207,168,.22)}
.logo-text{display:flex;align-items:baseline;gap:6px}
.logo-main{font-family:var(--font-serif);font-size:19px;font-weight:700;letter-spacing:.01em;color:var(--text-900)}
.logo-tag{
  font-size:11px;font-weight:600;letter-spacing:.04em;
  color:var(--aurora-700);background:rgba(47,207,168,.14);
  padding:2px 7px;border-radius:6px;
}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:12px}
.nav-links a{
  position:relative;padding:8px 13px;border-radius:var(--r-sm);
  font-size:15px;color:var(--text-600);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.nav-links a:hover{color:var(--text-900);background:rgba(47,207,168,.08)}
.nav-links a.is-active{color:var(--text-900);font-weight:600}
.nav-links a.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:1px;height:2px;
  border-radius:2px;background:var(--aurora-500);
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:320px;height:40px;padding:0 8px 0 14px;
  border-radius:var(--r-pill);border:1px solid var(--line-200);
  background:#fff;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.command-search:focus-within{border-color:var(--aurora-500);box-shadow:0 0 0 4px rgba(47,207,168,.15)}
.command-search svg{flex:none;color:var(--text-400)}
.command-search input{
  flex:1;min-width:0;border:0;outline:none;background:transparent;
  font-size:14px;color:var(--text-900);
}
.command-search input::placeholder{color:var(--text-400)}
.kbd{
  flex:none;display:inline-flex;align-items:center;height:24px;padding:0 7px;
  border-radius:6px;border:1px solid var(--line-200);background:var(--sand-50);
  font-family:var(--font-mono);font-size:11.5px;color:var(--text-600);
}
.nav-quick{font-size:14.5px;color:var(--text-600);padding:6px 4px;white-space:nowrap}
.nav-quick:hover{color:var(--text-900)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-sm);
  border:1px solid var(--line-200);background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--text-900);border-radius:2px;transition:transform .24s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.mobile-nav{
  display:none;flex-direction:column;gap:2px;
  padding:10px 24px 22px;border-top:1px solid var(--line-200);
  background:rgba(255,255,255,.98);
}
.mobile-nav.is-open{display:flex}
.mobile-nav a{padding:12px 4px;font-size:16px;color:var(--text-900);border-bottom:1px solid var(--line-200)}
.mobile-nav a.is-active{color:var(--aurora-700);font-weight:600}
.mobile-nav .btn{margin-top:16px;width:100%}

/* ============ Hero ============ */
.hero{padding:72px 0 88px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(560px 320px at 12% 8%,rgba(47,207,168,.10),transparent 70%),
    radial-gradient(520px 300px at 88% 0%,rgba(110,90,224,.10),transparent 72%);
}
.hero .container{position:relative}
.hero-grid{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center}
.hero-copy{max-width:620px}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:6px 14px 6px 10px;border-radius:var(--r-pill);
  border:1px solid var(--line-200);background:#fff;
  font-size:13px;color:var(--text-600);box-shadow:var(--sh-1);
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--aurora-500);flex:none;box-shadow:0 0 0 3px rgba(47,207,168,.18)}
.hero h1{margin:24px 0 0}
.hero-sub{margin-top:22px;font-size:17.5px;line-height:1.85;color:var(--text-600);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.metrics{display:flex;gap:44px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line-200)}
.metric-num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(28px,3vw,38px);line-height:1.1;color:var(--text-900);letter-spacing:-.02em;
}
.metric-label{margin-top:6px;font-size:13.5px;color:var(--text-600)}
.hero-visual{position:relative}
.hero-visual::after{
  content:"";position:absolute;inset:-14px -14px auto auto;width:120px;height:120px;
  background-image:radial-gradient(rgba(47,207,168,.55) 1px,transparent 1px);
  background-size:12px 12px;opacity:.7;pointer-events:none;
}
.hero-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-200);box-shadow:var(--sh-3);background:#fff;
}
.hero-figure img{width:100%;aspect-ratio:4/3.2;object-fit:cover}
.hero-figure figcaption{
  position:absolute;left:16px;bottom:16px;
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:var(--r-pill);
  background:rgba(23,19,37,.72);color:#fff;font-size:12.5px;
  backdrop-filter:blur(6px);
}

/* ============ 信任条 ============ */
.trust{border-top:1px solid var(--line-200);border-bottom:1px solid var(--line-200);background:#fff}
.trust-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:18px 32px;padding:22px 0;
}
.trust-item{
  display:inline-flex;align-items:center;gap:9px;
  font-size:14px;color:var(--text-400);letter-spacing:.01em;
}
.trust-item i{width:5px;height:5px;border-radius:50%;background:var(--line-200);flex:none}

/* ============ 能力分组（编号行） ============ */
.feature-list{border-top:1px solid var(--line-200)}
.feature-row{
  display:grid;grid-template-columns:3fr 9fr;gap:32px;
  padding:30px 20px;border-bottom:1px solid var(--line-200);
  border-radius:0;
  transition:background-color .24s var(--ease);
}
.feature-row:hover{background:rgba(47,207,168,.055)}
.feature-no{
  font-family:var(--font-mono);font-size:13px;font-weight:600;
  color:var(--text-400);letter-spacing:.08em;
  transition:color .24s var(--ease);
}
.feature-row:hover .feature-no{color:var(--aurora-500)}
.feature-title{margin-top:10px;font-size:22px;line-height:1.35}
.feature-desc{margin-top:12px;color:var(--text-600);font-size:15px;line-height:1.8}
.feature-points{display:grid;grid-template-columns:1fr 1fr;gap:10px 28px;align-content:center}
.feature-points li{
  position:relative;padding-left:18px;font-size:15px;color:var(--text-600);line-height:1.75;
}
.feature-points li::before{
  content:"";position:absolute;left:0;top:11px;
  width:6px;height:6px;border-radius:2px;background:var(--aurora-500);
}

/* ============ 场景图文 ============ */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:56px 0}
.scene + .scene{border-top:1px solid var(--line-200)}
.scene-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-200);box-shadow:var(--sh-2);background:#fff;
}
.scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s var(--ease)}
.scene-media:hover img{transform:scale(1.02)}
.scene-body h3{font-size:26px;line-height:1.3}
.scene-body p{margin-top:16px;color:var(--text-600);font-size:15.5px;line-height:1.9}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.scene-points{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.scene-points li{position:relative;padding-left:20px;font-size:15px;color:var(--text-600)}
.scene-points li::before{
  content:"";position:absolute;left:0;top:10px;width:10px;height:10px;
  border-radius:50%;border:2px solid var(--aurora-500);
}
.scene.is-reverse .scene-media{order:2}

/* ============ 横滑案例卡 ============ */
.case-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.case-nav{display:flex;gap:10px}
.case-nav button{
  width:42px;height:42px;border-radius:50%;
  border:1px solid var(--line-dark);background:transparent;color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:16px;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.case-nav button:hover{background:rgba(47,207,168,.16);border-color:var(--aurora-500);transform:translateY(-1px)}
.case-track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:14px;margin:0 -4px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.case-track::-webkit-scrollbar{display:none}
.case-card{
  flex:0 0 clamp(280px,40%,440px);scroll-snap-align:start;
  background:var(--ink-800);border:1px solid var(--line-dark);
  border-radius:var(--r-md);padding:30px;
  display:flex;flex-direction:column;gap:22px;
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.case-card:hover{border-color:rgba(47,207,168,.4);transform:translateY(-2px)}
.case-quote{font-family:var(--font-serif);font-size:19px;line-height:1.65;color:#fff}
.case-stats{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding-top:20px;border-top:1px solid var(--line-dark)}
.case-stat-num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:26px;color:var(--aurora-500);line-height:1.2;
}
.case-stat-label{margin-top:4px;font-size:13px;color:rgba(255,255,255,.6)}
.case-client{font-size:13.5px;color:rgba(255,255,255,.55);margin-top:auto}

/* ============ 方案价格 ============ */
.plan-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.plan-card{
  background:#fff;border:1px solid var(--line-200);border-radius:var(--r-md);
  padding:34px;display:flex;flex-direction:column;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),transform .24s var(--ease);
}
.plan-card:hover{border-color:rgba(47,207,168,.4);box-shadow:var(--sh-3);transform:translateY(-2px)}
.plan-card.is-featured{border-color:var(--aurora-500);box-shadow:var(--sh-3)}
.plan-top{display:flex;align-items:center;justify-content:space-between;gap:16px}
.plan-name{font-size:21px;font-family:var(--font-serif);font-weight:700}
.plan-for{margin-top:10px;color:var(--text-600);font-size:14.5px}
.plan-price{
  margin:24px 0 4px;padding-bottom:24px;border-bottom:1px solid var(--line-200);
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:30px;color:var(--text-900);letter-spacing:-.01em;
}
.plan-price small{display:block;margin-top:6px;font-family:var(--font-sans);font-size:13.5px;color:var(--text-400);letter-spacing:0}
.plan-list{margin:24px 0 30px;display:flex;flex-direction:column;gap:13px}
.plan-list li{position:relative;padding-left:26px;font-size:15px;color:var(--text-600)}
.plan-list li::before{
  content:"";position:absolute;left:0;top:8px;width:14px;height:8px;
  border-left:1.5px solid var(--aurora-500);border-bottom:1.5px solid var(--aurora-500);
  transform:rotate(-45deg);
}
.plan-card .btn{width:100%;margin-top:auto}
.plan-custom{
  margin-top:28px;padding:22px 26px;border:1px dashed var(--line-200);border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:rgba(255,255,255,.6);
}
.plan-custom p{font-size:14.5px;color:var(--text-600);max-width:720px}

/* ============ 最新信息 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line-200);border-radius:var(--r-md);
  overflow:hidden;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),transform .24s var(--ease);
}
.news-card:hover{border-color:rgba(47,207,168,.4);box-shadow:var(--sh-3);transform:translateY(-3px)}
.news-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--sand-100)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-title{
  font-size:18px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-sum{
  font-size:14.5px;color:var(--text-600);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-time{margin-top:auto;font-size:13px;color:var(--text-400);font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.empty-state{
  border:1px solid var(--line-200);border-radius:var(--r-md);
  padding:56px 32px;text-align:center;background:#fff;
}
.empty-state p{color:var(--text-600);font-size:15.5px}
.empty-state .btn{margin-top:20px}

/* ============ FAQ ============ */
.faq{max-width:900px}
.faq-item{border-bottom:1px solid var(--line-200)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 4px;text-align:left;font-size:17px;font-weight:600;
  font-family:var(--font-serif);color:var(--text-900);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--aurora-700)}
.faq-icon{position:relative;width:20px;height:20px;flex:none}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--aurora-600);
  transform:translate(-50%,-50%);transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.faq-icon::before{width:14px;height:1.6px}
.faq-icon::after{width:1.6px;height:14px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .2s var(--ease)}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a p{padding:0 40px 26px 4px;font-size:15.5px;color:var(--text-600);line-height:1.9}

/* ============ 结尾 CTA ============ */
.cta-strip{background:var(--ink-900);padding:112px 0;position:relative;overflow:hidden}
.cta-strip::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(620px 320px at 50% 0%,rgba(47,207,168,.16),transparent 70%);
}
.cta-inner{position:relative;max-width:720px;margin:0 auto;text-align:center}
.cta-inner h2{color:#fff;font-size:clamp(28px,3.4vw,42px);line-height:1.2}
.cta-inner p{margin-top:18px;color:rgba(255,255,255,.66);font-size:16px}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:34px}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.66);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding-bottom:56px}
.footer-brand .logo-main{color:#fff;font-size:20px}
.footer-brand .logo-tag{background:rgba(47,207,168,.18);color:var(--aurora-500)}
.footer-brand .logo-mark{background:linear-gradient(150deg,rgba(255,255,255,.14),rgba(255,255,255,.04))}
.footer-brand p{margin-top:20px;font-size:14.5px;line-height:1.9;max-width:340px}
.footer-col h4{
  color:#fff;font-family:var(--font-sans);font-size:14px;font-weight:600;
  letter-spacing:.04em;margin-bottom:18px;
}
.footer-col li + li{margin-top:11px}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.66);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--aurora-500)}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:24px 0;display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13.5px;color:rgba(255,255,255,.45);
}
.footer-bottom a{color:rgba(255,255,255,.45)}
.footer-bottom a:hover{color:var(--aurora-500)}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .34s var(--ease),transform .34s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{transform:none;transition:opacity .2s linear}
  .btn,.news-card,.plan-card,.case-card,.scene-media img{transition:none}
  .btn:hover,.news-card:hover,.plan-card:hover,.case-card:hover{transform:none}
  .scene-media:hover img{transform:none}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 22px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{margin-left:4px}
  .command-search{width:260px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .section-sm{padding:60px 0}
  .nav-links,.command-search,.nav-quick{display:none}
  .nav-toggle{display:flex}
  .nav{height:60px}
  .hero{padding:52px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-copy{max-width:none}
  .metrics{gap:32px}
  .feature-row{grid-template-columns:1fr;gap:18px;padding:26px 12px}
  .feature-points{grid-template-columns:1fr}
  .scene{grid-template-columns:1fr;gap:32px;padding:44px 0}
  .scene.is-reverse .scene-media{order:0}
  .plan-grid{grid-template-columns:1fr}
  .case-card{flex:0 0 78%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .cta-strip{padding:80px 0}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-sm{padding:48px 0}
  body{font-size:16px}
  .h1{font-size:clamp(30px,8vw,40px)}
  .h2{font-size:clamp(24px,6.4vw,32px)}
  .hero h1{font-size:clamp(30px,8.4vw,42px)}
  .hero-sub{font-size:16px}
  .hero-actions{gap:12px}
  .hero-actions .btn{flex:1 1 auto}
  .metrics{
    gap:0;margin-top:34px;overflow-x:auto;padding-bottom:6px;
    scroll-snap-type:x mandatory;scrollbar-width:none;
  }
  .metrics::-webkit-scrollbar{display:none}
  .metric{flex:0 0 auto;min-width:132px;padding-right:26px;scroll-snap-align:start}
  .metric-num{font-size:28px}
  .section-head{flex-direction:column;align-items:flex-start;gap:18px;margin-bottom:32px}
  .scene-body h3{font-size:22px}
  .news-grid{grid-template-columns:1fr}
  .case-card{flex:0 0 86%;padding:24px}
  .plan-card{padding:26px}
  .plan-custom{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding-bottom:40px}
  .cta-strip{padding:64px 0}
  .cta-actions .btn{width:100%}
  .faq-q{font-size:16px;padding:20px 2px}
  .faq-a p{padding:0 0 22px 2px}
  .btn{min-height:48px;height:48px}
  .btn-sm{height:42px;min-height:42px}
}
@media (max-width:479px){
  .hero-badge{font-size:12.5px}
  .trust-inner{justify-content:flex-start;gap:14px 22px}
  .case-stats{grid-template-columns:1fr;gap:14px}
  .metric{min-width:120px}
}

/* roulang page: article */
:root{
  --ink-900:#171325;
  --ink-800:#1F1A2E;
  --sand-50:#F7F5F2;
  --white:#FFFFFF;
  --aurora-500:#2FCFA8;
  --aurora-600:#22B892;
  --aurora-700:#128A6E;
  --orbit-500:#6E5AE0;
  --text-900:#1C1826;
  --text-600:#6B6577;
  --text-400:#9A94A3;
  --line-200:#E6E2DB;
  --line-dark:rgba(255,255,255,.12);
  --error:#C8503F;
  --success:#2F9E6B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --r-btn:10px;
  --shadow-1:0 1px 2px rgba(23,19,37,.04);
  --shadow-2:0 12px 32px -12px rgba(23,19,37,.10);
  --shadow-3:0 18px 40px -14px rgba(23,19,37,.16);
  --ease:cubic-bezier(.22,1,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --mono:"SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
  --header-h:68px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--sand-50);
  color:var(--text-900);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text-900);}
p{margin:0;}
ul,ol{margin:0;}
ul{list-style:none;padding:0;}
input,button{font-size:inherit;}
:focus-visible{outline:2px solid var(--aurora-500);outline-offset:3px;border-radius:4px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.tabular{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,245,242,.94);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line-200);box-shadow:var(--shadow-1);}
.nav{display:flex;align-items:center;gap:28px;height:var(--header-h);}
.logo{display:flex;align-items:center;gap:10px;flex:none;}
.logo-mark{
  width:32px;height:32px;border-radius:10px;background:var(--ink-900);
  display:grid;place-items:center;position:relative;overflow:hidden;
}
.logo-mark::after{
  content:"";position:absolute;inset:-40%;
  background:radial-gradient(circle at 70% 30%,rgba(110,90,224,.5),transparent 60%);
}
.logo-mark span{
  width:9px;height:9px;border-radius:50%;background:var(--aurora-500);
  position:relative;z-index:1;box-shadow:0 0 0 3px rgba(47,207,168,.18);
}
.logo-text{display:flex;align-items:baseline;gap:7px;}
.logo-main{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--ink-900);letter-spacing:.01em;}
.logo-tag{
  font-size:11px;color:var(--text-600);border:1px solid var(--line-200);
  border-radius:999px;padding:2px 8px;background:var(--white);line-height:1.5;
}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:10px;}
.nav-links a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--text-600);transition:color .18s var(--ease);
}
.nav-links a:hover{color:var(--ink-900);}
.nav-links a.is-active{color:var(--ink-900);font-weight:600;}
.nav-links a.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;
  border-radius:2px;background:var(--aurora-500);
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px;}
.command-search{
  display:flex;align-items:center;gap:8px;width:320px;height:40px;padding:0 12px;
  background:var(--white);border:1px solid var(--line-200);border-radius:999px;
  color:var(--text-400);transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search:focus-within{border-color:var(--aurora-500);box-shadow:0 0 0 4px rgba(47,207,168,.16);}
.command-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--text-900);}
.command-search input::placeholder{color:var(--text-400);}
.kbd{
  font-size:11px;font-family:var(--mono);color:var(--text-600);
  border:1px solid var(--line-200);background:var(--sand-50);
  border-radius:6px;padding:1px 6px;flex:none;
}
.nav-quick{font-size:14px;color:var(--text-600);}
.link-underline{position:relative;}
.link-underline::after{
  content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;
  background:var(--aurora-500);transition:width .24s var(--ease);
}
.link-underline:hover::after{width:100%;}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-200);border-radius:10px;
  background:var(--white);cursor:pointer;padding:0;place-items:center;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--ink-900);border-radius:2px;margin:3px auto;transition:transform .2s var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(4.6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-4.6px) rotate(-45deg);}
.mobile-nav{
  display:none;flex-direction:column;gap:2px;
  padding:10px 24px 20px;border-top:1px solid var(--line-200);
  background:rgba(247,245,242,.98);
}
.mobile-nav.is-open{display:flex;}
.mobile-nav a{padding:12px 0;font-size:15px;color:var(--text-600);border-bottom:1px solid var(--line-200);}
.mobile-nav a:last-child{border-bottom:0;margin-top:10px;}
.mobile-nav a.is-active{color:var(--ink-900);font-weight:600;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-primary{background:var(--aurora-500);color:var(--ink-900);}
.btn-primary:hover{background:var(--aurora-600);transform:translateY(-1px);box-shadow:var(--shadow-3);}
.btn-primary:active{transform:translateY(0);background:var(--aurora-700);color:#fff;}
.btn-ghost{background:transparent;border-color:rgba(23,19,37,.18);color:var(--ink-900);box-shadow:none;}
.btn-ghost:hover{border-color:var(--ink-900);transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--aurora-700);background:none;border:0;padding:0;cursor:pointer;
}
.btn-text svg{transition:transform .2s var(--ease);}
.btn-text:hover svg{transform:translateX(3px);}

/* ---------- article hero ---------- */
.article-hero{
  padding:34px 0 42px;
  background:
    radial-gradient(1200px 420px at 12% -30%,rgba(110,90,224,.10),transparent 60%),
    radial-gradient(900px 380px at 88% -20%,rgba(47,207,168,.12),transparent 62%),
    var(--sand-50);
  border-bottom:1px solid var(--line-200);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-400);}
.breadcrumb a{color:var(--text-600);}
.breadcrumb a:hover{color:var(--aurora-700);}
.breadcrumb .sep{color:var(--text-400);}
.breadcrumb .current{color:var(--text-600);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:min(100%,520px);}
.article-head{margin-top:26px;max-width:900px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:999px;background:rgba(110,90,224,.10);color:var(--ink-800);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.article-head h1{
  font-family:var(--serif);
  font-size:clamp(28px,3.4vw,44px);
  line-height:1.2;letter-spacing:-.01em;
  margin:16px 0 0;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:20px;font-size:13.5px;color:var(--text-600);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--line-200);}
.meta-row .tabular{color:var(--text-900);font-weight:600;}

/* ---------- article layout ---------- */
.article-main{padding:56px 0 72px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start;}
.article-body{
  max-width:780px;font-size:17px;line-height:1.9;color:var(--text-900);
  word-break:break-word;
}
.article-body > * + *{margin-top:1.1em;}
.article-body h2{
  font-family:var(--serif);font-size:26px;line-height:1.35;
  margin:2.4em 0 .8em;padding-left:14px;border-left:3px solid var(--aurora-500);
  scroll-margin-top:100px;
}
.article-body h3{font-family:var(--serif);font-size:21px;line-height:1.4;margin:1.8em 0 .6em;}
.article-body h4{font-size:17px;margin:1.5em 0 .5em;}
.article-body p{margin:0;}
.article-body a{color:var(--aurora-700);border-bottom:1px solid rgba(47,207,168,.5);transition:border-color .2s var(--ease),color .2s var(--ease);}
.article-body a:hover{color:var(--aurora-700);border-bottom-color:var(--aurora-700);}
.article-body strong{font-weight:700;}
.article-body blockquote{
  margin:1.6em 0;padding:16px 22px;background:var(--white);
  border-left:2px solid var(--aurora-500);border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--text-600);box-shadow:var(--shadow-1);
}
.article-body ul,.article-body ol{padding-left:22px;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li + li{margin-top:.4em;}
.article-body li::marker{color:var(--aurora-600);}
.article-body img{border-radius:var(--r-md);border:1px solid var(--line-200);margin:1.6em 0 .6em;}
.article-body figure{margin:1.8em 0;}
.article-body figcaption{font-size:13px;color:var(--text-400);text-align:center;margin-top:4px;}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15px;display:block;overflow-x:auto;
  background:var(--white);border-radius:var(--r-md);border:1px solid var(--line-200);
}
.article-body th,.article-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line-200);}
.article-body tr:last-child td{border-bottom:0;}
.article-body th{font-weight:600;background:rgba(247,245,242,.8);}
.article-body pre{
  background:var(--ink-900);color:#EDEAF5;padding:18px 20px;border-radius:var(--r-md);
  overflow-x:auto;font-family:var(--mono);font-size:13.5px;line-height:1.7;
}
.article-body code{font-family:var(--mono);font-size:.92em;background:rgba(110,90,224,.10);padding:2px 6px;border-radius:5px;}
.article-body pre code{background:none;padding:0;color:inherit;}
.article-body hr{border:0;border-top:1px solid var(--line-200);margin:2.4em 0;}

/* ---------- aside ---------- */
.aside-card{
  background:var(--white);border:1px solid var(--line-200);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--shadow-1);
}
.aside-card + .aside-card{margin-top:20px;}
.aside-card h3{
  font-size:14px;letter-spacing:.04em;color:var(--text-600);font-weight:600;
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.aside-card h3::before{content:"";width:14px;height:2px;border-radius:2px;background:var(--aurora-500);}
.toc-sticky{position:sticky;top:calc(var(--header-h) + 24px);}
.toc-list li + li{margin-top:2px;}
.toc-list a{
  display:block;padding:7px 10px;border-left:2px solid transparent;border-radius:0 6px 6px 0;
  font-size:14px;color:var(--text-600);line-height:1.5;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.toc-list a:hover{background:var(--sand-50);color:var(--ink-900);}
.toc-list a.is-current{border-left-color:var(--aurora-500);background:rgba(47,207,168,.10);color:var(--ink-900);font-weight:600;}
.hot-list li{padding:14px 0;border-bottom:1px solid var(--line-200);}
.hot-list li:last-child{border-bottom:0;padding-bottom:0;}
.hot-list li:first-child{padding-top:0;}
.hot-list a{display:block;font-size:14.5px;line-height:1.6;color:var(--text-900);transition:color .18s var(--ease);}
.hot-list a:hover{color:var(--aurora-700);}
.hot-list span{display:block;margin-top:6px;font-size:12.5px;color:var(--text-400);}
.aside-cta{background:var(--ink-900);border-color:transparent;color:#fff;}
.aside-cta h3{color:rgba(255,255,255,.72);}
.aside-cta h3::before{background:var(--aurora-500);}
.aside-cta p{font-size:14px;line-height:1.7;color:rgba(255,255,255,.78);}
.aside-cta .btn{margin-top:16px;width:100%;}

/* ---------- article foot ---------- */
.article-foot{
  max-width:780px;margin-top:48px;padding-top:26px;border-top:1px solid var(--line-200);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;
}
.article-foot .btn-text{color:var(--text-600);}
.article-foot .btn-text:hover{color:var(--aurora-700);}
.empty-state{
  max-width:780px;padding:44px 32px;background:var(--white);
  border:1px dashed var(--line-200);border-radius:var(--r-md);text-align:center;
}
.empty-state h2{font-family:var(--serif);font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--text-600);font-size:15px;}
.empty-state .btn{margin-top:22px;}

/* ---------- related ---------- */
.related{padding:0 0 84px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.section-head h2{font-family:var(--serif);font-size:clamp(22px,2.4vw,30px);line-height:1.25;}
.section-head p{margin-top:8px;font-size:14.5px;color:var(--text-600);}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.related-card{
  display:flex;flex-direction:column;background:var(--white);
  border:1px solid var(--line-200);border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-3);border-color:rgba(47,207,168,.32);}
.related-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--ink-800);}
.related-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.related-card:hover .thumb img{transform:scale(1.04);}
.related-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.related-card h3{font-size:16.5px;line-height:1.55;}
.related-card p{font-size:14px;color:var(--text-600);line-height:1.7;}
.related-card .meta{margin-top:auto;font-size:12.5px;color:var(--text-400);}

/* ---------- cta ---------- */
.cta-strip{
  background:var(--ink-900);
  padding:96px 0;
  position:relative;overflow:hidden;
}
.cta-strip::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(760px 320px at 50% 0%,rgba(110,90,224,.30),transparent 65%);
}
.cta-inner{position:relative;max-width:720px;margin:0 auto;text-align:center;}
.cta-inner h2{font-family:var(--serif);color:#fff;font-size:clamp(24px,2.8vw,34px);line-height:1.3;}
.cta-inner p{margin-top:16px;color:rgba(255,255,255,.74);font-size:15.5px;}
.cta-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}
.cta-strip .btn-ghost{border-color:var(--line-dark);color:#fff;}
.cta-strip .btn-ghost:hover{border-color:var(--aurora-500);color:var(--aurora-500);}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.76);padding:64px 0 30px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .logo-mark{background:rgba(255,255,255,.10);}
.footer-brand .logo-main{color:#fff;}
.footer-brand .logo-tag{background:transparent;border-color:var(--line-dark);color:rgba(255,255,255,.65);}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:340px;}
.footer-col h4{font-size:14px;color:#fff;letter-spacing:.04em;margin-bottom:16px;}
.footer-col li{font-size:14px;line-height:1.9;color:rgba(255,255,255,.62);}
.footer-col a{color:rgba(255,255,255,.62);transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--aurora-500);}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .34s var(--ease),transform .34s var(--ease);}
[data-reveal].is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:36px;}
  .article-aside{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start;}
  .aside-card + .aside-card{margin-top:0;}
  .toc-sticky{position:static;}
}
@media (max-width:1023px){
  .nav-links,.command-search,.nav-quick{display:none;}
  .nav-toggle{display:grid;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  :root{--header-h:56px;}
  .container{padding:0 20px;}
  .article-hero{padding:24px 0 32px;}
  .article-main{padding:40px 0 56px;}
  .article-body{font-size:16px;}
  .article-body h2{font-size:22px;margin-top:2em;}
  .article-body table,.article-body pre{border-radius:var(--r-sm);}
  .article-aside{grid-template-columns:1fr;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .related-grid{grid-template-columns:1fr;}
  .related{padding-bottom:60px;}
  .cta-strip{padding:64px 0;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .logo-main{font-size:17px;}
}
@media (max-width:479px){
  .meta-row{gap:8px 14px;}
  .breadcrumb .current{max-width:180px;}
  .article-head h1{font-size:26px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  [data-reveal]{opacity:1 !important;transform:none !important;}
}

/* roulang page: category1 */
:root{
    --ink-900:#171325;
    --ink-800:#1F1A2E;
    --sand-50:#F7F5F2;
    --sand-100:#EFEBE4;
    --white:#FFFFFF;
    --aurora-500:#2FCFA8;
    --aurora-600:#22B894;
    --orbit-500:#6E5AE0;
    --text-900:#1C1826;
    --text-600:#6B6577;
    --text-400:#9A94A3;
    --line-200:#E6E2DB;
    --line-dark:rgba(255,255,255,.12);
    --error:#C8503F;
    --success:#2F9E6B;
    --r-sm:8px;
    --r-md:14px;
    --r-lg:18px;
    --r-btn:10px;
    --sh-1:0 1px 2px rgba(23,19,37,.04);
    --sh-2:0 12px 32px -12px rgba(23,19,37,.10);
    --sh-3:0 18px 40px -14px rgba(23,19,37,.16);
    --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,serif;
    --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    --container:1240px;
    --hd:68px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.85;color:var(--text-900);background:var(--sand-50);-webkit-font-smoothing:antialiased}
  img{max-width:100%;display:block;border:0}
  a{color:inherit;text-decoration:none}
  button,input{font-family:inherit;font-size:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  h1,h2,h3{font-family:var(--font-serif);font-weight:700;letter-spacing:-.01em}
  a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--aurora-500);outline-offset:2px;border-radius:4px}
  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
  .section{padding:96px 0}
  .section-tight{padding:64px 0}
  .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.06em;color:var(--aurora-600);text-transform:uppercase}
  .eyebrow::before{content:"";width:18px;height:1px;background:var(--aurora-500)}
  .section-head{max-width:760px;margin-bottom:44px}
  .section-head h2{font-size:clamp(26px,3.2vw,40px);line-height:1.2;margin:14px 0 14px}
  .section-head p{color:var(--text-600);font-size:16px}
  .link-underline{position:relative;font-size:14.5px;color:var(--text-600);transition:color .2s}
  .link-underline::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:1px;background:var(--aurora-500);transition:width .24s ease}
  .link-underline:hover{color:var(--text-900)}
  .link-underline:hover::after{width:100%}

  /* ---------- header ---------- */
  .site-header{position:sticky;top:0;z-index:80;background:rgba(247,245,242,.94);border-bottom:1px solid transparent;transition:border-color .2s ease,box-shadow .2s ease}
  .site-header.is-scrolled{border-bottom-color:var(--line-200);box-shadow:0 6px 24px -18px rgba(23,19,37,.4)}
  .nav{display:flex;align-items:center;gap:24px;height:var(--hd)}
  .logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
  .logo-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(140deg,var(--ink-800),var(--ink-900));display:grid;place-items:center;border:1px solid rgba(47,207,168,.35);flex:0 0 auto}
  .logo-mark span{display:block;width:9px;height:9px;background:var(--aurora-500);border-radius:2px;transform:rotate(45deg)}
  .logo-text{display:flex;align-items:baseline;gap:5px;line-height:1}
  .logo-main{font-size:17px;font-weight:700;letter-spacing:.01em}
  .logo-tag{font-size:11px;color:var(--aurora-600);border:1px solid rgba(47,207,168,.45);border-radius:6px;padding:2px 5px;letter-spacing:.02em}
  .nav-links{display:flex;align-items:center;gap:26px;margin-left:10px}
  .nav-links a{position:relative;display:inline-block;font-size:15px;color:var(--text-600);padding:6px 0;transition:color .2s ease}
  .nav-links a:hover{color:var(--text-900)}
  .nav-links a.is-active{color:var(--text-900);font-weight:600}
  .nav-links a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;background:var(--aurora-500)}
  .nav-right{margin-left:auto;display:flex;align-items:center;gap:16px}
  .command-search{display:flex;align-items:center;gap:8px;width:318px;height:38px;padding:0 12px;border:1px solid var(--line-200);border-radius:999px;background:var(--white);color:var(--text-400);transition:border-color .2s ease,box-shadow .2s ease}
  .command-search:focus-within{border-color:var(--aurora-500);box-shadow:0 0 0 4px rgba(47,207,168,.16)}
  .command-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--text-900)}
  .command-search input::placeholder{color:var(--text-400)}
  .kbd{font-size:11px;line-height:1;padding:4px 6px;border:1px solid var(--line-200);border-radius:6px;background:var(--sand-50);color:var(--text-400);white-space:nowrap}
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;white-space:nowrap}
  .btn-primary{background:var(--aurora-500);color:#10251F;box-shadow:var(--sh-1)}
  .btn-primary:hover{background:var(--aurora-600);transform:translateY(-1px);box-shadow:var(--sh-2)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{border-color:var(--ink-900);color:var(--ink-900);background:transparent}
  .btn-ghost:hover{background:var(--ink-900);color:#fff;transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-sm{height:38px;padding:0 16px;font-size:14px}
  .btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none}
  .nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line-200);border-radius:10px;background:var(--white);padding:0;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px}
  .nav-toggle span{display:block;width:16px;height:1.6px;background:var(--ink-900);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}
  .mobile-nav{max-height:0;overflow:hidden;transition:max-height .28s ease;background:var(--white);border-top:0 solid var(--line-200)}
  .mobile-nav.is-open{max-height:420px;border-top:1px solid var(--line-200)}
  .mobile-nav a{display:block;padding:14px 24px;font-size:15px;color:var(--text-600);border-bottom:1px solid var(--line-200)}
  .mobile-nav a.is-active{color:var(--text-900);font-weight:600}
  .mobile-nav .btn{width:calc(100% - 48px);margin:16px 24px;color:#10251F}

  /* ---------- page head ---------- */
  .page-head{padding:52px 0 44px;background:linear-gradient(180deg,#FFFFFF 0%,var(--sand-50) 100%);border-bottom:1px solid var(--line-200)}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-400)}
  .breadcrumb a{color:var(--text-600);transition:color .2s}
  .breadcrumb a:hover{color:var(--aurora-600)}
  .breadcrumb .sep{color:var(--text-400)}
  .breadcrumb .current{color:var(--text-900)}
  .page-head h1{font-size:clamp(30px,4.2vw,54px);line-height:1.14;margin:20px 0 18px;max-width:920px}
  .page-head .lede{max-width:760px;color:var(--text-600);font-size:16.5px}
  .head-stats{display:flex;flex-wrap:wrap;gap:44px;margin-top:34px;padding-top:26px;border-top:1px solid var(--line-200)}
  .head-stats .stat b{display:block;font-family:var(--font-serif);font-size:clamp(28px,3.4vw,40px);line-height:1.1;font-variant-numeric:tabular-nums}
  .head-stats .stat span{display:block;font-size:13.5px;color:var(--text-600);margin-top:6px}

  /* ---------- category layout ---------- */
  .cat-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:56px;align-items:start}
  .anchor-nav{position:sticky;top:calc(var(--hd) + 28px);border-left:1px solid var(--line-200);padding-left:20px}
  .anchor-nav .anchor-title{font-size:12px;letter-spacing:.08em;color:var(--text-400);margin-bottom:14px;text-transform:uppercase}
  .anchor-nav a{position:relative;display:block;padding:9px 0;font-size:14.5px;color:var(--text-600);transition:color .2s ease}
  .anchor-nav a:hover{color:var(--text-900)}
  .anchor-nav a.is-active{color:var(--text-900);font-weight:600}
  .anchor-nav a.is-active::before{content:"";position:absolute;left:-21px;top:50%;transform:translateY(-50%);width:2px;height:18px;border-radius:2px;background:var(--aurora-500)}

  /* ---------- entry rows ---------- */
  .entry-list{border-top:1px solid var(--line-200)}
  .entry-row{display:grid;grid-template-columns:88px minmax(0,1fr);gap:24px;padding:34px 22px 34px 20px;border-bottom:1px solid var(--line-200);border-radius:var(--r-md);transition:background .24s ease,box-shadow .24s ease}
  .entry-row:hover{background:var(--white);box-shadow:var(--sh-1)}
  .entry-no{font-family:var(--font-serif);font-size:30px;line-height:1.1;color:var(--text-400);font-variant-numeric:tabular-nums;transition:color .24s ease}
  .entry-row:hover .entry-no{color:var(--aurora-500)}
  .entry-body h3{font-size:21px;line-height:1.35;margin-bottom:10px}
  .entry-body>p{color:var(--text-600);max-width:780px}
  .entry-points{display:grid;gap:10px;margin-top:16px}
  .entry-points li{position:relative;padding-left:22px;font-size:15px;color:var(--text-900)}
  .entry-points li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;background:var(--aurora-500);transform:rotate(45deg)}

  /* ---------- scenes ---------- */
  .scene{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:60px 0;border-top:1px solid var(--line-200)}
  .scene:first-of-type{border-top:0;padding-top:8px}
  .scene-media img{width:100%;border-radius:var(--r-lg);border:1px solid var(--line-200);box-shadow:var(--sh-2)}
  .scene-body h3{font-size:clamp(21px,2.4vw,28px);line-height:1.3;margin-bottom:14px}
  .scene-body p{color:var(--text-600)}
  .scene.reverse .scene-media{order:2}
  .tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
  .tag{font-size:13px;line-height:1;padding:8px 13px;border-radius:999px;background:var(--sand-100);color:var(--ink-900);border:1px solid transparent;transition:border-color .2s ease,background .2s ease}
  .tag:hover{border-color:rgba(47,207,168,.5);background:#fff}
  .tag.is-solid{background:var(--ink-900);color:#fff}

  /* ---------- steps ---------- */
  .steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-top:44px}
  .step{background:var(--white);border:1px solid var(--line-200);border-radius:var(--r-md);padding:26px 24px;box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
  .step:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:rgba(47,207,168,.5)}
  .step-num{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;background:var(--sand-100);color:var(--ink-900);font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}
  .step h4{font-family:var(--font-serif);font-size:18px;margin:16px 0 8px}
  .step p{font-size:14.5px;color:var(--text-600)}

  /* ---------- note block ---------- */
  .note-block{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:start;background:var(--white);border:1px solid var(--line-200);border-radius:var(--r-lg);padding:44px;box-shadow:var(--sh-1)}
  .note-block h2{font-size:clamp(22px,2.6vw,30px);line-height:1.28;margin-bottom:14px}
  .note-block>div>p{color:var(--text-600)}
  .quote{border-left:2px solid var(--aurora-500);background:var(--sand-50);border-radius:0 var(--r-sm) var(--r-sm) 0;padding:18px 22px;color:var(--text-600);font-size:15px}
  .check-list{display:grid;gap:14px;margin-top:8px}
  .check-list li{position:relative;padding-left:28px;font-size:15px}
  .check-list li::before{content:"";position:absolute;left:0;top:6px;width:14px;height:14px;border-radius:4px;border:1px solid var(--aurora-500);background:linear-gradient(135deg,rgba(47,207,168,.25),rgba(47,207,168,0))}
  .check-list li::after{content:"";position:absolute;left:4.5px;top:9.5px;width:5px;height:8px;border-right:1.6px solid var(--aurora-600);border-bottom:1.6px solid var(--aurora-600);transform:rotate(40deg)}

  /* ---------- faq ---------- */
  .faq-list{max-width:900px;border-top:1px solid var(--line-200)}
  .faq-item{border-bottom:1px solid var(--line-200)}
  .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 0;background:none;border:0;text-align:left;cursor:pointer;font-size:17px;font-weight:600;color:var(--text-900);transition:color .2s ease}
  .faq-q:hover{color:var(--aurora-600)}
  .faq-icon{position:relative;flex:0 0 auto;width:22px;height:22px;border-radius:6px;border:1px solid var(--line-200);background:var(--white)}
  .faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--ink-900);transform:translate(-50%,-50%);transition:transform .2s ease,opacity .2s ease}
  .faq-icon::before{width:10px;height:1.6px}
  .faq-icon::after{width:1.6px;height:10px}
  .faq-item.is-open .faq-icon{border-color:var(--aurora-500);background:rgba(47,207,168,.12)}
  .faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease}
  .faq-item.is-open .faq-a{max-height:360px}
  .faq-a p{padding:0 52px 24px 0;color:var(--text-600);font-size:15.5px}

  /* ---------- cta ---------- */
  .cta-band{position:relative;background:var(--ink-900);color:#fff;padding:104px 0;margin-top:96px;overflow:hidden}
  .cta-band::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;opacity:.20}
  .cta-band::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(23,19,37,.92),rgba(31,26,46,.78))}
  .cta-inner{position:relative;z-index:2;max-width:720px;margin:0 auto;text-align:center}
  .cta-inner h2{color:#fff;font-size:clamp(26px,3.4vw,40px);line-height:1.2;margin-bottom:16px}
  .cta-inner p{color:rgba(255,255,255,.74);margin-bottom:30px}
  .cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px}
  .cta-band .btn-ghost{border-color:rgba(255,255,255,.5);color:#fff}
  .cta-band .btn-ghost:hover{background:#fff;color:var(--ink-900);border-color:#fff}

  /* ---------- footer ---------- */
  .site-footer{background:var(--ink-900);color:rgba(255,255,255,.76);padding:76px 0 32px}
  .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:44px}
  .footer-brand .logo-mark{border-color:rgba(255,255,255,.16)}
  .footer-brand .logo-main{color:#fff}
  .footer-brand .logo-tag{color:var(--aurora-500);border-color:rgba(47,207,168,.45)}
  .footer-brand p{margin-top:18px;font-size:14.5px;color:rgba(255,255,255,.66);max-width:380px}
  .footer-col h4{color:#fff;font-size:14.5px;font-family:var(--font-sans);margin-bottom:16px;letter-spacing:.02em}
  .footer-col li{font-size:14.5px;margin-bottom:11px;color:rgba(255,255,255,.66)}
  .footer-col a{color:rgba(255,255,255,.66);transition:color .2s ease}
  .footer-col a:hover{color:var(--aurora-500)}
  .footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;margin-top:52px;padding-top:24px;border-top:1px solid var(--line-dark);font-size:13px;color:rgba(255,255,255,.52)}

  /* ---------- reveal ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .34s cubic-bezier(.22,1,.36,1),transform .34s cubic-bezier(.22,1,.36,1)}
  .reveal.in{opacity:1;transform:none}

  @media (prefers-reduced-motion:reduce){
    .reveal{transform:none;transition:opacity .2s linear}
    *{animation:none !important}
  }

  /* ---------- responsive ---------- */
  @media (max-width:1180px){
    .nav-links{gap:18px}
    .command-search{width:230px}
    .cat-layout{gap:40px;grid-template-columns:200px minmax(0,1fr)}
  }
  @media (max-width:1024px){
    .section{padding:72px 0}
    .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
    .note-block{grid-template-columns:minmax(0,1fr);padding:34px}
  }
  @media (max-width:900px){
    .nav-links{display:none}
    .command-search{width:190px}
    .nav-quick{display:none}
    .nav-toggle{display:flex}
    .cat-layout{grid-template-columns:minmax(0,1fr);gap:28px}
    .anchor-nav{position:static;border-left:0;border-bottom:1px solid var(--line-200);padding:0 0 16px;display:flex;flex-wrap:wrap;gap:6px 18px}
    .anchor-nav .anchor-title{width:100%;margin-bottom:8px}
    .anchor-nav a{padding:6px 0}
    .anchor-nav a.is-active::before{display:none}
    .scene{grid-template-columns:minmax(0,1fr);gap:26px;padding:48px 0}
    .scene.reverse .scene-media{order:0}
    .footer-grid{grid-template-columns:1fr 1fr}
  }
  @media (max-width:768px){
    :root{--hd:58px}
    .container{padding:0 20px}
    .page-head{padding:38px 0 32px}
    .btn{min-height:48px}
    .btn-sm{min-height:38px}
    .head-stats{gap:28px}
  }
  @media (max-width:560px){
    .section{padding:56px 0}
    .entry-row{grid-template-columns:minmax(0,1fr);gap:8px;padding:26px 14px}
    .entry-no{font-size:22px}
    .steps{grid-template-columns:minmax(0,1fr)}
    .faq-q{font-size:16px}
    .faq-a p{padding-right:0}
    .footer-grid{grid-template-columns:minmax(0,1fr);gap:32px}
    .cta-band{padding:72px 0;margin-top:64px}
    .cta-actions .btn{width:100%}
    .head-stats .stat{min-width:44%}
  }

/* roulang page: category2 */
:root{
  --ink-900:#171325;
  --ink-800:#1F1A2E;
  --sand-50:#F7F5F2;
  --white:#FFFFFF;
  --aurora-500:#2FCFA8;
  --aurora-600:#22B894;
  --orbit-500:#6E5AE0;
  --text-900:#1C1826;
  --text-600:#6B6577;
  --text-400:#9A94A3;
  --line-200:#E6E2DB;
  --line-dark:rgba(255,255,255,.12);
  --err:#C8503F;
  --ok:#2F9E6B;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:18px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(23,19,37,.04), 0 12px 32px -12px rgba(23,19,37,.10);
  --shadow-2:0 18px 40px -14px rgba(23,19,37,.16);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",Georgia,"Times New Roman",serif;
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --font-mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--sand-50);
  color:var(--text-900);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:600;letter-spacing:-0.01em;color:var(--text-900)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--aurora-500);outline-offset:3px;border-radius:4px}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,242,.94);
  border-bottom:1px solid transparent;
  transition:border-color .28s var(--ease),background .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line-200);
  box-shadow:0 1px 0 rgba(23,19,37,.02), 0 8px 24px -18px rgba(23,19,37,.28);
}
.nav{display:flex;align-items:center;gap:28px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:28px;height:28px;border-radius:9px;
  background:linear-gradient(140deg,var(--ink-900) 0%,var(--orbit-500) 100%);
  display:inline-flex;align-items:center;justify-content:center;position:relative;overflow:hidden;
}
.logo-mark span{
  width:7px;height:7px;border-radius:50%;background:var(--aurora-500);
  box-shadow:0 0 0 3px rgba(47,207,168,.22);
}
.logo-text{display:flex;flex-direction:column;line-height:1.06}
.logo-main{font-family:var(--font-serif);font-size:17px;font-weight:600;letter-spacing:.01em}
.logo-tag{font-size:11px;color:var(--text-400);letter-spacing:.16em}
.nav-links{display:flex;align-items:center;gap:4px;margin-right:auto}
.nav-links li a{
  position:relative;display:inline-block;padding:9px 12px;border-radius:8px;
  font-size:14.5px;color:var(--text-600);
}
.nav-links li a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--aurora-500);transform:scaleX(0);transform-origin:left;transition:transform .28s var(--ease);
}
.nav-links li a:hover{color:var(--text-900);background:rgba(23,19,37,.04)}
.nav-links li a:hover::after,.nav-links li a.is-active::after{transform:scaleX(1)}
.nav-links li a.is-active{color:var(--text-900);font-weight:500}
.nav-right{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:310px;height:40px;padding:0 10px 0 14px;
  background:var(--white);border:1px solid var(--line-200);border-radius:var(--radius-pill);
  color:var(--text-400);transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.command-search:focus-within{border-color:var(--aurora-500);box-shadow:0 0 0 4px rgba(47,207,168,.14)}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--text-900);
}
.command-search input::placeholder{color:var(--text-400)}
.kbd{
  font-family:var(--font-mono);font-size:11px;line-height:1;padding:5px 7px;border-radius:6px;
  background:var(--sand-50);border:1px solid var(--line-200);color:var(--text-400);
}
.nav-quick{font-size:14.5px;color:var(--text-600)}
.link-underline{position:relative}
.link-underline::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:1px;background:var(--aurora-500);
  transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
}
.link-underline:hover{color:var(--text-900)}
.link-underline:hover::after{transform:scaleX(1)}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-200);border-radius:10px;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;background:var(--white);
}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--text-900);border-radius:2px;transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}
.mobile-nav{display:none;flex-direction:column;gap:2px;padding:10px 24px 22px;border-top:1px solid var(--line-200);background:var(--sand-50)}
.mobile-nav.is-open{display:flex}
.mobile-nav a{display:block;padding:13px 4px;font-size:15px;color:var(--text-600);border-bottom:1px solid var(--line-200)}
.mobile-nav a.is-active{color:var(--text-900);font-weight:600}
.mobile-nav .btn{margin-top:14px;border-bottom:0;justify-content:center}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:10px;
  font-size:15px;font-weight:500;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease);
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;border-radius:9px}
.btn-primary{background:var(--aurora-500);color:var(--ink-900);box-shadow:0 1px 2px rgba(23,19,37,.06),0 10px 24px -14px rgba(47,207,168,.75)}
.btn-primary:hover{background:var(--aurora-600);transform:translateY(-1px);box-shadow:0 18px 34px -16px rgba(47,207,168,.85)}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-ghost{background:transparent;border-color:rgba(23,19,37,.22);color:var(--text-900)}
.btn-ghost:hover{border-color:var(--text-900);background:rgba(23,19,37,.04);transform:translateY(-1px)}
.btn-light{background:var(--white);border-color:var(--line-200);color:var(--text-900)}
.btn-light:hover{border-color:var(--aurora-500);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;color:var(--text-900);min-height:auto;padding:0}
.btn-link svg{transition:transform .24s var(--ease)}
.btn-link:hover svg{transform:translateX(3px)}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--aurora-600);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--aurora-500)}
h2{font-size:clamp(28px,3.4vw,44px);line-height:1.15}
.section-head p{margin-top:16px;color:var(--text-600);font-size:16.5px;max-width:680px}
.lead{font-size:17px;color:var(--text-600)}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:22px 0 0;font-size:13.5px;color:var(--text-400)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line-200)}
.breadcrumb a{color:var(--text-600)}
.breadcrumb a:hover{color:var(--aurora-600)}
.breadcrumb [aria-current="page"]{color:var(--text-900)}

/* ---------- Hero banner ---------- */
.cat-hero{
  position:relative;margin-top:22px;border-radius:var(--radius-lg);overflow:hidden;
  background-image:linear-gradient(96deg,rgba(23,19,37,.94) 0%,rgba(23,19,37,.80) 46%,rgba(23,19,37,.56) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  border:1px solid var(--line-dark);
  box-shadow:var(--shadow-1);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle at 82% 22%,rgba(47,207,168,.30) 0,rgba(47,207,168,0) 42%),
    radial-gradient(circle at 66% 78%,rgba(110,90,224,.28) 0,rgba(110,90,224,0) 46%);
}
.cat-hero-inner{position:relative;z-index:2;padding:76px 56px 68px;max-width:820px}
.cat-hero .eyebrow{color:var(--aurora-500)}
.cat-hero .eyebrow::before{background:var(--aurora-500)}
.cat-hero h1{
  color:#fff;font-size:clamp(30px,4.4vw,54px);line-height:1.14;letter-spacing:-0.02em;
}
.cat-hero .hero-sub{
  margin-top:22px;color:rgba(255,255,255,.78);font-size:17px;line-height:1.9;max-width:640px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.cat-hero .btn-ghost{border-color:rgba(255,255,255,.32);color:#fff}
.cat-hero .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.pill-group{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}
.pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:var(--radius-pill);
  font-size:13.5px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);
  color:rgba(255,255,255,.88);
}
.pill::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--aurora-500)}
.hero-note{
  margin-top:14px;color:rgba(255,255,255,.62);font-size:13.5px;
}

/* ---------- 栏目说明 ---------- */
.intro-bar{
  margin-top:34px;padding:26px 30px;border-radius:var(--radius-md);
  background:var(--white);border:1px solid var(--line-200);box-shadow:var(--shadow-1);
  display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:start;
}
.intro-bar .mark{
  font-family:var(--font-serif);font-size:30px;line-height:1;color:var(--aurora-500);
}
.intro-bar p{color:var(--text-600);font-size:15.5px}

/* ---------- 卡片网格 ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.info-card{
  background:var(--white);border:1px solid var(--line-200);border-radius:var(--radius-md);
  padding:28px;box-shadow:var(--shadow-1);
  transition:border-color .28s var(--ease),transform .28s var(--ease),box-shadow .28s var(--ease);
}
.info-card:hover{border-color:rgba(47,207,168,.5);transform:translateY(-3px);box-shadow:var(--shadow-2)}
.info-card .num{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.12em;color:var(--text-400);
}
.info-card h3{margin:14px 0 10px;font-size:20px}
.info-card p{color:var(--text-600);font-size:15px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{
  display:inline-flex;align-items:center;padding:5px 11px;border-radius:var(--radius-pill);
  font-size:12.5px;background:var(--sand-50);border:1px solid var(--line-200);color:var(--text-600);
}
.tag.is-strong{background:var(--ink-900);border-color:var(--ink-900);color:#fff}

/* ---------- 交替图文 ---------- */
.split{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:56px;align-items:center;
}
.split+.split{margin-top:88px}
.split-media{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line-200);
  background:var(--white);box-shadow:var(--shadow-1);
  transition:box-shadow .32s var(--ease),transform .32s var(--ease);
}
.split-media:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.split-media img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.split-media.is-wide img{aspect-ratio:16/10}
.split-body h3{font-size:clamp(22px,2.4vw,30px);line-height:1.3;margin-bottom:16px}
.split-body p{color:var(--text-600)}
.point-list{margin-top:22px;display:grid;gap:12px}
.point-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--text-600)}
.point-list li::before{
  content:"";flex:0 0 auto;width:16px;height:16px;margin-top:7px;border-radius:50%;
  background:rgba(47,207,168,.16);
  box-shadow:inset 0 0 0 1px rgba(47,207,168,.6);
  background-image:linear-gradient(var(--aurora-600),var(--aurora-600));
  background-size:7px 1.6px;background-position:center;background-repeat:no-repeat;
}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:1px solid var(--line-200)}
.step{
  padding:30px 26px 26px;border-bottom:1px solid var(--line-200);
  border-right:1px solid var(--line-200);transition:background .28s var(--ease);
}
.step:last-child{border-right:0}
.step:hover{background:var(--white)}
.step .step-no{
  font-family:var(--font-mono);font-size:12.5px;color:var(--aurora-600);letter-spacing:.14em;
}
.step h3{font-size:19px;margin:14px 0 10px}
.step p{font-size:14.5px;color:var(--text-600)}

/* ---------- 数据指标 ---------- */
.metrics-band{
  background:var(--ink-900);color:#fff;border-radius:var(--radius-lg);
  padding:56px 48px;position:relative;overflow:hidden;
}
.metrics-band::after{
  content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,207,168,.22) 0,rgba(47,207,168,0) 68%);
}
.metrics{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px}
.metric .value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(34px,3.6vw,52px);line-height:1.05;color:var(--aurora-500);letter-spacing:-0.02em;
}
.metric .label{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.72);line-height:1.7}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line-200)}
.faq-item{border-bottom:1px solid var(--line-200)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 4px;text-align:left;font-family:var(--font-serif);font-size:19px;color:var(--text-900);
  transition:color .24s var(--ease);
}
.faq-q:hover{color:var(--aurora-600)}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:1px solid var(--line-200);
  display:inline-flex;align-items:center;justify-content:center;position:relative;
  transition:background .24s var(--ease),border-color .24s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--text-600);border-radius:2px;
  transition:transform .2s var(--ease),background .24s var(--ease);
}
.faq-icon::before{width:11px;height:1.6px}
.faq-icon::after{width:1.6px;height:11px}
.faq-item.is-open .faq-icon{background:var(--aurora-500);border-color:var(--aurora-500)}
.faq-item.is-open .faq-icon::before{background:var(--ink-900)}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);background:var(--ink-900)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .2s var(--ease);
}
.faq-a p{padding:0 56px 26px 4px;color:var(--text-600);font-size:15.5px}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--ink-900);color:#fff;border-radius:var(--radius-lg);
  padding:78px 32px;text-align:center;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;left:50%;top:-120px;transform:translateX(-50%);
  width:560px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(110,90,224,.35) 0,rgba(110,90,224,0) 70%);
}
.cta-inner{position:relative;z-index:2;max-width:680px;margin:0 auto}
.cta-band h2{color:#fff}
.cta-band p{margin-top:18px;color:rgba(255,255,255,.76);font-size:16.5px}
.cta-band .btn{margin-top:32px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.74);margin-top:96px;padding:72px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:44px}
.footer-brand .logo{margin-bottom:20px}
.footer-brand .logo-main{color:#fff}
.footer-brand .logo-tag{color:rgba(255,255,255,.5)}
.footer-brand p{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.66);max-width:400px}
.footer-col h4{font-family:var(--font-sans);font-size:14px;color:#fff;margin-bottom:18px;letter-spacing:.06em}
.footer-col ul{display:grid;gap:12px}
.footer-col li{font-size:14.5px;color:rgba(255,255,255,.66)}
.footer-col a:hover{color:var(--aurora-500)}
.footer-bottom{
  margin-top:52px;padding-top:24px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:rgba(255,255,255,.5);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .34s var(--ease),transform .34s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.06s}
.reveal[data-delay="2"]{transition-delay:.12s}
.reveal[data-delay="3"]{transition-delay:.18s}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .command-search{width:240px}
  .nav{justify-content:space-between}
  .nav-links{margin-right:0}
}
@media (max-width:1023px){
  .nav-links,.command-search,.nav-quick{display:none}
  .nav-toggle{display:flex}
  .section{padding:72px 0}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step:nth-child(2){border-right:0}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cat-hero-inner{padding:58px 34px 52px}
  .split{gap:38px}
  .split+.split{margin-top:64px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .nav{height:56px}
  .cat-hero-inner{padding:46px 24px 42px}
  .cat-hero h1{font-size:30px}
  .cat-hero .hero-sub{font-size:15.5px}
  .grid-2,.grid-4,.split,.steps,.metrics{grid-template-columns:1fr}
  .step{border-right:0}
  .intro-bar{grid-template-columns:1fr;gap:12px;padding:22px}
  .split+.split{margin-top:52px}
  .metrics-band{padding:40px 24px}
  .cta-band{padding:56px 22px}
  .faq-q{font-size:17px;padding:20px 2px}
  .faq-a p{padding:0 0 22px 2px}
  .footer-grid{grid-template-columns:1fr}
  .site-footer{padding:56px 0 26px;margin-top:64px}
  .btn{min-height:48px}
}
@media (max-width:520px){
  .cat-hero{border-radius:14px}
  .hero-actions .btn{width:100%}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto}
  .reveal{transform:none;transition:opacity .3s linear}
  .btn:hover,.info-card:hover,.split-media:hover{transform:none}
  .nav-links li a::after,.link-underline::after{transition:none}
}

/* roulang page: category3 */
:root{
  --ink-900:#171325;
  --ink-800:#1F1A2E;
  --sand-50:#F7F5F2;
  --white:#FFFFFF;
  --aurora-500:#2FCFA8;
  --aurora-600:#22B08F;
  --orbit-500:#6E5AE0;
  --text-900:#1C1826;
  --text-600:#6B6577;
  --text-400:#9A94A3;
  --line-200:#E6E2DB;
  --line-strong:#D5CFC6;
  --danger:#C8503F;
  --success:#2F9E6B;
  --radius-sm:8px;
  --radius-card:14px;
  --radius-lg:18px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(23,19,37,.04);
  --shadow-2:0 12px 32px -12px rgba(23,19,37,.10);
  --shadow-3:0 18px 40px -14px rgba(23,19,37,.16);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",SimSun,Georgia,serif;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text-900);
  background:var(--sand-50);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
h1,h2,h3,h4{font-family:var(--font-serif);margin:0;color:var(--text-900);letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--aurora-500);outline-offset:2px;border-radius:6px}
::selection{background:rgba(47,207,168,.28)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:64px 0}
.section-head{margin-bottom:44px;max-width:760px}
.section-head h2{font-size:clamp(28px,3.4vw,44px);line-height:1.15}
.section-head p{margin-top:14px;color:var(--text-600);font-size:17px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--orbit-500);
  text-transform:uppercase;font-family:var(--font-mono);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--orbit-500);opacity:.6}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,245,242,.94);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line-200);box-shadow:0 1px 2px rgba(23,19,37,.05)}
.nav{display:flex;align-items:center;gap:20px;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;border-radius:11px;background:var(--ink-900);
  display:grid;place-items:center;flex-shrink:0;
}
.logo-mark span{
  width:16px;height:16px;background:var(--aurora-500);display:block;
  clip-path:polygon(50% 0,61% 39%,100% 50%,61% 61%,50% 100%,39% 61%,0 50%,39% 39%);
  animation:starDrift 14s ease-in-out infinite;
}
@keyframes starDrift{0%,100%{transform:rotate(0deg) scale(1)}50%{transform:rotate(45deg) scale(.9)}}
.logo-text{display:flex;align-items:baseline;gap:6px}
.logo-main{font-family:var(--font-serif);font-size:18px;font-weight:700;color:var(--ink-900)}
.logo-tag{
  font-size:11px;letter-spacing:.06em;padding:3px 7px;border-radius:6px;
  background:rgba(110,90,224,.10);color:var(--orbit-500);line-height:1;
}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:14px}
.nav-links a{
  position:relative;display:inline-block;font-size:15px;color:var(--text-600);
  padding:6px 0;transition:color .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--aurora-500);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-links a:hover{color:var(--text-900)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--text-900);font-weight:600}
.nav-links a.is-active::after{transform:scaleX(1)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.command-search{
  display:flex;align-items:center;gap:9px;height:38px;padding:0 12px;
  min-width:300px;border:1px solid var(--line-200);border-radius:var(--radius-pill);
  background:var(--white);color:var(--text-400);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.command-search:focus-within{border-color:var(--aurora-500);box-shadow:0 0 0 4px rgba(47,207,168,.14)}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--text-900);
}
.command-search input::placeholder{color:var(--text-400)}
.kbd{
  font-family:var(--font-mono);font-size:11px;color:var(--text-400);
  border:1px solid var(--line-200);border-radius:6px;padding:1px 5px;line-height:1.4;
}
.nav-quick{font-size:14px;color:var(--text-600)}
.link-underline{position:relative;display:inline-block}
.link-underline::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.link-underline:hover{color:var(--aurora-600)}
.link-underline:hover::after{transform:scaleX(1)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line-200);align-items:center;justify-content:center;flex-direction:column;gap:4px}
.nav-toggle span{width:16px;height:1.6px;background:var(--ink-900);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}
.mobile-nav{display:none;border-top:1px solid var(--line-200);background:var(--white);padding:8px 24px 22px}
.mobile-nav.is-open{display:block}
.mobile-nav a{display:block;padding:13px 0;border-bottom:1px solid var(--line-200);font-size:15px;color:var(--text-900)}
.mobile-nav a.is-active{color:var(--aurora-600);font-weight:600}
.mobile-nav .btn{margin-top:18px;border-bottom:0}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{background:var(--aurora-500);color:#0E2A22;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--aurora-600);transform:translateY(-1px);box-shadow:var(--shadow-3)}
.btn-primary:active{transform:translateY(0);background:#1D9C7E}
.btn-ghost{border-color:rgba(23,19,37,.18);color:var(--ink-900);background:transparent}
.btn-ghost:hover{border-color:var(--ink-900);background:rgba(23,19,37,.04);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;
  color:var(--aurora-600);height:auto;padding:0;
}
.btn-text::after{content:"→";transition:transform .24s var(--ease)}
.btn-text:hover::after{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;line-height:1.5;padding:4px 10px;border-radius:var(--radius-pill);
  background:rgba(23,19,37,.05);color:var(--ink-900);
}
.badge--aurora{background:rgba(47,207,168,.16);color:#12715C}
.badge--orbit{background:rgba(110,90,224,.12);color:var(--orbit-500)}
.chip{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;
  border-radius:var(--radius-pill);border:1px solid var(--line-200);
  background:var(--white);color:var(--text-600);font-size:14px;
  transition:all .2s ease;
}
.chip:hover{border-color:var(--ink-900);color:var(--ink-900)}
.chip.is-active{background:var(--ink-900);border-color:var(--ink-900);color:#fff;font-weight:600}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-400);padding-top:28px}
.crumb a{color:var(--text-600)}
.crumb a:hover{color:var(--aurora-600)}
.crumb span.sep{color:var(--line-strong)}

/* ---------- 首屏 ---------- */
.hero{padding:34px 0 64px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-140px;right:-80px;width:420px;height:420px;
  background:radial-gradient(circle at center,rgba(110,90,224,.12),transparent 62%);
  pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;position:relative}
.hero h1{font-size:clamp(32px,4.4vw,52px);line-height:1.12;margin-top:6px}
.hero-sub{margin-top:20px;font-size:18px;line-height:1.8;color:var(--text-600);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-figure{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line-200);
  box-shadow:var(--shadow-2);background:var(--white);
}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.intro-note{
  margin-top:26px;padding:18px 20px;border-left:2px solid var(--aurora-500);
  background:rgba(255,255,255,.7);border-radius:0 var(--radius-card) var(--radius-card) 0;
  color:var(--text-600);font-size:15.5px;max-width:600px;
}

/* ---------- 筛选条 ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  background:var(--white);border:1px solid var(--line-200);border-radius:var(--radius-card);
  padding:16px 18px;box-shadow:var(--shadow-1);
}
.filter-search{
  display:flex;align-items:center;gap:9px;flex:1 1 260px;min-width:220px;
  height:42px;padding:0 16px;border:1px solid var(--line-200);
  border-radius:var(--radius-pill);background:var(--sand-50);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.filter-search:focus-within{border-color:var(--aurora-500);background:var(--white);box-shadow:0 0 0 4px rgba(47,207,168,.14)}
.filter-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14.5px}
.filter-chips{display:flex;flex-wrap:wrap;gap:10px}
.filter-hint{font-size:13.5px;color:var(--text-400);width:100%}

/* ---------- 数据条 ---------- */
.data-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line-200);border:1px solid var(--line-200);
  border-radius:var(--radius-card);overflow:hidden;margin-top:34px;
}
.data-cell{background:var(--white);padding:26px 24px}
.data-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(30px,3.4vw,42px);line-height:1.1;color:var(--ink-900)}
.data-num em{font-style:normal;font-size:16px;color:var(--text-400);margin-left:4px}
.data-label{margin-top:8px;font-size:14px;color:var(--text-600)}

/* ---------- 编号行 ---------- */
.rows{border-top:1px solid var(--line-200)}
.row-item{
  display:grid;grid-template-columns:64px 1fr;gap:24px;
  padding:30px 24px 30px 8px;border-bottom:1px solid var(--line-200);
  transition:background .24s ease;
}
.row-item:hover{background:var(--white)}
.row-num{
  font-family:var(--font-mono);font-size:14px;color:var(--text-400);padding-top:5px;
  transition:color .24s ease;
}
.row-item:hover .row-num{color:var(--aurora-500)}
.row-item h3{font-size:21px;line-height:1.4}
.row-item p{margin-top:10px;color:var(--text-600);font-size:16px;max-width:760px}
.row-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

/* ---------- 时间轴 ---------- */
.timeline{margin-top:8px}
.tl-item{position:relative;padding:0 0 42px 38px}
.tl-item::before{
  content:"";position:absolute;left:0;top:8px;width:11px;height:11px;border-radius:50%;
  background:var(--white);border:2px solid var(--aurora-500);
}
.tl-item:not(:last-child)::after{
  content:"";position:absolute;left:5px;top:26px;bottom:6px;width:1px;background:var(--line-200);
}
.tl-time{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;
  color:var(--text-400);margin-bottom:8px;
}
.tl-item h3{font-size:20px;line-height:1.45}
.tl-item p{margin-top:10px;color:var(--text-600);max-width:780px}
.tl-points{margin-top:14px;display:grid;gap:8px;max-width:780px}
.tl-points li{position:relative;padding-left:18px;font-size:15px;color:var(--text-600)}
.tl-points li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:rgba(47,207,168,.9);
}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;align-items:center}
.tl-item.is-hidden{display:none}
.empty-state{
  display:none;border:1px dashed var(--line-strong);border-radius:var(--radius-card);
  padding:40px 28px;text-align:center;background:var(--white);
}
.empty-state.is-visible{display:block}
.empty-state p{color:var(--text-600);margin-bottom:18px}

/* ---------- 交替图文 ---------- */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;margin-bottom:72px}
.scene:last-child{margin-bottom:0}
.scene-media{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line-200);box-shadow:var(--shadow-2)}
.scene-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.scene-body h3{font-size:26px;line-height:1.3}
.scene-body p{margin-top:14px;color:var(--text-600)}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.scene--reverse .scene-media{order:2}

/* ---------- 服务档位 ---------- */
.plan-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start}
.plan-card{
  background:var(--white);border:1px solid var(--line-200);border-radius:var(--radius-card);
  padding:34px 32px;box-shadow:var(--shadow-1);transition:box-shadow .25s ease,border-color .25s ease,transform .25s var(--ease);
}
.plan-card:hover{border-color:rgba(47,207,168,.5);box-shadow:var(--shadow-3);transform:translateY(-3px)}
.plan-card--dark{background:var(--ink-900);border-color:rgba(255,255,255,.12);color:#fff}
.plan-card--dark h3,.plan-card--dark .plan-price{color:#fff}
.plan-card--dark p,.plan-card--dark li{color:rgba(255,255,255,.74)}
.plan-card h3{font-size:23px}
.plan-price{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:38px;line-height:1.2;margin-top:16px;color:var(--ink-900)}
.plan-price em{font-style:normal;font-size:15px;color:var(--text-400);margin-left:6px}
.plan-card p{margin-top:12px;color:var(--text-600);font-size:15.5px}
.plan-list{margin-top:24px;display:grid;gap:12px}
.plan-list li{position:relative;padding-left:26px;font-size:15px;color:var(--text-600)}
.plan-list li::before{
  content:"";position:absolute;left:0;top:6px;width:14px;height:8px;
  border-left:1.5px solid var(--aurora-500);border-bottom:1.5px solid var(--aurora-500);
  transform:rotate(-45deg);
}
.plan-card .btn{margin-top:28px;width:100%}
.plan-note{
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  margin-top:20px;padding:20px 24px;border:1px dashed var(--line-strong);
  border-radius:var(--radius-card);background:rgba(255,255,255,.6);
}
.plan-note p{font-size:15px;color:var(--text-600)}
.plan-note strong{font-family:var(--font-serif);color:var(--text-900);font-size:17px;display:block;margin-bottom:4px}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line-200);margin-top:8px}
.faq-item{border-bottom:1px solid var(--line-200)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:22px;
  padding:24px 4px;text-align:left;font-family:var(--font-serif);font-size:17.5px;
  font-weight:600;color:var(--text-900);transition:color .2s ease;
}
.faq-q:hover{color:var(--aurora-600)}
.faq-icon{position:relative;width:18px;height:18px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--aurora-500);border-radius:2px;
  transition:transform .25s var(--ease),opacity .25s ease;
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-q[aria-expanded="true"] .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.faq-a-inner{padding:0 4px 26px;color:var(--text-600);max-width:820px;font-size:15.5px}

/* ---------- CTA ---------- */
.cta-band{background:var(--ink-900);color:#fff;padding:112px 0;text-align:center}
.cta-inner{max-width:720px;margin:0 auto}
.cta-band h2{color:#fff;font-size:clamp(26px,3vw,38px);line-height:1.25}
.cta-band p{margin-top:18px;color:rgba(255,255,255,.74);font-size:16.5px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:34px}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.3);color:#fff}
.cta-band .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.7);padding:76px 0 34px;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand .logo-main{color:#fff}
.footer-brand .logo-mark{background:#fff}
.footer-brand .logo-mark span{background:var(--ink-900)}
.footer-brand p{color:rgba(255,255,255,.62);line-height:1.9;max-width:380px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:12px}
.footer-col a,.footer-col li{color:rgba(255,255,255,.7)}
.footer-col a{transition:color .2s ease}
.footer-col a:hover{color:var(--aurora-500)}
.footer-bottom{
  margin-top:56px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  color:rgba(255,255,255,.5);font-size:13.5px;
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .34s var(--ease),transform .34s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.reveal.d1{transition-delay:.06s}
.reveal.d2{transition-delay:.12s}
.reveal.d3{transition-delay:.18s}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .nav-links{gap:18px;margin-left:6px}
  .nav-links a{font-size:14px}
  .command-search{min-width:220px}
  .nav-quick{display:none}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-figure{order:-1}
  .data-strip{grid-template-columns:repeat(2,1fr)}
  .plan-grid{grid-template-columns:1fr}
  .scene{grid-template-columns:1fr;gap:28px}
  .scene--reverse .scene-media{order:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:860px){
  .nav-links,.command-search{display:none}
  .nav-toggle{display:flex}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:56px 0}
  .section--tight{padding:44px 0}
  .container{padding:0 20px}
  .hero{padding:18px 0 44px}
  .hero h1{font-size:clamp(28px,7vw,36px)}
  .hero-sub{font-size:16.5px}
  .hero-actions .btn{flex:1 1 180px;min-height:48px}
  .row-item{grid-template-columns:40px 1fr;gap:14px;padding:24px 0 24px 4px}
  .row-item h3{font-size:19px}
  .tl-item{padding-left:30px}
  .tl-item::after{left:5px}
  .scene{margin-bottom:52px}
  .scene-body h3{font-size:22px}
  .plan-card{padding:28px 22px}
  .faq-q{font-size:16.5px;padding:20px 0}
  .cta-band{padding:76px 0}
  .cta-actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .data-strip{grid-template-columns:repeat(2,1fr)}
  .data-cell{padding:20px 16px}
  .filter-bar{padding:14px}
  .filter-search{flex:1 1 100%}
  .chip{height:34px;padding:0 14px;font-size:13.5px}
  .brand-note{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}