/* roulang page: index */
:root{
  --ink-900:#0B0F19;
  --ink-700:#1B2333;
  --brand-gold:#E5A23B;
  --brand-bronze:#C87A2B;
  --brand-grad:linear-gradient(135deg,#F3C27B 0%,#DD9C33 45%,#B5712A 100%);
  --bg-soft:#F6F4F0;
  --bg-card:#FFFFFF;
  --text-primary:#1F2633;
  --text-secondary:#5B6472;
  --text-on-dark:#E8EAF0;
  --shadow-sm:0 2px 8px rgba(31,38,51,0.06);
  --shadow-lg:0 8px 30px rgba(31,38,51,0.12);
  --radius-lg:24px;
  --radius-md:16px;
  --radius-btn:10px;
  --border-light:1px solid rgba(31,38,51,0.08);
  --font-stack:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --header-h:64px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--font-stack);
  background:var(--bg-soft);
  color:var(--text-primary);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  padding-bottom:70px;
}
body.no-scroll{overflow:hidden;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
ul,ol{padding:0;margin:0;list-style:none;}
h1,h2,h3,h4,h5,h6{margin:0;line-height:1.35;color:var(--text-primary);}
p{margin:0;}

.container{max-width:1200px;margin:0 auto;padding:0 24px;}

#skip-link{
  position:absolute;left:-9999px;top:0;background:#fff;color:var(--text-primary);
  padding:10px 18px;z-index:300;border-radius:0 0 10px 0;font-weight:600;
}
#skip-link:focus{left:0;}

:focus-visible{outline:2px solid var(--brand-gold);outline-offset:2px;}

/* ============ HEADER ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  height:var(--header-h);
  background:rgba(255,255,255,0.96);
  backdrop-filter:blur(14px);
  border-bottom:var(--border-light);
}
.navbar{
  height:var(--header-h);
  display:flex;align-items:center;gap:16px;
  max-width:1400px;margin:0 auto;padding:0 24px;
}
.brand{
  display:flex;align-items:center;gap:8px;
  flex-shrink:0;
}
.brand-logo{
  font-size:1.2rem;font-weight:800;letter-spacing:0.02em;
  background:var(--brand-grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.brand-badge{
  font-size:0.7rem;font-weight:700;
  color:var(--brand-bronze);
  background:#FBF1DF;
  border:1px solid rgba(229,162,59,0.6);
  padding:2px 9px;
  border-radius:20px;
  line-height:1.4;
}
.nav-search{
  flex:1;display:flex;justify-content:center;
}
.search-box{
  width:min(320px,100%);
  height:38px;
  border:1px solid rgba(31,38,51,0.14);
  border-radius:8px;
  background:#fff;
  padding:0 14px;
  font-size:0.9rem;
  transition:border-color 0.2s;
}
.search-box:focus{
  outline:none;
  border-color:rgba(229,162,59,0.7);
  box-shadow:0 0 0 3px rgba(229,162,59,0.15);
}
.nav-links{
  display:flex;align-items:center;gap:4px;
}
.nav-links a{
  padding:7px 13px;
  font-size:0.92rem;
  font-weight:500;
  color:var(--text-secondary);
  border-radius:8px;
  transition:background 0.2s,color 0.2s;
  white-space:nowrap;
}
.nav-links a:hover{
  background:var(--bg-soft);
  color:var(--text-primary);
}
.nav-links a.active{
  background:rgba(229,162,59,0.14);
  color:var(--brand-bronze);
  font-weight:600;
}
.nav-tools{
  display:flex;align-items:center;gap:8px;
}
.tool-select{
  height:32px;padding:0 10px;
  border:1px solid rgba(31,38,51,0.12);
  border-radius:6px;
  background:#fff;
  color:var(--text-primary);
  font-size:0.8rem;
  cursor:pointer;
}
.tool-select:focus-visible{outline:2px solid var(--brand-gold);outline-offset:2px;}
.menu-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid rgba(31,38,51,0.12);
  background:#fff;
  border-radius:10px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
}
.menu-toggle span{
  display:block;width:18px;height:2px;background:var(--text-primary);border-radius:2px;
}
.mobile-drawer{
  display:none;
  position:fixed;
  top:var(--header-h);left:0;right:0;bottom:0;
  background:var(--bg-card);
  z-index:99;
  padding:24px;
  flex-direction:column;
  gap:8px;
  box-shadow:0 20px 50px rgba(11,15,25,0.18);
}
.mobile-drawer.open{display:flex;}
.mobile-drawer a{
  padding:14px 16px;
  border-radius:12px;
  font-size:1.02rem;
  font-weight:500;
  background:var(--bg-soft);
  color:var(--text-primary);
}
.mobile-drawer a.active{
  background:rgba(229,162,59,0.14);
  color:var(--brand-bronze);
}

/* ============ HERO ============ */
.hero{
  position:relative;
  background-image:url('/assets/images/backpic/back-1.jpg');
  background-size:cover;
  background-position:center;
  padding:90px 0 100px;
  text-align:center;
  border-bottom:4px solid var(--brand-gold);
}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,15,30,0.88) 0%,rgba(10,15,30,0.72) 55%,rgba(10,15,30,0.62) 100%);
}
.hero-content{
  position:relative;z-index:2;
  display:flex;flex-direction:column;align-items:center;
  color:var(--text-on-dark);
}
.hero-event{
  display:inline-flex;align-items:center;gap:12px;
  background:rgba(255,255,255,0.1);
  border:1px solid rgba(255,255,255,0.22);
  backdrop-filter:blur(8px);
  padding:8px 16px;
  border-radius:40px;
  font-size:0.85rem;
  letter-spacing:0.03em;
  margin-bottom:26px;
  flex-wrap:wrap;
  justify-content:center;
}
.hero-event .event-dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--brand-gold);
  box-shadow:0 0 10px rgba(229,162,59,0.8);
}
.countdown-nums{
  display:inline-flex;gap:6px;font-weight:700;
  color:var(--brand-gold);
  font-variant-numeric:tabular-nums;
}
.hero h1{
  font-size:clamp(1.9rem,4vw,3.1rem);
  font-weight:800;
  line-height:1.25;
  color:#fff;
  max-width:900px;
  margin:0 0 22px;
  letter-spacing:0.01em;
}
.hero h1 .brand-text{
  background:linear-gradient(135deg,#fff 10%,#F3C27B 60%,#ddb15c 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}
.hero-sub{
  font-size:1.05rem;
  color:rgba(232,234,240,0.95);
  max-width:730px;
  line-height:1.9;
  margin-bottom:34px;
}
.hero-actions{
  display:flex;gap:16px;flex-wrap:wrap;justify-content:center;
  margin-bottom:44px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  padding:14px 30px;
  font-size:0.97rem;
  cursor:pointer;
  transition:box-shadow 0.2s,brightness 0.2s,background 0.2s,transform 0.15s;
}
.btn-primary{
  background:var(--brand-grad);
  color:#1F2633;
  box-shadow:0 6px 18px rgba(221,156,51,0.32);
}
.btn-primary:hover{
  filter:brightness(1.08);
  box-shadow:0 8px 24px rgba(221,156,51,0.45);
  transform:translateY(-2px);
}
.btn-ghost{
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.35);
  color:#F4F2EC;
}
.btn-ghost:hover{
  background:rgba(255,255,255,0.2);
  border-color:rgba(255,255,255,0.6);
  color:#fff;
}
.hero-metrics{
  display:flex;gap:16px;flex-wrap:wrap;justify-content:center;
  padding:0;
}
.metric-item{
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.16);
  border-radius:14px;
  padding:12px 26px;
  text-align:center;
  backdrop-filter:blur(6px);
}
.metric-item .num{
  display:block;
  font-size:1.7rem;font-weight:800;
  color:#F7C978;
  font-variant-numeric:tabular-nums;
}
.metric-item .label{
  font-size:0.8rem;color:rgba(232,234,240,0.8);
  letter-spacing:0.04em;
  margin-top:2px;
}

/* ============ SECTION BASE ============ */
.section{
  padding:clamp(60px,7vw,96px) 0;
}
.section-head{
  max-width:720px;
  margin-bottom:48px;
}
.section-head.center{
  margin-left:auto;margin-right:auto;text-align:center;
}
.section-tag{
  display:inline-block;
  background:rgba(229,162,59,0.12);
  color:var(--brand-bronze);
  font-size:0.8rem;font-weight:600;
  padding:5px 14px;
  border-radius:20px;
  margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(1.5rem,2vw,2rem);
  font-weight:700;
  line-height:1.4;
  margin-bottom:12px;
}
.section-head p{
  color:var(--text-secondary);
  font-size:0.96rem;
  line-height:1.85;
}

/* ============ FEATURES ============ */
.features{
  background:var(--bg-soft);
}
.features-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:26px;
}
.feature-card{
  background:var(--bg-card);
  border:var(--border-light);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform 0.2s ease,box-shadow 0.2s ease;
  display:flex;flex-direction:column;
}
.feature-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
}
.card-media{
  position:relative;
  height:180px;
  overflow:hidden;
}
.card-media img{
  width:100%;height:100%;object-fit:cover;
}
.card-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,15,25,0) 55%,rgba(11,15,25,0.35) 100%);
}
.data-badge{
  position:absolute;
  right:16px;bottom:14px;
  z-index:2;
  background:rgba(255,255,255,0.96);
  border:1px solid var(--brand-gold);
  color:var(--brand-bronze);
  font-size:0.78rem;font-weight:700;
  padding:4px 12px;
  border-radius:8px;
  box-shadow:0 2px 10px rgba(11,15,25,0.12);
  font-variant-numeric:tabular-nums;
}
.card-body{
  padding:26px 28px 30px;
  flex:1;
}
.card-body h3{
  font-size:1.16rem;font-weight:700;
  margin-bottom:10px;
}
.card-body p{
  color:var(--text-secondary);
  font-size:0.92rem;
  line-height:1.8;
}

/* ============ PLANS ============ */
.plans{
  background:linear-gradient(180deg,var(--bg-card) 0%,var(--bg-soft) 100%);
}
.plans-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  max-width:1080px;
  margin:0 auto;
}
.plan-card{
  background:var(--bg-card);
  border:var(--border-light);
  border-radius:var(--radius-lg);
  padding:34px 28px;
  position:relative;
  text-align:center;
  box-shadow:var(--shadow-sm);
  transition:transform 0.2s ease,box-shadow 0.2s ease;
}
.plan-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
}
.plan-card.recommended{
  border:2px solid var(--brand-gold);
  background:linear-gradient(180deg,#FFFDF8 0%,#FFF 100%);
}
.plan-label{
  position:absolute;
  top:-14px;left:50%;transform:translateX(-50%);
  background:var(--brand-grad);
  color:#1F2633;
  font-size:0.78rem;font-weight:700;
  padding:4px 18px;
  border-radius:20px;
  box-shadow:0 4px 12px rgba(221,156,51,0.35);
  white-space:nowrap;
}
.plan-name{
  font-size:1.12rem;font-weight:700;margin-bottom:8px;
}
.plan-desc{
  color:var(--text-secondary);
  font-size:0.85rem;
  margin-bottom:18px;
}
.plan-price{
  font-size:1.9rem;font-weight:800;
  color:var(--text-primary);
  margin-bottom:6px;
  font-variant-numeric:tabular-nums;
}
.plan-price span{
  font-size:0.9rem;font-weight:500;color:var(--text-secondary);
}
.plan-note{
  font-size:0.8rem;color:var(--text-secondary);
  margin-bottom:18px;
}
.plan-features{
  text-align:left;
  margin-bottom:24px;
}
.plan-features li{
  font-size:0.9rem;
  color:var(--text-primary);
  padding:6px 0 6px 26px;
  position:relative;
}
.plan-features li::before{
  content:"✓";
  position:absolute;left:2px;top:6px;
  color:var(--brand-bronze);
  font-weight:700;
}
.btn-block{width:100%;}
.btn-outline{
  background:transparent;
  border:1.5px solid var(--brand-gold);
  color:var(--brand-bronze);
}
.btn-outline:hover{
  background:rgba(229,162,59,0.1);
  box-shadow:0 4px 14px rgba(229,162,59,0.2);
}

/* ============ HOW IT WORKS ============ */
.how{
  background:var(--bg-soft);
}
.how-grid{
  display:grid;
  grid-template-columns:1fr 1.1fr;
  gap:48px;
  align-items:center;
}
.steps-list{
  display:flex;flex-direction:column;
  gap:0;
}
.step-item{
  display:flex;gap:18px;
  position:relative;
  padding-bottom:34px;
}
.step-item:last-child{
  padding-bottom:0;
}
.step-item::before{
  content:"";
  position:absolute;
  left:21px;top:48px;bottom:4px;
  width:2px;
  background:rgba(229,162,59,0.35);
}
.step-item:last-child::before{display:none;}
.step-num{
  width:44px;height:44px;
  flex-shrink:0;
  border:1px solid var(--brand-gold);
  color:var(--brand-bronze);
  background:#fff;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;
  font-size:1.05rem;
  box-shadow:0 0 0 6px rgba(229,162,59,0.1);
}
.step-body h3{
  font-size:1.1rem;font-weight:700;
  margin-bottom:6px;
}
.step-body p{
  color:var(--text-secondary);
  font-size:0.9rem;
  line-height:1.8;
}

/* Mockup window */
.mock-window{
  background:var(--ink-900);
  border-radius:var(--radius-lg);
  padding:0;
  box-shadow:0 24px 60px rgba(11,15,25,0.35);
  overflow:hidden;
}
.mock-top{
  display:flex;align-items:center;
  gap:8px;
  background:var(--ink-700);
  padding:14px 18px;
}
.mock-dot{
  width:11px;height:11px;border-radius:50%;
}
.mock-dot:nth-child(1){background:#F36C5F;}
.mock-dot:nth-child(2){background:#E5A23B;}
.mock-dot:nth-child(3){background:#43B581;}
.mock-url{
  margin-left:16px;
  background:rgba(255,255,255,0.08);
  color:rgba(232,234,240,0.7);
  font-size:0.78rem;
  border-radius:6px;
  padding:4px 16px;
  flex:1;
  text-align:center;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.mock-body{
  padding:26px;
  display:flex;flex-direction:column;
  gap:16px;
  min-height:330px;
}
.mock-sidebar{
  display:flex;gap:16px;
}
.mock-sidebar .mock-frame{
  width:36%;
  height:100px;
  background:rgba(255,255,255,0.06);
  border:1px dashed rgba(255,255,255,0.15);
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  color:rgba(255,255,255,0.35);
  font-size:0.8rem;
}
.mock-bars{
  flex:1;
  display:flex;flex-direction:column;gap:10px;
}
.mock-bar{
  height:12px;
  background:rgba(255,255,255,0.08);
  border-radius:6px;
}
.mock-bar:nth-child(1){width:88%;background:linear-gradient(90deg,#F3C27B 0%,rgba(243,194,123,0.25) 70%);}
.mock-bar:nth-child(2){width:70%;}
.mock-bar:nth-child(3){width:82%;}
.mock-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
}
.mock-grid .mock-frame{
  height:90px;
  background:rgba(255,255,255,0.055);
  border:1px dashed rgba(255,255,255,0.13);
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  color:rgba(255,255,255,0.3);
  font-size:0.75rem;
}
.mock-note{
  color:rgba(232,234,240,0.5);
  font-size:0.8rem;
  text-align:center;
  padding-top:6px;
  border-top:1px solid rgba(255,255,255,0.1);
  letter-spacing:0.02em;
}

/* ============ NEWS ============ */
.news{
  background:var(--bg-card);
}
.news-layout{
  display:grid;
  grid-template-columns:1.7fr 1fr;
  gap:40px;
}
.news-list li{
  border-bottom:1px solid rgba(31,38,51,0.07);
  padding:20px 0;
  display:flex;
  gap:18px;
  align-items:flex-start;
}
.news-list li:first-child{padding-top:0;}
.news-date{
  flex-shrink:0;
  background:var(--bg-soft);
  border:1px solid rgba(229,162,59,0.35);
  border-radius:10px;
  padding:8px 12px;
  text-align:center;
  min-width:62px;
}
.news-date .day{
  display:block;
  font-size:1.2rem;font-weight:800;
  color:var(--brand-bronze);
  line-height:1.1;
  font-variant-numeric:tabular-nums;
}
.news-date .month{
  font-size:0.72rem;
  color:var(--text-secondary);
}
.news-list h3{
  font-size:1rem;
  font-weight:600;
  line-height:1.55;
  margin-bottom:5px;
}
.news-list h3 a{
  transition:color 0.15s;
}
.news-list h3 a:hover{
  color:var(--brand-bronze);
}
.news-list p{
  font-size:0.86rem;
  color:var(--text-secondary);
  line-height:1.7;
}
.news-sidebar{
  background:var(--bg-soft);
  border:var(--border-light);
  border-radius:var(--radius-lg);
  padding:28px;
}
.news-sidebar h3{
  font-size:1.05rem;font-weight:700;
  margin-bottom:18px;
  position:relative;
  padding-left:16px;
}
.news-sidebar h3::before{
  content:"";
  position:absolute;left:0;top:5px;bottom:5px;
  width:4px;
  background:var(--brand-grad);
  border-radius:4px;
}
.side-recommend{
  margin-bottom:26px;
}
.side-recommend a{
  display:block;
  padding:12px 0;
  border-bottom:1px dashed rgba(31,38,51,0.1);
  color:var(--text-primary);
  font-size:0.92rem;
  line-height:1.6;
  transition:color 0.15s;
}
.side-recommend a:hover{color:var(--brand-bronze);}
.side-tags{
  display:flex;
  flex-wrap:wrap;gap:10px;
}
.side-tags a{
  background:#fff;
  border:1px solid rgba(31,38,51,0.1);
  padding:6px 14px;
  border-radius:20px;
  font-size:0.82rem;
  color:var(--text-secondary);
  transition:all 0.15s;
}
.side-tags a:hover{
  border-color:var(--brand-gold);
  color:var(--brand-bronze);
  background:rgba(229,162,59,0.06);
}

/* ============ SOCIAL PROOF ============ */
.proof{
  background:
    linear-gradient(0deg,rgba(11,15,25,0.93) 0%,rgba(11,15,25,0.82) 100%),
    url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  color:var(--text-on-dark);
}
.proof .section-head h2{color:#fff;}
.proof .section-head p{color:rgba(232,234,240,0.75);}
.proof .section-tag{
  background:rgba(229,162,59,0.2);
  color:#F3C27B;
}
.proof-metrics{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  margin-bottom:56px;
}
.proof-metric{
  background:rgba(255,255,255,0.07);
  border:1px solid rgba(255,255,255,0.14);
  border-radius:var(--radius-md);
  padding:26px 16px;
  text-align:center;
  backdrop-filter:blur(6px);
}
.proof-metric .pm-num{
  font-size:2rem;
  font-weight:800;
  color:#F3C27B;
  font-variant-numeric:tabular-nums;
}
.proof-metric .pm-label{
  font-size:0.85rem;
  color:rgba(232,234,240,0.75);
  margin-top:6px;
  white-space:nowrap;
}
.proof-list{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.proof-card{
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:var(--radius-lg);
  padding:26px 24px 22px;
}
.proof-card p{
  font-size:0.92rem;
  color:#E8EAF0;
  line-height:1.85;
  margin-bottom:18px;
}
.proof-user{
  display:flex;align-items:center;gap:12px;
}
.avatar{
  width:42px;height:42px;
  border-radius:50%;
  background:rgba(229,162,59,0.32);
  border:1px solid rgba(229,162,59,0.6);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;color:#F3C27B;
  overflow:hidden;
}
.avatar img{width:100%;height:100%;object-fit:cover;}
.proof-user .name{
  font-size:0.9rem;color:#fff;font-weight:600;
}
.proof-user .role{
  font-size:0.76rem;
  color:rgba(232,234,240,0.55);
}

/* ============ FORM ============ */
.contact{
  background:var(--bg-soft);
}
.contact-layout{
  display:grid;
  grid-template-columns:1.1fr 1.4fr;
  gap:44px;
  align-items:center;
}
.contact-info h2{
  font-size:clamp(1.5rem,2vw,2rem);
  margin-bottom:14px;
}
.contact-info p{
  color:var(--text-secondary);
  line-height:1.85;
  margin-bottom:24px;
}
.contact-info ul li{
  padding:10px 0;
  color:var(--text-primary);
  font-size:0.95rem;
  display:flex;align-items:center;gap:12px;
}
.contact-info ul li::before{
  content:"✓";
  width:24px;height:24px;
  background:rgba(229,162,59,0.15);
  color:var(--brand-bronze);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:0.8rem;font-weight:700;
  flex-shrink:0;
}
.form-card{
  background:var(--bg-card);
  border:var(--border-light);
  border-radius:var(--radius-lg);
  padding:32px 30px;
  box-shadow:var(--shadow-lg);
}
.form-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.form-group{
  margin-bottom:18px;
}
.form-group label{
  display:block;
  font-size:0.88rem;
  font-weight:600;
  margin-bottom:8px;
}
.form-group label .req{color:#C0392B;}
.form-control{
  width:100%;
  height:44px;
  border:1px solid rgba(31,38,51,0.15);
  border-radius:8px;
  background:#fff;
  padding:0 14px;
  font-size:0.92rem;
  transition:border-color 0.18s,box-shadow 0.18s;
}
textarea.form-control{
  height:auto;
  min-height:110px;
  padding:12px 14px;
  resize:vertical;
}
.form-control:focus{
  outline:none;
  border-color:rgba(229,162,59,0.8);
  box-shadow:0 0 0 3px rgba(229,162,59,0.14);
}
.form-tip{
  font-size:0.78rem;
  color:var(--text-secondary);
  line-height:1.6;
  margin-top:6px;
}
.form-note{
  font-size:0.78rem;
  color:var(--text-secondary);
  margin-top:14px;
  line-height:1.6;
}
.form-success{
  display:none;
  margin-top:14px;
  background:rgba(67,181,129,0.1);
  border:1px solid rgba(67,181,129,0.35);
  color:#27835B;
  border-radius:8px;
  padding:12px 16px;
  font-size:0.88rem;
}
.form-success.show{display:block;}
.form-btn{
  width:100%;
  margin-top:4px;
}

/* ============ FIXED CTA ============ */
.fixed-cta{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:90;
  background:rgba(11,15,25,0.94);
  backdrop-filter:blur(10px);
  border-top:1px solid rgba(229,162,59,0.35);
  transform:translateY(105%);
  transition:transform 0.3s ease;
  visibility:hidden;
  opacity:0;
  transition:transform 0.3s ease,visibility 0.3s,opacity 0.3s;
}
.fixed-cta.show{
  transform:translateY(0);
  visibility:visible;
  opacity:1;
}
.fixed-cta .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding-top:14px;
  padding-bottom:14px;
  flex-wrap:wrap;
}
.fixed-cta-text{
  color:#E8EAF0;
  font-size:0.95rem;
  font-weight:500;
  line-height:1.5;
}
.fixed-cta-text strong{
  color:#F3C27B;
  font-weight:700;
}
.fixed-cta .btn{
  padding:11px 26px;
  font-size:0.9rem;
  flex-shrink:0;
}

/* ============ FOOTER ============ */
.site-footer{
  background:var(--ink-900);
  color:rgba(232,234,240,0.7);
  padding:60px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:34px;
  padding-bottom:44px;
}
.footer-brand .brand-logo{
  font-size:1.35rem;
  -webkit-text-fill-color:transparent;
}
.footer-brand p{
  font-size:0.86rem;
  line-height:1.8;
  color:rgba(232,234,240,0.6);
  margin-top:14px;
  max-width:280px;
}
.footer-col h4{
  color:#fff;
  font-size:0.98rem;
  font-weight:600;
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  color:rgba(232,234,240,0.65);
  font-size:0.86rem;
  padding:6px 0;
  transition:color 0.15s,padding-left 0.15s;
}
.footer-col a:hover{
  color:#F3C27B;
  padding-left:4px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.09);
  padding:20px 0;
  text-align:center;
  font-size:0.82rem;
  color:rgba(232,234,240,0.45);
}

/* ============ RESPONSIVE ============ */
@media (max-width:1100px){
  .nav-search{display:none;}
  .nav-links a{padding:7px 10px;font-size:0.85rem;}
  .news-layout{grid-template-columns:1fr;}
  .contact-layout{grid-template-columns:1fr;}
}
@media (max-width:1024px){
  .features-grid{grid-template-columns:repeat(3,1fr);gap:16px;}
  .card-body{padding:22px;}
  .plans-grid{grid-template-columns:repeat(3,1fr);gap:16px;}
  .how-grid{grid-template-columns:1fr;gap:36px;}
  .proof-metrics{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:768px){
  body{padding-bottom:56px;}
  .nav-links,.nav-tools{display:none;}
  .menu-toggle{
    display:inline-flex;
    margin-left:auto;
  }
  .brand-badge{display:none;}
  .features-grid{grid-template-columns:1fr;}
  .plans-grid{grid-template-columns:1fr;max-width:480px;}
  .proof-list{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .hero{padding:70px 0 80px;text-align:center;}
  .hero-metrics{gap:10px;}
  .metric-item{padding:10px 18px;width:calc(50% - 10px);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section-head{margin-bottom:36px;}
  .fixed-cta-text{font-size:0.85rem;}
  .fixed-cta .btn{
    width:100%;
  }
}
@media (max-width:520px){
  .container{padding:0 18px;}
  .navbar{padding:0 16px;gap:10px;}
  .brand-logo{font-size:1.02rem;}
  .hero h1{font-size:1.68rem;}
  .hero-sub{font-size:0.95rem;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .proof-metrics{grid-template-columns:1fr 1fr;gap:12px;}
  .plan-card{padding:28px 20px;}
  .form-card{padding:24px 18px;}
  .news-date{display:none;}
  .news-list li{gap:0;}
  .metric-item .num{font-size:1.35rem;}
  .mock-body{padding:16px;}
  .mock-sidebar{flex-direction:column;}
  .mock-sidebar .mock-frame{width:100%;}
  .fixed-cta .container{flex-direction:column;text-align:center;}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --ink-900:#0B0F19;
  --ink-700:#1B2333;
  --brand-gold:#E5A23B;
  --brand-bronze:#C87A2B;
  --brand-grad:linear-gradient(135deg,#F3C27B 0%,#DD9C33 45%,#B5712A 100%);
  --bg-soft:#F6F4F0;
  --bg-card:#FFFFFF;
  --text-primary:#1F2633;
  --text-secondary:#5B6472;
  --text-on-dark:#E8EAF0;
  --shadow-sm:0 2px 8px rgba(31,38,51,0.06);
  --shadow-lg:0 8px 30px rgba(31,38,51,0.12);
  --radius-lg:24px;
  --radius-md:16px;
  --radius-btn:10px;
  --border-light:1px solid rgba(31,38,51,0.08);
  --font-stack:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --header-h:64px;
}
html,body{margin:0;padding:0;}
*{box-sizing:border-box;}
body{
  font-family:var(--font-stack);
  background:var(--bg-soft);
  color:var(--text-primary);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
:focus-visible{
  outline:2px solid var(--brand-gold);
  outline-offset:2px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  height:var(--header-h);
  background:rgba(255,255,255,0.96);
  backdrop-filter:blur(14px);
  border-bottom:var(--border-light);
}
.navbar{
  height:var(--header-h);
  display:flex;align-items:center;gap:16px;
  max-width:1400px;margin:0 auto;padding:0 24px;
}
.brand{display:flex;align-items:center;gap:8px;flex-shrink:0;}
.brand-logo{
  font-size:1.2rem;font-weight:800;letter-spacing:0.02em;
  background:var(--brand-grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.brand-badge{
  font-size:0.7rem;font-weight:700;
  color:var(--brand-bronze);
  background:#FBF1DF;
  border:1px solid rgba(229,162,59,0.6);
  padding:2px 9px;
  border-radius:20px;
  line-height:1.4;
}
.nav-search{flex:1;display:flex;justify-content:center;}
.search-box{
  width:min(320px,100%);
  height:38px;
  border:1px solid rgba(31,38,51,0.14);
  border-radius:8px;
  background:#fff;
  padding:0 14px;
  font-size:0.9rem;
  transition:border-color 0.2s;
}
.search-box:focus{
  outline:none;
  border-color:rgba(229,162,59,0.7);
  box-shadow:0 0 0 3px rgba(229,162,59,0.15);
}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-links a{
  padding:7px 13px;
  font-size:0.92rem;
  font-weight:500;
  color:var(--text-secondary);
  border-radius:8px;
  transition:background 0.2s,color 0.2s;
  white-space:nowrap;
}
.nav-links a:hover{background:var(--bg-soft);color:var(--text-primary);}
.nav-links a.active{
  background:rgba(229,162,59,0.14);
  color:var(--brand-bronze);
  font-weight:600;
}
.nav-tools{display:flex;align-items:center;gap:8px;}
.tool-select{
  height:32px;padding:0 10px;
  border:1px solid rgba(31,38,51,0.12);
  border-radius:6px;
  background:#fff;
  color:var(--text-primary);
  font-size:0.8rem;
  cursor:pointer;
}
.tool-select:focus-visible{outline:2px solid var(--brand-gold);outline-offset:2px;}
.menu-toggle{
  display:none;
  width:40px;height:40px;
  border:1px solid rgba(31,38,51,0.12);
  background:#fff;
  border-radius:10px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--text-primary);border-radius:2px;}
.mobile-drawer{
  display:none;
  position:fixed;
  top:var(--header-h);left:0;right:0;bottom:0;
  background:var(--bg-card);
  z-index:99;
  padding:24px;
  flex-direction:column;
  gap:8px;
  box-shadow:0 20px 50px rgba(11,15,25,0.18);
}
.mobile-drawer.open{display:flex;}
.mobile-drawer a{
  padding:14px 16px;
  border-radius:12px;
  font-size:1.02rem;
  font-weight:500;
  background:var(--bg-soft);
  color:var(--text-primary);
}
.mobile-drawer a.active{
  background:rgba(229,162,59,0.14);
  color:var(--brand-bronze);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  padding:13px 28px;
  font-size:0.95rem;
  cursor:pointer;
  transition:box-shadow 0.2s,brightness 0.2s,background 0.2s,transform 0.15s;
}
.btn-primary{
  background:var(--brand-grad);
  color:#1F2633;
  box-shadow:0 6px 18px rgba(221,156,51,0.32);
}
.btn-primary:hover{
  filter:brightness(1.08);
  box-shadow:0 8px 24px rgba(221,156,51,0.45);
  transform:translateY(-2px);
}
.btn-ghost{
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.35);
  color:#F4F2EC;
}
.btn-ghost:hover{
  background:rgba(255,255,255,0.2);
  border-color:rgba(255,255,255,0.6);
}
.btn-ghost-dark{
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.4);
  color:#F4F2EC;
}
.btn-ghost-dark:hover{
  background:rgba(255,255,255,0.2);
  border-color:rgba(255,255,255,0.7);
}
.btn-block{width:100%;}

/* ============ 文档布局 ============ */
.doc-layout{
  display:flex;
  gap:32px;
  align-items:flex-start;
  padding-top:36px;
  padding-bottom:80px;
}
.doc-sidebar{
  width:280px;
  flex-shrink:0;
  position:sticky;
  top:calc(var(--header-h) + 24px);
  max-height:calc(100vh - var(--header-h) - 48px);
  overflow-y:auto;
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  border:var(--border-light);
  box-shadow:var(--shadow-sm);
  padding:22px 16px;
}
.sidebar-current{
  background:var(--bg-soft);
  border-radius:12px;
  padding:14px 16px;
  margin-bottom:18px;
  border-left:3px solid var(--brand-gold);
}
.sidebar-current span{
  display:block;
  font-size:0.75rem;
  color:var(--text-secondary);
  letter-spacing:0.04em;
  margin-bottom:2px;
}
.sidebar-current strong{
  font-size:1rem;
  color:var(--text-primary);
}
.sidebar-title{
  font-size:0.8rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:0.06em;
  color:var(--text-secondary);
  padding:0 12px 10px;
}
.doc-nav{list-style:none;padding:0;margin:0;}
.doc-nav .nav-group{margin-bottom:14px;}
.doc-nav .nav-group-title{
  display:flex;align-items:center;gap:8px;
  font-size:0.8rem;font-weight:700;
  color:var(--text-secondary);
  letter-spacing:0.04em;
  padding:8px 12px 5px;
}
.doc-nav ul{list-style:none;padding:0;margin:0;}
.doc-nav a{
  display:block;
  padding:8px 12px;
  margin-left:8px;
  border-radius:10px;
  border-left:3px solid transparent;
  color:var(--text-secondary);
  font-size:0.9rem;
  transition:background 0.2s,color 0.2s;
}
.doc-nav a:hover{
  background:var(--bg-soft);
  color:var(--text-primary);
}
.doc-nav a.active{
  background:rgba(229,162,59,0.12);
  border-left-color:var(--brand-gold);
  color:var(--brand-bronze);
  font-weight:600;
}
.sidebar-card{
  margin-top:20px;
  background:var(--bg-soft);
  border-radius:var(--radius-md);
  padding:20px;
  border:1px dashed rgba(229,162,59,0.5);
}
.sidebar-card h4{
  margin:0 0 8px;
  font-size:1rem;
  color:var(--text-primary);
}
.sidebar-card p{
  margin:0 0 16px;
  font-size:0.85rem;
  color:var(--text-secondary);
  line-height:1.6;
}

.doc-main{
  flex:1;
  min-width:0;
}

/* ============ 页面横幅 ============ */
.page-banner{
  position:relative;
  background-image:url('/assets/images/backpic/back-2.jpg');
  background-size:cover;
  background-position:center;
  border-radius:var(--radius-lg);
  padding:42px 38px;
  overflow:hidden;
  margin-bottom:40px;
  box-shadow:var(--shadow-lg);
}
.banner-overlay{
  position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(11,15,25,0.93) 0%,rgba(11,15,25,0.75) 60%,rgba(11,15,25,0.65) 100%);
}
.banner-content{
  position:relative;z-index:2;
  color:var(--text-on-dark);
}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;
  gap:6px;
  font-size:0.85rem;
  color:rgba(232,234,240,0.75);
  margin-bottom:16px;
}
.breadcrumb a{color:var(--brand-gold);}
.breadcrumb a:hover{text-decoration:underline;}
.breadcrumb .sep{color:rgba(232,234,240,0.4);}
.banner-content h1{
  font-size:clamp(1.8rem,3vw,2.6rem);
  font-weight:800;
  line-height:1.25;
  margin:0 0 14px;
  color:#fff;
}
.banner-content h1 em{
  font-style:normal;
  background:linear-gradient(135deg,#fff 10%,#F3C27B 60%,#ddb15c 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}
.banner-content .lead{
  font-size:0.98rem;
  color:rgba(232,234,240,0.92);
  line-height:1.9;
  max-width:820px;
  margin:0 0 24px;
}
.stat-bar{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.stat-item{
  background:rgba(255,255,255,0.1);
  border:1px solid rgba(255,255,255,0.2);
  border-radius:12px;
  padding:10px 16px;
  min-width:116px;
  backdrop-filter:blur(6px);
}
.stat-item b{
  display:block;
  font-size:1.25rem;
  font-weight:800;
  color:#F3C27B;
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.stat-item span{
  font-size:0.78rem;
  color:rgba(232,234,240,0.7);
}

/* ============ 卡片区块 ============ */
.card-section{
  margin-bottom:48px;
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:22px;
  flex-wrap:wrap;
}
.section-head h2{
  margin:0;
  font-size:clamp(1.3rem,2vw,1.7rem);
  font-weight:700;
  color:var(--text-primary);
}
.section-head .section-note{
  font-size:0.85rem;
  color:var(--text-secondary);
}
.card-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:22px;
}
.feature-card{
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  border:var(--border-light);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform 0.2s ease,box-shadow 0.2s ease;
  display:flex;
  flex-direction:column;
}
.feature-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
}
.card-cover{
  position:relative;
  height:158px;
  overflow:hidden;
}
.card-cover img{
  width:100%;height:100%;
  object-fit:cover;
}
.card-cover::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,15,25,0) 40%,rgba(11,15,25,0.3) 100%);
}
.card-badge{
  position:absolute;
  top:14px;right:14px;
  z-index:2;
  background:rgba(255,255,255,0.94);
  color:var(--brand-bronze);
  font-size:0.76rem;
  font-weight:700;
  padding:4px 12px;
  border-radius:20px;
  box-shadow:0 2px 8px rgba(11,15,25,0.16);
  backdrop-filter:blur(4px);
  letter-spacing:0.02em;
}
.card-body{
  padding:20px 20px 18px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.card-body h3{
  margin:0 0 8px;
  font-size:1.1rem;
  font-weight:700;
  color:var(--text-primary);
}
.card-body p{
  margin:0 0 16px;
  font-size:0.89rem;
  color:var(--text-secondary);
  line-height:1.7;
  flex:1;
}
.card-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:12px;
  border-top:1px dashed rgba(31,38,51,0.1);
  font-size:0.8rem;
  color:var(--text-secondary);
}
.card-link{
  color:var(--brand-bronze);
  font-weight:600;
  transition:color 0.2s;
}
.card-link:hover{text-decoration:underline;color:var(--brand-gold);}

/* ============ 分页器 ============ */
.pagination{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  margin-top:36px;
  flex-wrap:wrap;
}
.pagination button,.pagination .page-num{
  min-width:38px;
  height:38px;
  border-radius:10px;
  border:1px solid rgba(31,38,51,0.12);
  background:#fff;
  color:var(--text-primary);
  font-weight:500;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0 10px;
  transition:all 0.2s;
}
.pagination .active{
  background:var(--brand-grad);
  border-color:transparent;
  color:var(--ink-900);
  font-weight:700;
}
.pagination button:hover:not(.active){
  border-color:var(--brand-gold);
  color:var(--brand-bronze);
  background:#FBF1DF;
}
.pagination .dots{
  color:var(--text-secondary);
  padding:0 4px;
}

/* ============ 适用场景与流程 ============ */
.usage-block{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  margin-bottom:48px;
}
.usage-panel{
  background:var(--bg-card);
  border-radius:var(--radius-lg);
  border:var(--border-light);
  padding:28px;
  box-shadow:var(--shadow-sm);
}
.usage-panel h2{
  margin:0 0 18px;
  font-size:1.3rem;
  font-weight:700;
}
.scene-list{
  list-style:none;
  padding:0;
  margin:0;
}
.scene-list li{
  padding:14px 0;
  border-bottom:1px dashed rgba(31,38,51,0.1);
  display:flex;
  align-items:flex-start;
  gap:12px;
}
.scene-list li:last-child{
  border-bottom:none;
  padding-bottom:0;
}
.scene-list .ico{
  width:36px;
  height:36px;
  flex-shrink:0;
  border-radius:10px;
  background:var(--bg-soft);
  border:1px solid rgba(229,162,59,0.5);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:0.82rem;
  font-weight:700;
  color:var(--brand-bronze);
}
.scene-list strong{
  display:block;
  font-size:0.95rem;
  color:var(--text-primary);
}
.scene-list span{
  font-size:0.84rem;
  color:var(--text-secondary);
  line-height:1.6;
}
.steps-list{
  list-style:none;
  padding:0;
  margin:0;
}
.steps-list li{
  display:flex;
  align-items:flex-start;
  gap:14px;
  padding:0 0 24px;
  position:relative;
}
.steps-list li:last-child{padding-bottom:0;}
.steps-list li:not(:last-child)::before{
  content:'';
  position:absolute;
  left:21px;
  top:44px;
  bottom:4px;
  width:1px;
  background:linear-gradient(180deg,rgba(229,162,59,0.5),rgba(229,162,59,0.06));
}
.step-num{
  width:44px;
  height:44px;
  flex-shrink:0;
  border-radius:50%;
  border:1px solid var(--brand-gold);
  background:#FBF1DF;
  color:var(--brand-bronze);
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:0.92rem;
  font-variant-numeric:tabular-nums;
}
.steps-list p{
  margin:0;
  font-size:0.9rem;
  color:var(--text-secondary);
  line-height:1.65;
  padding-top:4px;
}
.steps-list p strong{
  display:block;
  color:var(--text-primary);
  font-size:0.98rem;
  margin-bottom:2px;
}

/* ============ FAQ ============ */
.faq-section{
  margin-bottom:48px;
}
.faq-section .section-title{
  font-size:1.3rem;
  font-weight:700;
  margin:0 0 18px;
}
.faq-item{
  background:var(--bg-card);
  border:var(--border-light);
  border-radius:var(--radius-md);
  margin-bottom:12px;
  overflow:hidden;
  transition:box-shadow 0.2s;
}
.faq-item:hover{
  box-shadow:var(--shadow-sm);
}
.faq-item summary{
  padding:18px 22px;
  font-weight:600;
  font-size:0.97rem;
  cursor:pointer;
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:'+';
  font-size:1.5rem;
  font-weight:400;
  color:var(--brand-gold);
  transition:transform 0.2s;
  line-height:1;
  flex-shrink:0;
}
.faq-item[open] summary::after{
  content:'−';
  color:var(--brand-bronze);
}
.faq-item p{
  margin:0;
  padding:0 22px 20px;
  font-size:0.9rem;
  color:var(--text-secondary);
  line-height:1.8;
}

/* ============ CTA ============ */
.cta-block{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  background-image:url('/assets/images/backpic/back-3.jpg');
  background-size:cover;
  background-position:center;
  padding:56px 48px;
  box-shadow:var(--shadow-lg);
}
.cta-overlay{
  position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(11,15,25,0.93) 0%,rgba(11,15,25,0.78) 100%);
}
.cta-content{
  position:relative;
  z-index:2;
  color:var(--text-on-dark);
  text-align:center;
}
.cta-content h2{
  margin:0 0 12px;
  font-size:clamp(1.4rem,2.4vw,1.9rem);
  font-weight:700;
  color:#fff;
}
.cta-content p{
  margin:0 auto 28px;
  max-width:560px;
  color:rgba(232,234,240,0.9);
  font-size:0.97rem;
  line-height:1.7;
}
.cta-actions{
  display:flex;
  gap:14px;
  justify-content:center;
  flex-wrap:wrap;
}

/* ============ 移动端文档目录 ============ */
.mobile-doc-nav{
  display:none;
  margin-bottom:20px;
}
.mobile-doc-nav summary{
  display:flex;
  align-items:center;
  gap:8px;
  background:var(--bg-card);
  border:var(--border-light);
  border-radius:12px;
  padding:14px 18px;
  font-weight:600;
  cursor:pointer;
  list-style:none;
  color:var(--text-primary);
}
.mobile-doc-nav summary::-webkit-details-marker{display:none;}
.mobile-doc-nav summary::after{
  content:'⌄';
  margin-left:auto;
  font-size:1.1rem;
  color:var(--brand-gold);
  transition:transform 0.2s;
}
.mobile-doc-nav[open] summary::after{
  transform:rotate(180deg);
}
.mobile-doc-nav .doc-nav{
  margin-top:10px;
  background:var(--bg-card);
  border-radius:12px;
  padding:12px;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-900);
  color:rgba(232,234,240,0.7);
  padding:64px 0 0;
  margin-top:20px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand-logo{
  font-size:1.3rem;
  font-weight:800;
  background:var(--brand-grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  display:inline-block;
  margin-bottom:14px;
}
.footer-brand p{
  font-size:0.89rem;
  line-height:1.8;
  max-width:320px;
  margin:0;
}
.footer-col h4{
  color:#fff;
  font-size:0.9rem;
  font-weight:600;
  margin:0 0 14px;
  letter-spacing:0.03em;
}
.footer-col a{
  display:block;
  padding:5px 0;
  color:rgba(232,234,240,0.6);
  font-size:0.87rem;
  transition:color 0.2s;
}
.footer-col a:hover{
  color:var(--brand-gold);
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.08);
  padding:20px 0;
  font-size:0.82rem;
  color:rgba(232,234,240,0.45);
  text-align:center;
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-tools{display:none;}
  .nav-search{display:none;}
  .menu-toggle{display:flex;}
  .doc-layout{
    flex-direction:column;
    gap:20px;
  }
  .doc-sidebar{display:none;}
  .mobile-doc-nav{display:block;}
  .card-grid{
    grid-template-columns:repeat(2,1fr);
    gap:16px;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }
}
@media (max-width:767px){
  .doc-layout{padding-top:24px;padding-bottom:60px;}
  .mobile-doc-nav summary{font-size:0.95rem;}
  .page-banner{
    padding:30px 22px;
    border-radius:18px;
  }
  .page-banner h1{
    font-size:1.55rem;
  }
  .page-banner .lead{
    font-size:0.9rem;
  }
  .stat-bar{
    gap:8px;
  }
  .stat-item{
    min-width:calc(50% - 4px);
    padding:8px 12px;
  }
  .card-grid{
    grid-template-columns:1fr;
  }
  .card-cover{
    height:168px;
  }
  .usage-block{
    grid-template-columns:1fr;
    gap:16px;
  }
  .usage-panel{
    padding:22px;
  }
  .cta-block{
    padding:40px 22px;
    border-radius:18px;
  }
  .cta-content h2{
    font-size:1.3rem;
  }
  .btn{
    width:100%;
    padding:13px 20px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
  }
  .site-footer{
    padding-top:44px;
  }
  .footer-bottom{
    text-align:left;
    padding:18px 0;
  }
}