/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --ink-900:#0B0D0E;
  --ink-800:#14181A;
  --ink-700:#1F2528;
  --ink-500:#5A6469;
  --ink-300:#9AA4A8;
  --line:rgba(11,13,14,.10);
  --line-strong:rgba(11,13,14,.24);
  --paper:#F6F5F1;
  --paper-2:#ECEAE4;
  --brand:#C8F135;
  --brand-dark:#AED61F;
  --brand-deep:#17453A;
  --accent:#FF6A2B;
  --radius:14px;
  --radius-lg:18px;
  --shadow-hover:0 12px 32px rgba(11,13,14,.10);
  --ease:cubic-bezier(.2,.8,.2,1);
  --nav-h:76px;
}

/* ============ Reset / Base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{background:none;border:0;padding:0}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
::selection{background:var(--brand);color:var(--ink-900)}

.container{width:min(1280px,100% - 64px);margin-inline:auto}
@media (max-width:1023px){.container{width:min(960px,100% - 48px)}}
@media (max-width:767px){.container{width:calc(100% - 40px)}}

.section{padding:110px 0}
.section--alt{background:var(--paper-2)}
@media (max-width:1023px){.section{padding:76px 0}}
@media (max-width:767px){.section{padding:56px 0}}

/* ============ 排版 ============ */
h1{font-size:clamp(34px,5.2vw,66px);line-height:1.06;font-weight:800;letter-spacing:-.01em}
h2{font-size:clamp(26px,3vw,40px);line-height:1.15;font-weight:750}
h3{font-size:clamp(19px,1.6vw,23px);line-height:1.3;font-weight:650}
h4{font-size:17px;line-height:1.4;font-weight:600}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;font-weight:700;color:var(--brand-deep);
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);display:block}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{margin-bottom:14px}
.section-sub{color:var(--ink-500);font-size:16.5px;line-height:1.85}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;max-width:none}
@media (max-width:767px){
  .section-head--row{flex-direction:column;align-items:flex-start;gap:16px}
  .section-head{margin-bottom:32px}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;border:1px solid transparent;
  padding:15px 30px;font-size:15px;font-weight:650;line-height:1;
  cursor:pointer;white-space:nowrap;
  transition:background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.btn--primary{background:var(--brand);color:var(--ink-900)}
.btn--primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 10px 24px rgba(174,214,31,.32)}
.btn--ghost{background:transparent;border-color:var(--ink-900);color:var(--ink-900)}
.btn--ghost:hover{background:var(--ink-900);color:var(--paper)}
.btn--light{background:transparent;border-color:rgba(246,245,241,.42);color:var(--paper)}
.btn--light:hover{background:var(--paper);color:var(--ink-900);border-color:var(--paper)}
.btn--sm{padding:11px 20px;font-size:14px}
.btn--xs{padding:8px 16px;font-size:13px}
.btn:active{transform:translateY(0) scale(.985)}
.btn:disabled{opacity:.4;pointer-events:none}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--ink-900);
  transition:color .24s var(--ease);
}
.link-arrow::after{content:"→";display:inline-block;transition:transform .24s var(--ease)}
.link-arrow:hover{color:var(--brand-deep)}
.link-arrow:hover::after{transform:translateX(4px)}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-block;border-radius:6px;
  padding:4px 10px;font-size:12px;font-weight:600;letter-spacing:.06em;
  background:rgba(23,69,58,.09);color:var(--brand-deep);
}
.badge--ink{background:var(--ink-900);color:var(--paper)}
.tag-no{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:26px;height:22px;padding:0 6px;border-radius:6px;
  background:var(--brand);color:var(--ink-900);
  font-size:12px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:.02em;
}

/* ============ 倒计时条 ============ */
.countdown-bar{
  background:var(--ink-900);color:var(--brand);
  height:44px;display:flex;align-items:center;
  font-variant-numeric:tabular-nums;
}
.countdown-inner{display:flex;align-items:center;gap:18px;width:100%;overflow-x:auto;scrollbar-width:none}
.countdown-inner::-webkit-scrollbar{display:none}
.cd-label{font-size:13px;letter-spacing:.04em;color:rgba(246,245,241,.72);white-space:nowrap}
.cd-clock{display:flex;align-items:center;gap:6px}
.cd-unit{display:inline-flex;align-items:baseline;gap:3px}
.cd-unit b{
  font-size:15px;font-weight:700;letter-spacing:.02em;
  background:rgba(200,241,53,.12);border-radius:6px;padding:2px 7px;color:var(--brand);
}
.cd-unit i{font-style:normal;font-size:11px;color:rgba(246,245,241,.5)}
.countdown-inner .btn{margin-left:auto}
@media (max-width:767px){
  .countdown-inner{gap:12px}
  .countdown-inner .btn{margin-left:8px}
}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,245,241,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:28px;height:var(--nav-h)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:.005em;flex-shrink:0}
.brand-mark{width:12px;height:12px;background:var(--brand);border:1px solid var(--ink-900);display:block;flex-shrink:0}
.brand-text{white-space:nowrap}
@media (max-width:1023px){.brand{font-size:16px}}

.main-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{position:relative}
.nav-item>a,.nav-mega-trigger{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:10px 13px;font-size:14.5px;font-weight:550;color:var(--ink-700);
  cursor:pointer;border-radius:8px;
  transition:color .24s var(--ease);
}
.nav-item>a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-item>a:hover::after,.nav-item.is-active>a::after{transform:scaleX(1)}
.nav-item>a:hover,.nav-mega-trigger:hover{color:var(--ink-900)}
.nav-item.is-active>a{color:var(--ink-900);font-weight:700}
.caret{
  width:6px;height:6px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-2px);transition:transform .24s var(--ease);
}
.nav-item--mega:hover .caret{transform:rotate(-135deg) translateY(-2px)}

.mega-panel{
  position:absolute;top:calc(100% + 16px);right:0;
  width:780px;padding:28px;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:0 26px 64px rgba(11,13,14,.16);
  display:grid;grid-template-columns:1.05fr 1.15fr 1fr;gap:26px;
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.nav-item--mega:hover .mega-panel,
.nav-item--mega.is-open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col h4{
  font-size:12px;letter-spacing:.14em;color:var(--ink-300);font-weight:700;
  margin-bottom:14px;text-transform:uppercase;
}
.mega-links li+li{margin-top:2px}
.mega-links a{
  display:block;padding:7px 10px;border-radius:8px;font-size:14.5px;color:var(--ink-700);
  transition:background-color .24s var(--ease),color .24s var(--ease);
}
.mega-links a:hover{background:var(--paper-2);color:var(--ink-900)}
.mega-note{font-size:13.5px;line-height:1.7;color:var(--ink-500);margin-bottom:14px}
.mega-card{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--paper);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.mega-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.mega-card img{aspect-ratio:16/10;width:100%;object-fit:cover}
.mega-card-body{padding:14px 16px 16px}
.mega-card-body p{font-size:13.5px;color:var(--ink-500);line-height:1.6;margin-bottom:12px}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-strong);border-radius:10px;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
  transition:border-color .24s var(--ease);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle:hover{border-color:var(--ink-900)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media (max-width:1199px){
  .nav-item>a,.nav-mega-trigger{padding:10px 10px;font-size:14px}
}
@media (max-width:1023px){
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .header-actions .btn{display:none}
}

.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,380px);
  background:var(--ink-900);color:var(--paper);z-index:90;
  padding:28px 24px 40px;overflow-y:auto;
  transform:translateX(102%);
  transition:transform .3s var(--ease);
}
.mobile-drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.drawer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px}
.drawer-close{width:38px;height:38px;border:1px solid rgba(246,245,241,.24);border-radius:10px;color:var(--paper);font-size:18px;line-height:1;cursor:pointer}
.drawer-group-title{font-size:12px;letter-spacing:.14em;color:rgba(246,245,241,.45);font-weight:700;margin:22px 0 10px}
.drawer-links a{display:block;padding:12px 0;font-size:15.5px;border-bottom:1px solid rgba(246,245,241,.10);color:rgba(246,245,241,.86);transition:color .24s var(--ease)}
.drawer-links a:hover{color:var(--brand)}
.drawer-links a.is-active{color:var(--brand);font-weight:700}
.drawer-cta{margin-top:28px;width:100%}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,13,14,.5);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ============ Hero ============ */
.hero{padding:76px 0 0;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero-copy .eyebrow{margin-bottom:20px}
.hero-copy h1{margin-bottom:22px}
.hero-sub{font-size:clamp(16px,1.35vw,19px);line-height:1.75;color:var(--ink-500);max-width:34em;margin-bottom:32px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:48px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}
.hero-stats li{padding:20px 22px 4px 0;border-right:1px solid var(--line)}
.hero-stats li:last-child{border-right:0}
.stat-num{display:block;font-size:clamp(24px,2.4vw,30px);font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.stat-label{display:block;font-size:13px;color:var(--ink-500);margin-top:6px;letter-spacing:.02em}

.hero-visual{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line)}
.hero-visual img{width:100%;aspect-ratio:4/5;object-fit:cover;transition:transform .6s var(--ease)}
.hero-visual:hover img{transform:scale(1.04)}
.hero-visual::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(246,245,241,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(246,245,241,.16) 1px,transparent 1px);
  background-size:44px 44px;
  mix-blend-mode:overlay;
}
.corner-tag{
  position:absolute;top:16px;left:16px;z-index:2;
  background:var(--brand);color:var(--ink-900);
  font-size:12px;font-weight:700;letter-spacing:.06em;
  padding:5px 10px;border-radius:6px;font-variant-numeric:tabular-nums;
}
.hero-rule{
  margin-top:64px;height:22px;
  border-top:1px solid var(--line-strong);
  background-image:repeating-linear-gradient(90deg,var(--line-strong) 0 1px,transparent 1px 40px);
  background-size:auto 12px;background-repeat:repeat-x;background-position:top left;
}
@media (max-width:1023px){
  .hero{padding:52px 0 0}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual img{aspect-ratio:16/10}
  .hero-rule{margin-top:44px}
}
@media (max-width:767px){
  .hero-cta{margin-bottom:32px}
  .hero-stats{grid-template-columns:1fr}
  .hero-stats li{border-right:0;border-bottom:1px solid var(--line);padding:16px 0}
  .hero-stats li:last-child{border-bottom:0}
}

/* ============ 编号卖点横排 ============ */
.point-row{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border-top:1px solid var(--line-strong);
}
.point{
  padding:34px 32px 8px 0;
  border-right:1px solid var(--line);
}
.point:last-child{border-right:0;padding-right:0}
.point:not(:first-child){padding-left:32px}
.point-no{
  display:block;font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--brand-deep);margin-bottom:16px;font-variant-numeric:tabular-nums;
}
.point h3{margin-bottom:12px}
.point p{color:var(--ink-500);font-size:15.5px;line-height:1.8;max-width:32em}
@media (max-width:1023px){
  .point-row{grid-template-columns:1fr}
  .point{border-right:0;border-bottom:1px solid var(--line);padding:28px 0}
  .point:not(:first-child){padding-left:0}
  .point:last-child{border-bottom:0;padding-bottom:0}
}

/* ============ 亮点图墙 ============ */
.wall{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:198px;gap:24px}
.wall-item{
  position:relative;overflow:hidden;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--paper);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.wall-item:hover{border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.wall-item img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.wall-item:hover img{transform:scale(1.04)}
.wall-item::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,13,14,0) 40%,rgba(11,13,14,.66) 100%);
  transition:opacity .24s var(--ease);
}
.wall-item:hover::after{opacity:.86}
.wall-item figcaption{
  position:absolute;left:18px;right:18px;bottom:16px;z-index:2;
  display:flex;align-items:center;gap:10px;
  color:#F6F5F1;font-size:14.5px;font-weight:600;line-height:1.5;
}
.wall-item--big{grid-column:span 2;grid-row:span 2}
.wall-item--wide{grid-column:span 4}
.wall-item--wide img{object-position:center 38%}
@media (max-width:1023px){
  .wall{grid-template-columns:repeat(2,1fr);grid-auto-rows:190px;gap:18px}
  .wall-item--big{grid-column:span 2;grid-row:span 1}
  .wall-item--wide{grid-column:span 2}
}
@media (max-width:520px){
  .wall{grid-auto-rows:170px;gap:14px}
  .wall-item figcaption{font-size:13px;left:14px;right:14px;bottom:12px}
}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),transform .24s var(--ease);
}
.news-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.news-card__media{display:block;overflow:hidden;aspect-ratio:16/10;background:var(--paper-2)}
.news-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.news-card:hover .news-card__media img{transform:scale(1.04)}
.news-card__body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-card__title{font-size:17.5px;line-height:1.5;font-weight:650}
.news-card__title a:hover{text-decoration:underline;text-underline-offset:4px}
.news-card__desc{
  color:var(--ink-500);font-size:14.5px;line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-300);font-variant-numeric:tabular-nums;
}
.empty-state{
  grid-column:1/-1;
  border:1px dashed var(--line-strong);border-radius:var(--radius);
  padding:56px 28px;text-align:center;color:var(--ink-500);
  display:flex;flex-direction:column;align-items:center;gap:18px;
}
@media (max-width:1023px){.news-grid{grid-template-columns:repeat(2,1fr);gap:18px}}
@media (max-width:640px){.news-grid{grid-template-columns:1fr}}

/* ============ CTA 申领区 ============ */
.cta-band{
  background:linear-gradient(135deg,#17453A 0%,#0F332B 100%);
  color:var(--paper);padding:100px 0;
}
.cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.cta-band .eyebrow{color:var(--brand)}
.cta-band .eyebrow::before{background:var(--brand)}
.cta-copy h2{color:var(--paper);margin-bottom:16px}
.cta-copy p{color:rgba(246,245,241,.72);font-size:16px;max-width:34em;margin-bottom:26px}
.cta-list li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:15px;color:rgba(246,245,241,.8);padding:9px 0;
  border-top:1px solid rgba(246,245,241,.12);
}
.cta-list li:first-child{border-top:0}
.cta-list li::before{
  content:"";flex:0 0 8px;height:8px;margin-top:9px;background:var(--brand);border-radius:2px;
}
.cta-form{display:flex;flex-direction:column;gap:22px}
.cta-form .field{position:relative;padding-top:22px}
.cta-form .field input{
  width:100%;padding:8px 0 10px;border:0;border-bottom:1px solid rgba(246,245,241,.28);
  background:transparent;color:var(--paper);font-size:16px;
  transition:border-color .24s var(--ease);
}
.cta-form .field input:focus{outline:none;border-bottom-color:var(--brand)}
.cta-form .field label{
  position:absolute;left:0;top:24px;font-size:15px;color:rgba(246,245,241,.55);
  transform-origin:left top;pointer-events:none;
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.cta-form .field input:focus + label,
.cta-form .field input:not(:placeholder-shown) + label{
  transform:translateY(-26px) scale(.78);color:var(--brand);
}
.form-note{font-size:12.5px;color:rgba(246,245,241,.5);line-height:1.7}
.cta-form .btn{width:100%}
@media (max-width:1023px){
  .cta-band{padding:72px 0}
  .cta-inner{grid-template-columns:1fr;gap:40px}
}
@media (max-width:767px){.cta-band{padding:56px 0}}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:56px;align-items:start}
.faq-side h2{margin-bottom:14px}
.faq-side p{color:var(--ink-500);font-size:15.5px;margin-bottom:24px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;min-height:64px;padding:18px 0;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  text-align:left;font-size:16.5px;font-weight:600;color:var(--ink-900);cursor:pointer;
  transition:color .24s var(--ease);
}
.faq-q:hover{color:var(--brand-deep)}
.faq-icon{position:relative;flex:0 0 18px;height:18px;transition:transform .28s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink-900);border-radius:2px}
.faq-icon::before{left:0;right:0;top:8px;height:2px}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.faq-item.is-open .faq-a{max-height:460px}
.faq-a-inner{padding:0 48px 24px 0;color:var(--ink-500);font-size:15.5px;line-height:1.88}
@media (max-width:1023px){
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .faq-a-inner{padding-right:24px}
}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:rgba(246,245,241,.8);padding:80px 0 0}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:56px;
}
.footer-brand .brand{color:var(--paper);margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(246,245,241,.6);max-width:26em}
.footer-col h4{
  font-size:12px;letter-spacing:.14em;color:rgba(246,245,241,.45);
  font-weight:700;margin-bottom:16px;text-transform:uppercase;
}
.footer-col li+li{margin-top:2px}
.footer-col a,.footer-col span{
  display:block;padding:6px 0;font-size:14.5px;color:rgba(246,245,241,.78);
  transition:color .24s var(--ease);
}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;border-top:1px solid rgba(246,245,241,.12);
  font-size:13px;color:rgba(246,245,241,.5);flex-wrap:wrap;
}
.to-top{color:rgba(246,245,241,.7);transition:color .24s var(--ease)}
.to-top:hover{color:var(--brand)}
@media (max-width:1023px){
  .site-footer{padding:60px 0 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding-bottom:40px}
}
@media (max-width:600px){
  .footer-grid{grid-template-columns:1fr}
}

/* ============ 入场动效 ============ */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js .reveal.is-visible{opacity:1;transform:none}
.js .news-grid .reveal:nth-child(2){transition-delay:.06s}
.js .news-grid .reveal:nth-child(3){transition-delay:.12s}
.js .news-grid .reveal:nth-child(4){transition-delay:.06s}
.js .news-grid .reveal:nth-child(5){transition-delay:.12s}
.js .news-grid .reveal:nth-child(6){transition-delay:.18s}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
}

/* roulang page: category1 */
:root{
  --ink-900:#0B0D0E;
  --ink-800:#14181A;
  --ink-700:#1F2528;
  --ink-500:#5A6469;
  --ink-300:#9AA4A8;
  --line:rgba(11,13,14,.10);
  --paper:#F6F5F1;
  --paper-2:#ECEAE4;
  --brand:#C8F135;
  --brand-deep:#17453A;
  --accent:#FF6A2B;
  --radius-card:14px;
  --radius-pill:999px;
  --radius-badge:6px;
  --shadow-hover:0 12px 32px rgba(11,13,14,.10);
  --ease:cubic-bezier(.2,.8,.2,1);
  --sp-8:8px;--sp-12:12px;--sp-16:16px;--sp-24:24px;--sp-32:32px;--sp-48:48px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  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:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:750;}
p{margin:0;}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
::selection{background:var(--brand);color:var(--ink-900);}

.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 32px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(246,245,241,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:var(--sp-32);
  min-height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  width:12px;height:12px;
  background:var(--brand);
  display:inline-block;
}
.brand-text{
  font-weight:800;
  font-size:19px;
  letter-spacing:.01em;
  white-space:nowrap;
}
.main-nav{flex:1 1 auto;}
.nav-list{
  display:flex;
  align-items:center;
  gap:4px;
}
.nav-item{position:relative;}
.nav-item > a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:10px 12px;
  font-size:15px;
  font-weight:600;
  color:var(--ink-700);
  position:relative;
  transition:color 240ms var(--ease);
  white-space:nowrap;
}
.nav-item > a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform 240ms var(--ease);
}
.nav-item > a:hover{color:var(--ink-900);}
.nav-item > a:hover::after{transform:scaleX(1);}
.nav-item.is-active > a{color:var(--ink-900);}
.nav-item.is-active > a::after{transform:scaleX(1);}
.caret{
  width:7px;height:7px;
  border-right:1.6px solid currentColor;
  border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translate(-1px,-1px);
  transition:transform 240ms var(--ease);
}
.nav-item--mega:hover .caret,
.nav-item--mega:focus-within .caret{transform:rotate(225deg) translate(-2px,-2px);}

.mega-panel{
  position:absolute;
  right:0;
  top:calc(100% + 10px);
  width:820px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-hover);
  padding:var(--sp-24);
  display:grid;
  grid-template-columns:1fr 1fr 1.1fr;
  gap:var(--sp-32);
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity 240ms var(--ease),transform 240ms var(--ease),visibility 240ms;
}
.nav-item--mega:hover .mega-panel,
.nav-item--mega:focus-within .mega-panel,
.nav-item--mega.is-open .mega-panel{
  opacity:1;visibility:visible;transform:translateY(0);
}
.mega-col h4{
  font-size:13px;
  letter-spacing:.06em;
  color:var(--ink-300);
  font-weight:650;
  margin-bottom:var(--sp-12);
}
.mega-links li + li{margin-top:10px;}
.mega-links a{
  font-size:14.5px;
  font-weight:600;
  color:var(--ink-700);
  transition:color 200ms var(--ease);
}
.mega-links a:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px;}
.mega-note{font-size:13.5px;color:var(--ink-500);line-height:1.7;margin-bottom:var(--sp-12);}
.mega-card{
  display:block;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:box-shadow 240ms var(--ease),border-color 240ms var(--ease),transform 240ms var(--ease);
}
.mega-card:hover{box-shadow:var(--shadow-hover);border-color:var(--ink-300);transform:translateY(-2px);}
.mega-card img{width:100%;height:118px;object-fit:cover;}
.mega-card-body{padding:var(--sp-16);}
.mega-card-body p{font-size:13.5px;color:var(--ink-500);line-height:1.7;margin-bottom:var(--sp-12);}

.header-actions{
  display:flex;
  align-items:center;
  gap:var(--sp-12);
  flex:0 0 auto;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--radius-pill);
  font-weight:650;
  text-align:center;
  border:1px solid transparent;
  transition:background 240ms var(--ease),color 240ms var(--ease),border-color 240ms var(--ease),transform 240ms var(--ease),box-shadow 240ms var(--ease);
}
.btn--primary{
  background:var(--brand);
  color:var(--ink-900);
  padding:13px 26px;
  font-size:15px;
}
.btn--primary:hover{background:#B8E028;transform:translateY(-1px);box-shadow:0 10px 24px rgba(11,13,14,.14);}
.btn--ghost{
  background:transparent;
  color:var(--ink-900);
  border-color:var(--ink-900);
  padding:12px 24px;
  font-size:15px;
}
.btn--ghost:hover{background:var(--ink-900);color:var(--paper);}
.btn--sm{padding:9px 18px;font-size:14px;}
.btn--xs{padding:7px 14px;font-size:13px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}
.btn--text{
  padding:0;
  background:none;
  color:var(--ink-900);
  font-weight:650;
  font-size:14.5px;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.btn--text .arrow{transition:transform 240ms var(--ease);}
.btn--text:hover .arrow{transform:translateX(4px);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:10px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.nav-toggle span{display:block;width:18px;height:1.8px;background:var(--ink-900);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  padding:64px 0 56px;
  min-height:280px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
  opacity:.16;
  filter:grayscale(.3);
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.7;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb{
  font-size:13px;
  color:var(--ink-500);
  margin-bottom:var(--sp-24);
}
.breadcrumb a{transition:color 200ms var(--ease);}
.breadcrumb a:hover{color:var(--ink-900);text-decoration:underline;text-underline-offset:4px;}
.breadcrumb span.sep{margin:0 8px;color:var(--ink-300);}
.breadcrumb .current{color:var(--ink-700);}
.page-hero h1{
  font-size:clamp(30px,3.6vw,50px);
  line-height:1.1;
  font-weight:800;
  max-width:16em;
}
.page-hero .lead{
  margin-top:var(--sp-16);
  font-size:17px;
  color:var(--ink-700);
  max-width:44em;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:var(--sp-24);}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  border-radius:var(--radius-badge);
  padding:5px 11px;
  font-size:12.5px;
  letter-spacing:.06em;
  background:var(--paper-2);
  color:var(--ink-700);
  font-weight:600;
}
.badge--dark{background:var(--ink-900);color:var(--paper);}
.badge--brand{background:var(--brand);color:var(--ink-900);}

/* ---------- sections ---------- */
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--alt{background:var(--paper-2);}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:var(--sp-24);
  margin-bottom:var(--sp-48);
}
.section-head h2{
  font-size:clamp(24px,2.6vw,36px);
  line-height:1.18;
}
.section-head .sub{
  font-size:15px;
  color:var(--ink-500);
  margin-top:10px;
  max-width:46em;
}
.eyebrow{
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--ink-300);
  font-weight:650;
  display:block;
  margin-bottom:10px;
}

/* ---------- scale strip ---------- */
.scale-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.scale-item{
  padding:var(--sp-24) var(--sp-24) var(--sp-24) 0;
  border-right:1px solid var(--line);
}
.scale-item:last-child{border-right:0;}
.scale-item .idx{
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--brand-deep);
  display:block;
  margin-bottom:10px;
}
.scale-item h3{font-size:18px;font-weight:650;margin-bottom:8px;}
.scale-item p{font-size:14.5px;color:var(--ink-500);line-height:1.75;}

/* ---------- zigzag ---------- */
.zigzag{display:flex;flex-direction:column;gap:80px;}
.zigzag-item{
  display:grid;
  grid-template-columns:5fr 6fr;
  gap:56px;
  align-items:center;
}
.zigzag-item:nth-child(even) .zigzag-media{order:2;}
.zigzag-item:nth-child(even) .zigzag-body{order:1;}
.zigzag-media{
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  position:relative;
  transition:box-shadow 240ms var(--ease),border-color 240ms var(--ease);
}
.zigzag-media img{
  width:100%;
  height:340px;
  object-fit:cover;
  transition:transform 400ms var(--ease);
}
.zigzag-media:hover{box-shadow:var(--shadow-hover);border-color:var(--ink-300);}
.zigzag-media:hover img{transform:scale(1.04);}
.zigzag-media .corner{
  position:absolute;
  left:16px;top:16px;
  background:var(--ink-900);
  color:var(--paper);
  font-size:12.5px;
  letter-spacing:.08em;
  padding:5px 10px;
  border-radius:var(--radius-badge);
}
.zigzag-body .step-no{
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--ink-300);
  display:block;
  margin-bottom:12px;
}
.zigzag-body h2{
  font-size:clamp(22px,2.3vw,30px);
  line-height:1.25;
  margin-bottom:var(--sp-16);
}
.zigzag-body p{font-size:16.5px;color:var(--ink-700);margin-bottom:var(--sp-24);}
.point-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--ink-700);
  line-height:1.8;
  margin-bottom:12px;
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:8px;height:8px;
  background:var(--brand);
  border-radius:2px;
}
.point-list li strong{font-weight:650;color:var(--ink-900);}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-deep);
  color:#F6F5F1;
  padding:80px 0;
}
.cta-inner{
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:56px;
  align-items:center;
}
.cta-band h2{
  font-size:clamp(26px,3vw,38px);
  line-height:1.2;
  margin-bottom:var(--sp-16);
}
.cta-band p{font-size:16px;color:rgba(246,245,241,.76);max-width:38em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:var(--sp-16);}
.cta-band .btn--ghost{border-color:rgba(246,245,241,.6);color:#F6F5F1;}
.cta-band .btn--ghost:hover{background:#F6F5F1;color:var(--brand-deep);border-color:#F6F5F1;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-900);
  color:rgba(246,245,241,.78);
  padding:72px 0 0;
  font-size:14.5px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:var(--sp-48);
  padding-bottom:var(--sp-48);
}
.footer-brand .brand-text{color:#F6F5F1;}
.footer-brand p{
  margin-top:var(--sp-16);
  color:rgba(246,245,241,.62);
  line-height:1.8;
  max-width:32em;
}
.footer-col h4{
  font-size:13px;
  letter-spacing:.1em;
  color:rgba(246,245,241,.5);
  font-weight:650;
  margin-bottom:var(--sp-16);
}
.footer-col li + li{margin-top:10px;}
.footer-col a{transition:color 200ms var(--ease);}
.footer-col a:hover{color:var(--brand);}
.footer-col span{color:rgba(246,245,241,.62);}
.footer-bottom{
  border-top:1px solid rgba(246,245,241,.14);
  padding-top:var(--sp-24);
  padding-bottom:var(--sp-24);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-16);
  font-size:13.5px;
  color:rgba(246,245,241,.55);
}
.to-top{color:rgba(246,245,241,.8);transition:color 200ms var(--ease);}
.to-top:hover{color:var(--brand);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 600ms var(--ease),transform 600ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* ---------- responsive ---------- */
@media (max-width:1439px){
  .container{max-width:1140px;}
}
@media (max-width:1199px){
  .container{max-width:960px;padding:0 24px;}
  .header-inner{gap:var(--sp-16);}
  .nav-item > a{padding:10px 9px;font-size:14.5px;}
  .mega-panel{width:720px;}
}
@media (max-width:1023px){
  .container{max-width:100%;padding:0 24px;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;
    top:72px;right:0;bottom:0;
    width:min(360px,86vw);
    background:var(--ink-900);
    padding:var(--sp-24);
    overflow-y:auto;
    transform:translateX(100%);
    transition:transform 280ms var(--ease);
    border-left:1px solid rgba(246,245,241,.1);
  }
  body.nav-open .main-nav{transform:translateX(0);}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px;}
  .nav-item > a{
    color:rgba(246,245,241,.86);
    font-size:16px;
    padding:14px 4px;
    justify-content:space-between;
    width:100%;
    border-bottom:1px solid rgba(246,245,241,.1);
  }
  .nav-item > a::after{display:none;}
  .nav-item.is-active > a{color:var(--brand);}
  .mega-panel{
    position:static;
    width:auto;
    opacity:1;
    visibility:visible;
    transform:none;
    box-shadow:none;
    background:transparent;
    border:0;
    border-radius:0;
    padding:var(--sp-16) 4px var(--sp-8);
    grid-template-columns:1fr;
    gap:var(--sp-24);
    display:none;
  }
  .nav-item--mega:hover .mega-panel,
  .nav-item--mega:focus-within .mega-panel,
  .nav-item--mega.is-open .mega-panel{display:grid;}
  .mega-col h4{color:rgba(246,245,241,.45);}
  .mega-links a{color:rgba(246,245,241,.8);}
  .mega-note{color:rgba(246,245,241,.6);}
  .mega-card{border-color:rgba(246,245,241,.16);}
  .mega-card-body p{color:rgba(246,245,241,.6);}
  .section{padding:72px 0;}
  .scale-strip{grid-template-columns:repeat(2,1fr);}
  .scale-item{border-right:0;border-bottom:1px solid var(--line);padding-right:var(--sp-16);}
  .scale-item:nth-child(odd){border-right:1px solid var(--line);}
  .scale-item:last-child,.scale-item:nth-last-child(2){border-bottom:0;}
  .zigzag{gap:56px;}
  .zigzag-item{grid-template-columns:1fr;gap:var(--sp-24);}
  .zigzag-item:nth-child(even) .zigzag-media,
  .zigzag-item:nth-child(even) .zigzag-body{order:0;}
  .zigzag-media img{height:280px;}
  .cta-inner{grid-template-columns:1fr;gap:var(--sp-32);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-32);}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .brand-text{font-size:17px;}
  .header-inner{min-height:64px;}
  .main-nav{top:64px;}
  .page-hero{padding:40px 0 40px;min-height:0;}
  .page-hero h1{font-size:clamp(26px,7vw,34px);}
  .page-hero .lead{font-size:15.5px;}
  .section{padding:56px 0;}
  .section-head{flex-direction:column;align-items:flex-start;margin-bottom:var(--sp-32);}
  .scale-strip{grid-template-columns:1fr;}
  .scale-item{border-right:0 !important;border-bottom:1px solid var(--line);}
  .scale-item:last-child{border-bottom:0;}
  .zigzag-media img{height:220px;}
  .zigzag-body p{font-size:15.5px;}
  .cta-band{padding:56px 0;}
  .footer-grid{grid-template-columns:1fr;padding-bottom:var(--sp-32);}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: article */
:root{
  --ink-900:#0B0D0E;
  --ink-800:#14181A;
  --ink-700:#1F2528;
  --ink-500:#5A6469;
  --ink-300:#9AA4A8;
  --line:rgba(11,13,14,.10);
  --line-strong:rgba(11,13,14,.24);
  --paper:#F6F5F1;
  --paper-2:#ECEAE4;
  --brand:#C8F135;
  --brand-deep:#17453A;
  --accent:#FF6A2B;
  --radius:14px;
  --radius-sm:6px;
  --shadow-hover:0 12px 32px rgba(11,13,14,.10);
  --ease:cubic-bezier(.2,.8,.2,1);
  --container:1280px;
  --dur:240ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
input,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,245,241,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;gap:32px;
  min-height:74px;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em}
.brand-mark{width:12px;height:12px;background:var(--brand);border-radius:3px;flex:0 0 auto}
.brand-text{font-size:19px;font-weight:800;white-space:nowrap}
.main-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:6px}
.nav-item{position:relative}
.nav-item > a{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 14px;font-size:15px;color:var(--ink-700);
  border-radius:999px;position:relative;transition:color var(--dur) var(--ease);
}
.nav-item > a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.nav-item > a:hover{color:var(--ink-900)}
.nav-item > a:hover::after,.nav-item.is-active > a::after{transform:scaleX(1)}
.nav-item.is-active > a{color:var(--ink-900);font-weight:700}
.caret{
  width:7px;height:7px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-2px);display:inline-block;
}
.mega-panel{
  position:absolute;top:calc(100% + 12px);right:0;width:820px;
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:26px;display:grid;grid-template-columns:1fr 1fr 1.1fr;gap:24px;
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur);
  box-shadow:0 24px 60px rgba(11,13,14,.12);
}
.nav-item--mega:hover .mega-panel,.nav-item--mega:focus-within .mega-panel,.mega-panel.is-open{
  opacity:1;visibility:visible;transform:translateY(0);
}
.mega-col h4{font-size:13px;letter-spacing:.06em;color:var(--ink-500);font-weight:700;margin-bottom:12px}
.mega-links li + li{margin-top:8px}
.mega-links a{font-size:14px;color:var(--ink-700);transition:color var(--dur) var(--ease)}
.mega-links a:hover{color:var(--brand-deep);text-decoration:underline}
.mega-note{font-size:13px;color:var(--ink-500);line-height:1.7;margin-bottom:12px}
.mega-card{
  display:block;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;background:var(--paper);
  transition:box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.mega-card:hover{box-shadow:var(--shadow-hover);border-color:var(--line-strong);transform:translateY(-2px)}
.mega-card img{width:100%;height:112px;object-fit:cover;border-radius:0}
.mega-card-body{padding:14px}
.mega-card-body p{font-size:13px;color:var(--ink-500);line-height:1.7;margin-bottom:12px}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:1.6px;background:var(--ink-800);transition:transform var(--dur) var(--ease),opacity var(--dur)}
.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)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:13px 26px;font-size:15px;font-weight:650;line-height:1;
  border:1px solid transparent;transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
  cursor:pointer;white-space:nowrap;
}
.btn--primary{background:var(--brand);color:var(--ink-900)}
.btn--primary:hover{background:#B9E424;transform:translateY(-1px);box-shadow:0 10px 24px rgba(11,13,14,.12)}
.btn--ghost{background:transparent;color:var(--ink-900);border-color:var(--ink-900)}
.btn--ghost:hover{background:var(--ink-900);color:var(--paper)}
.btn--light{background:var(--paper);color:var(--ink-900)}
.btn--light:hover{background:var(--brand);transform:translateY(-1px)}
.btn--outline-light{background:transparent;color:var(--paper);border-color:rgba(246,245,241,.45)}
.btn--outline-light:hover{background:rgba(246,245,241,.12);border-color:var(--paper)}
.btn--xs{padding:9px 16px;font-size:13px}
.btn--sm{padding:11px 20px;font-size:14px}
.btn--text{padding:0;border:0;font-weight:650;color:var(--brand-deep);gap:6px}
.btn--text .arrow{transition:transform var(--dur) var(--ease);display:inline-block}
.btn--text:hover .arrow{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

/* ---------- badges ---------- */
.badge-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:var(--radius-sm);
  font-size:12px;letter-spacing:.06em;font-weight:650;
  background:var(--paper-2);color:var(--ink-700);border:1px solid var(--line);
}
.badge--brand{background:var(--brand);color:var(--ink-900);border-color:transparent}
.badge--ink{background:var(--ink-900);color:var(--paper);border-color:transparent}
.badge--ghost{background:transparent;color:var(--ink-500)}

/* ---------- breadcrumb ---------- */
.crumb-bar{border-bottom:1px solid var(--line);background:var(--paper)}
.crumb{
  display:flex;align-items:center;gap:8px;
  min-height:52px;font-size:13px;color:var(--ink-500);
  white-space:nowrap;overflow:hidden;
}
.crumb a{color:var(--ink-500);transition:color var(--dur) var(--ease)}
.crumb a:hover{color:var(--brand-deep)}
.crumb span{color:var(--ink-300)}
.crumb-current{color:var(--ink-900);font-weight:650;overflow:hidden;text-overflow:ellipsis;max-width:52ch}

/* ---------- article layout ---------- */
.article-shell{padding:56px 0 96px}
.article-wrap{
  display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);
  gap:48px;align-items:start;
}
.article-main{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:44px 46px;
}
.article-head{border-bottom:1px solid var(--line);padding-bottom:28px;margin-bottom:32px}
.article-title{
  font-size:clamp(30px,3.6vw,46px);
  line-height:1.16;font-weight:800;letter-spacing:-.015em;
  margin:16px 0 20px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  font-size:13px;color:var(--ink-500);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-300)}
.article-lead{
  font-size:17px;line-height:1.85;color:var(--ink-500);
  margin-top:20px;padding-left:16px;border-left:3px solid var(--brand);
}

/* ---------- article body typography ---------- */
.article-body{font-size:17px;line-height:1.9;color:var(--ink-800);overflow-wrap:break-word}
.article-body > * + *{margin-top:22px}
.article-body h2{
  font-size:clamp(22px,2.2vw,28px);line-height:1.35;font-weight:750;
  margin-top:48px;padding-left:16px;border-left:4px solid var(--brand);
}
.article-body h3{font-size:20px;line-height:1.4;font-weight:650;margin-top:34px;color:var(--ink-900)}
.article-body h4{font-size:17px;line-height:1.5;font-weight:650;margin-top:26px}
.article-body p{color:var(--ink-700)}
.article-body a{color:var(--brand-deep);font-weight:650;border-bottom:1px solid rgba(23,69,58,.3);transition:border-color var(--dur) var(--ease)}
.article-body a:hover{border-color:var(--brand-deep)}
.article-body ul,.article-body ol{padding-left:0}
.article-body ul li{position:relative;padding-left:22px;margin-top:10px;color:var(--ink-700)}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.75em;width:7px;height:7px;background:var(--brand);border-radius:2px}
.article-body ol{counter-reset:ol}
.article-body ol li{position:relative;padding-left:34px;margin-top:10px;counter-increment:ol;color:var(--ink-700)}
.article-body ol li::before{
  content:counter(ol,decimal-leading-zero);
  position:absolute;left:0;top:0;font-size:13px;font-weight:700;
  color:var(--ink-900);background:var(--brand);
  border-radius:var(--radius-sm);padding:1px 6px;line-height:1.6;font-variant-numeric:tabular-nums;
}
.article-body blockquote{
  margin:28px 0;padding:18px 22px;background:var(--paper-2);
  border-left:3px solid var(--brand-deep);border-radius:0 var(--radius) var(--radius) 0;
  color:var(--ink-700);font-size:16px;
}
.article-body img{margin:26px 0;width:100%;height:auto;border:1px solid var(--line)}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:12px;text-align:center;color:var(--ink-300);margin-top:10px}
.article-body table{
  width:100%;border-collapse:collapse;margin:28px 0;font-size:14.5px;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
}
.article-body thead{background:var(--ink-900);color:var(--paper)}
.article-body th,.article-body td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even){background:rgba(236,234,228,.5)}
.article-body tbody tr:last-child td{border-bottom:0}
.article-body pre{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;overflow-x:auto;font-size:14px;line-height:1.7;
  font-variant-numeric:tabular-nums;
}
.article-body code{background:var(--paper-2);border-radius:4px;padding:1px 6px;font-size:.92em}
.article-body pre code{background:none;padding:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

/* ---------- empty state ---------- */
.empty-state{
  border:1px dashed var(--line-strong);border-radius:var(--radius);
  padding:48px 28px;text-align:center;background:var(--paper);
}
.empty-state h2{font-size:22px;font-weight:750;margin-bottom:10px}
.empty-state p{color:var(--ink-500);max-width:46ch;margin:0 auto 22px}

/* ---------- article footer ---------- */
.article-foot{border-top:1px solid var(--line);margin-top:44px;padding-top:26px}
.article-foot h4{font-size:13px;letter-spacing:.06em;color:var(--ink-500);margin-bottom:12px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;padding:6px 12px;border-radius:var(--radius-sm);
  background:var(--paper-2);color:var(--ink-700);font-size:12.5px;
  border:1px solid var(--line);transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.tag:hover{background:var(--ink-900);color:var(--paper)}
.article-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---------- sidebar ---------- */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:98px}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;transition:box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.side-card:hover{box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.side-title{
  font-size:13px;letter-spacing:.06em;color:var(--ink-500);
  font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px;
}
.side-title::before{content:"";width:10px;height:10px;background:var(--brand);border-radius:3px}
.toc li + li{margin-top:4px}
.toc a{
  display:flex;gap:10px;align-items:baseline;
  padding:9px 10px;border-radius:10px;font-size:14px;color:var(--ink-700);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.toc a:hover{background:var(--paper-2);color:var(--ink-900)}
.toc a .idx{font-size:12px;color:var(--ink-300);font-variant-numeric:tabular-nums}
.side-list li + li{margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
.side-list a{display:block;font-size:14.5px;font-weight:650;line-height:1.5;color:var(--ink-800);transition:color var(--dur) var(--ease)}
.side-list a:hover{color:var(--brand-deep)}
.side-list .side-meta{font-size:12px;color:var(--ink-300);margin-top:6px}
.side-card--cta{
  background:var(--brand-deep);color:var(--paper);border-color:transparent;
}
.side-card--cta .side-title{color:rgba(246,245,241,.72)}
.side-card--cta .side-title::before{background:var(--brand)}
.side-card--cta p{font-size:14px;line-height:1.75;color:rgba(246,245,241,.82);margin-bottom:16px}
.side-card--cta .btn{width:100%}

/* ---------- related ---------- */
.section{padding:0 0 96px}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid var(--line);
}
.section-head h2{font-size:clamp(24px,2.4vw,32px);font-weight:750;letter-spacing:-.01em}
.section-head p{font-size:14px;color:var(--ink-500);margin-top:8px;max-width:52ch}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
  transition:box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.post-card:hover{box-shadow:var(--shadow-hover);border-color:var(--line-strong);transform:translateY(-3px)}
.post-thumb{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--paper-2)}
.post-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 420ms var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-thumb .corner{
  position:absolute;top:12px;left:12px;background:var(--ink-900);color:var(--paper);
  font-size:12px;padding:4px 9px;border-radius:var(--radius-sm);font-variant-numeric:tabular-nums;
}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:17px;line-height:1.5;font-weight:650}
.post-card:hover .post-body h3{text-decoration:underline;text-decoration-color:var(--brand);text-decoration-thickness:2px}
.post-body p{font-size:14px;line-height:1.75;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body .post-time{font-size:12px;color:var(--ink-300);margin-top:auto;font-variant-numeric:tabular-nums}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--brand-deep);
  background-image:linear-gradient(120deg,rgba(200,241,53,.10),rgba(23,69,58,0));
  color:var(--paper);border-radius:20px;padding:52px 48px;
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:32px;align-items:center;
}
.cta-band h2{font-size:clamp(24px,2.6vw,36px);font-weight:750;line-height:1.2;letter-spacing:-.01em}
.cta-band p{margin-top:14px;font-size:15px;line-height:1.8;color:rgba(246,245,241,.78);max-width:56ch}
.cta-band .cta-actions{display:flex;flex-direction:column;gap:12px;align-items:stretch}
.cta-band .cta-actions .btn{width:100%}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:48px;align-items:start}
.faq-side h2{font-size:clamp(24px,2.6vw,34px);font-weight:750;line-height:1.2}
.faq-side p{margin-top:14px;font-size:14.5px;color:var(--ink-500);line-height:1.8}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:14px 4px;text-align:left;
  font-size:16px;font-weight:650;color:var(--ink-900);
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--brand-deep)}
.faq-icon{
  position:relative;flex:0 0 auto;width:26px;height:26px;border:1px solid var(--line-strong);border-radius:50%;
  transition:transform 280ms var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink-800);
  transform:translate(-50%,-50%);transition:background var(--dur) var(--ease);
}
.faq-icon::before{width:11px;height:1.6px}
.faq-icon::after{width:1.6px;height:11px}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--brand);border-color:var(--brand)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 280ms var(--ease),opacity 280ms var(--ease);
  opacity:0;
}
.faq-item.is-open .faq-a{opacity:1}
.faq-a-inner{padding:0 4px 22px;font-size:15px;line-height:1.85;color:var(--ink-500);max-width:70ch}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(246,245,241,.78);margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
  padding:72px 32px 48px;
}
.footer-grid > *{border-right:1px solid rgba(246,245,241,.12);padding-right:28px}
.footer-grid > *:last-child{border-right:0;padding-right:0}
.footer-brand .brand{color:var(--paper);margin-bottom:16px}
.footer-brand .brand-text{font-size:18px}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(246,245,241,.6);max-width:34ch}
.footer-col h4{font-size:13px;letter-spacing:.06em;color:rgba(246,245,241,.55);margin-bottom:16px;font-weight:700}
.footer-col li + li{margin-top:10px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(246,245,241,.78);transition:color var(--dur) var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 32px 32px;border-top:1px solid rgba(246,245,241,.12);
  font-size:13px;color:rgba(246,245,241,.5);
}
.to-top{color:var(--brand);font-weight:650;transition:transform var(--dur) var(--ease)}
.to-top:hover{transform:translateY(-3px)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity 600ms var(--ease),transform 600ms var(--ease)}
.reveal.is-in:nth-child(2){transition-delay:60ms}
.reveal.is-in:nth-child(3){transition-delay:120ms}
.reveal.is-in:nth-child(4){transition-delay:180ms}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  :root{--container:1140px}
  .mega-panel{width:720px}
}
@media (max-width:1024px){
  :root{--container:960px}
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;inset:74px 0 0 0;background:var(--ink-900);
    padding:24px 24px 48px;overflow-y:auto;
    transform:translateX(-100%);transition:transform 280ms var(--ease);
    margin-left:0;
  }
  .main-nav.is-open{transform:translateX(0)}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-item > a{color:var(--paper);font-size:16px;padding:14px 8px;border-radius:10px;justify-content:space-between}
  .nav-item > a:hover{color:var(--brand);background:rgba(246,245,241,.06)}
  .nav-item > a::after{display:none}
  .mega-panel{
    position:static;width:auto;opacity:1;visibility:visible;transform:none;
    box-shadow:none;background:rgba(246,245,241,.05);border-color:rgba(246,245,241,.14);
    grid-template-columns:1fr;margin:8px 0 12px;padding:18px;
  }
  .mega-col h4,.mega-col p,.mega-links a{color:rgba(246,245,241,.75)}
  .mega-card{background:rgba(246,245,241,.06);border-color:rgba(246,245,241,.14)}
  .mega-card-body p{color:rgba(246,245,241,.6)}
  .article-wrap{grid-template-columns:minmax(0,1fr);gap:32px}
  .article-side{position:static}
  .article-main{padding:36px 30px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .faq-wrap{grid-template-columns:minmax(0,1fr);gap:28px}
  .cta-band{grid-template-columns:minmax(0,1fr);padding:40px 32px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding:56px 32px 36px}
  .footer-grid > *{border-right:0;padding-right:0}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .header-inner{min-height:66px;gap:12px}
  .brand-text{font-size:16px}
  .article-shell{padding:36px 0 64px}
  .article-main{padding:26px 20px;border-radius:14px}
  .article-title{margin:12px 0 16px}
  .article-body{font-size:16px;line-height:1.88}
  .section{padding-bottom:64px}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{padding:32px 22px;border-radius:14px}
  .footer-grid{grid-template-columns:minmax(0,1fr);padding:48px 20px 28px;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;padding:18px 20px 28px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (max-width:520px){
  .crumb{font-size:12px;gap:6px}
  .article-title{font-size:26px}
  .btn{padding:12px 20px;font-size:14px}
  .cta-band .cta-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink-900:#0B0D0E;
  --ink-800:#14181A;
  --ink-700:#1F2528;
  --ink-500:#5A6469;
  --ink-300:#9AA4A8;
  --line:rgba(11,13,14,.10);
  --paper:#F6F5F1;
  --paper-2:#ECEAE4;
  --brand:#C8F135;
  --brand-deep:#17453A;
  --accent:#FF6A2B;
  --radius-card:14px;
  --radius-badge:6px;
  --shadow-hover:0 12px 32px rgba(11,13,14,.10);
  --ease:cubic-bezier(.2,.8,.2,1);
  --container:1280px;
  --h1:clamp(34px,5.2vw,66px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-radius:var(--radius-card)}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1{font-size:var(--h1);line-height:1.06;font-weight:800;letter-spacing:-.01em}
h2{font-size:clamp(26px,3vw,40px);line-height:1.15;font-weight:750;letter-spacing:-.01em}
h3{font-size:21px;line-height:1.3;font-weight:650}
h4{font-size:17px;line-height:1.4;font-weight:600}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.num,.stat-value,.step-dot,.row-index{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:104px 0}
.section--alt{background:var(--paper-2)}
.section--tight{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:48px}
.section-head--stack{display:block;max-width:720px}
.eyebrow{
  display:inline-block;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--ink-500);
  text-transform:uppercase;
  margin-bottom:16px;
}
.lead{font-size:17px;line-height:1.9;color:var(--ink-500);margin-top:16px;max-width:720px}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(246,245,241,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:28px;min-height:76px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.01em}
.brand-mark{width:12px;height:12px;border-radius:2px;background:var(--brand);display:inline-block;flex:0 0 auto}
.brand-text{white-space:nowrap}
.main-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{position:relative}
.nav-item>a{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:12px 14px;
  font-size:15px;
  font-weight:500;
  border-radius:999px;
  transition:color 240ms var(--ease),background-color 240ms var(--ease);
  white-space:nowrap;
}
.nav-item>a::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:6px;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 240ms var(--ease);
}
.nav-item:hover>a::after,
.nav-item.is-active>a::after{transform:scaleX(1)}
.nav-item.is-active>a{font-weight:700}
.caret{
  width:6px;height:6px;
  border-right:1.6px solid currentColor;
  border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-2px);
  transition:transform 240ms var(--ease);
}
.nav-item--mega:hover .caret{transform:rotate(45deg) translateY(1px)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:999px;
  background:transparent;
  cursor:pointer;
  padding:0;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
  transition:border-color 240ms var(--ease);
}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--ink-900);transition:transform 240ms var(--ease),opacity 240ms var(--ease)}
.nav-toggle:hover{border-color:rgba(11,13,14,.3)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}

/* ---------- Mega 面板 ---------- */
.mega-panel{
  position:absolute;
  top:calc(100% + 12px);
  right:0;
  width:820px;
  display:grid;
  grid-template-columns:1fr 1fr 1.1fr;
  gap:28px;
  padding:28px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:0 16px 44px rgba(11,13,14,.10);
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity 240ms var(--ease),transform 240ms var(--ease),visibility 240ms var(--ease);
}
.nav-item--mega:hover .mega-panel,
.nav-item--mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col h4{font-size:13px;letter-spacing:.06em;color:var(--ink-500);text-transform:uppercase;margin-bottom:14px}
.mega-links li+li{margin-top:8px}
.mega-links a{font-size:14px;color:var(--ink-700);transition:color 240ms var(--ease)}
.mega-links a:hover{color:var(--ink-900);text-decoration:underline;text-underline-offset:4px}
.mega-note{font-size:14px;line-height:1.7;color:var(--ink-500);margin-bottom:14px}
.mega-card{display:block;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:border-color 240ms var(--ease),box-shadow 240ms var(--ease)}
.mega-card:hover{border-color:rgba(11,13,14,.24);box-shadow:var(--shadow-hover)}
.mega-card img{border-radius:0;aspect-ratio:16/10;object-fit:cover;width:100%}
.mega-card-body{padding:14px}
.mega-card-body p{font-size:13px;line-height:1.6;color:var(--ink-500);margin-bottom:12px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:999px;
  padding:13px 26px;
  font-size:15px;
  font-weight:650;
  border:1px solid transparent;
  cursor:pointer;
  background:none;
  transition:background-color 240ms var(--ease),color 240ms var(--ease),transform 240ms var(--ease),border-color 240ms var(--ease),box-shadow 240ms var(--ease);
}
.btn--primary{background:var(--brand);color:var(--ink-900)}
.btn--primary:hover{background:#b9e321;transform:translateY(-1px)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{background:transparent;border-color:var(--ink-900);color:var(--ink-900)}
.btn--ghost:hover{background:var(--ink-900);color:var(--paper)}
.btn--light{background:var(--paper);color:var(--ink-900)}
.btn--light:hover{background:var(--brand);transform:translateY(-1px)}
.btn--sm{padding:10px 20px;font-size:14px}
.btn--xs{padding:7px 15px;font-size:13px}
.btn--text{padding:0;font-size:15px;font-weight:650;color:var(--ink-900)}
.btn--text .arrow{display:inline-block;transition:transform 240ms var(--ease)}
.btn--text:hover .arrow{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:var(--radius-badge);
  font-size:12px;
  letter-spacing:.06em;
  background:var(--paper-2);
  color:var(--ink-700);
  border:1px solid var(--line);
}
.badge--brand{background:var(--brand);color:var(--ink-900);border-color:transparent}
.badge--dark{background:var(--ink-900);color:var(--paper);border-color:transparent}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(246,245,241,.7)}
.crumbs a{transition:color 240ms var(--ease)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{opacity:.5}
.crumbs .current{color:var(--paper)}

/* ---------- 分类 Hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:var(--paper);
  padding:40px 0 60px;
  min-height:280px;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  opacity:.18;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{color:#fff;margin:24px 0 16px;max-width:900px;font-size:clamp(30px,4.4vw,52px)}
.page-hero .hero-sub{font-size:17px;line-height:1.8;color:rgba(246,245,241,.78);max-width:640px}
.hero-scale{margin-top:36px;height:1px;background:linear-gradient(90deg,var(--brand),rgba(200,241,53,0) 70%)}

/* ---------- 数据刻度条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;background:#fff}
.stat{padding:26px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat-value{display:block;font-size:clamp(24px,2.4vw,32px);font-weight:800;line-height:1.1}
.stat-label{display:block;margin-top:8px;font-size:13px;letter-spacing:.06em;color:var(--ink-500)}

/* ---------- 时间轴 ---------- */
.timeline-figure{margin-bottom:48px;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;background:#fff}
.timeline-figure img{width:100%;aspect-ratio:21/8;object-fit:cover;border-radius:0}
.timeline-figure figcaption{padding:14px 20px;font-size:13px;color:var(--ink-500)}
.timeline-list{position:relative}
.timeline-list::before{
  content:"";
  position:absolute;
  left:16px;
  top:14px;
  bottom:14px;
  width:1px;
  background:linear-gradient(180deg,rgba(11,13,14,.22),rgba(11,13,14,.08));
}
.step{position:relative;padding-left:68px;margin-bottom:28px}
.step:last-child{margin-bottom:0}
.step-dot{
  position:absolute;
  left:0;
  top:6px;
  width:32px;height:32px;
  border-radius:50%;
  background:var(--ink-900);
  color:var(--brand);
  font-size:12px;
  font-weight:700;
  display:grid;
  place-items:center;
  z-index:1;
}
.step-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 30px;
  transition:border-color 240ms var(--ease),box-shadow 240ms var(--ease),transform 240ms var(--ease);
}
.step-card:hover{border-color:rgba(11,13,14,.24);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.step-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:10px}
.step-head h3{font-size:20px}
.step-card p{color:var(--ink-500);font-size:16px}
.step-points{margin-top:16px;display:grid;gap:8px}
.step-points li{position:relative;padding-left:18px;font-size:15px;color:var(--ink-700)}
.step-points li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:1.6px;background:var(--brand-deep)}

/* ---------- 列表行 ---------- */
.row-list{border-top:1px solid var(--line)}
.row{
  display:grid;
  grid-template-columns:72px 1fr auto;
  align-items:center;
  gap:24px;
  padding:24px 12px;
  border-bottom:1px solid var(--line);
  transition:background-color 240ms var(--ease),padding-left 240ms var(--ease);
}
.row:hover{background:var(--paper-2);padding-left:20px}
.row-index{font-size:13px;font-weight:700;color:var(--ink-300)}
.row h3{font-size:19px;margin-bottom:6px}
.row p{font-size:15px;color:var(--ink-500);max-width:760px}
.row-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}

/* ---------- 深色提示块 ---------- */
.dark-band{background:var(--brand-deep);color:var(--paper);border-radius:20px;padding:48px 44px}
.dark-band h2{color:#fff;max-width:640px}
.dark-band .lead{color:rgba(246,245,241,.72)}
.band-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:40px}
.band-item{padding:0 28px;border-left:1px solid rgba(246,245,241,.18)}
.band-item:first-child{border-left:0;padding-left:0}
.band-item .mark{display:block;font-size:13px;letter-spacing:.06em;color:var(--brand);margin-bottom:12px}
.band-item h4{color:#fff;margin-bottom:8px}
.band-item p{font-size:15px;color:rgba(246,245,241,.72)}
.band-note{margin-top:36px;padding-top:24px;border-top:1px solid rgba(246,245,241,.18);font-size:15px;color:rgba(246,245,241,.72)}

/* ---------- FAQ ---------- */
.faq{display:grid;grid-template-columns:4fr 8fr;gap:48px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  min-height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:16px 4px;
  background:none;
  border:0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  cursor:pointer;
  transition:color 240ms var(--ease);
}
.faq-q:hover{color:var(--brand-deep)}
.faq-icon{
  flex:0 0 auto;
  width:24px;height:24px;
  position:relative;
  transition:transform 280ms var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--ink-900);
  transition:background-color 240ms var(--ease);
}
.faq-icon::before{left:0;top:11px;width:24px;height:1.6px}
.faq-icon::after{left:11px;top:0;width:1.6px;height:24px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{
  max-height:0;
  overflow:hidden;
  opacity:0;
  transition:max-height 280ms var(--ease),opacity 280ms var(--ease);
}
.faq-item.is-open .faq-a{opacity:1}
.faq-a p{padding:0 4px 20px;font-size:15px;color:var(--ink-500);max-width:820px}

/* ---------- CTA ---------- */
.cta-band{background:var(--brand-deep);color:var(--paper);padding:88px 0}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.cta-grid h2{color:#fff;max-width:520px}
.cta-grid .lead{color:rgba(246,245,241,.74)}
.cta-fields{margin-top:28px;display:grid;gap:22px}
.field{position:relative}
.field input{
  width:100%;
  background:transparent;
  border:0;
  border-bottom:1px solid rgba(246,245,241,.32);
  padding:16px 0 10px;
  color:var(--paper);
  outline:none;
  transition:border-color 240ms var(--ease);
}
.field input::placeholder{color:transparent}
.field label{
  position:absolute;
  left:0;
  top:16px;
  font-size:15px;
  color:rgba(246,245,241,.62);
  pointer-events:none;
  transition:transform 240ms var(--ease),font-size 240ms var(--ease),color 240ms var(--ease);
}
.field input:focus{border-color:var(--brand)}
.field input:focus+label,
.field input:not(:placeholder-shown)+label{transform:translateY(-18px);font-size:12px;letter-spacing:.06em;color:var(--brand)}
.field.has-error input{border-color:var(--accent)}
.field .field-error{display:none;margin-top:6px;font-size:12px;color:var(--accent)}
.field.has-error .field-error{display:block}
.form-actions{margin-top:32px;display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.privacy{font-size:13px;color:rgba(246,245,241,.6)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(246,245,241,.72);padding-top:72px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand .brand{color:var(--paper);margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;max-width:320px}
.footer-col{border-left:1px solid rgba(246,245,241,.10);padding-left:32px}
.footer-col h4{color:var(--paper);font-size:14px;letter-spacing:.06em;margin-bottom:16px}
.footer-col li+li{margin-top:10px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(246,245,241,.72);transition:color 240ms var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-top:56px;
  padding-top:20px;
  padding-bottom:28px;
  border-top:1px solid rgba(246,245,241,.10);
  font-size:13px;
  color:rgba(246,245,241,.56);
}
.to-top{color:rgba(246,245,241,.72);transition:color 240ms var(--ease)}
.to-top:hover{color:var(--brand)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 600ms var(--ease),transform 600ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  :root{--container:1280px}
}
@media (max-width:1199px){
  :root{--container:960px}
  .mega-panel{width:700px;grid-template-columns:1fr 1fr}
  .mega-col:last-child{display:none}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .section{padding:72px 0}
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    width:min(88vw,380px);
    margin-left:0;
    background:var(--ink-900);
    color:var(--paper);
    padding:96px 24px 40px;
    overflow-y:auto;
    transform:translateX(100%);
    transition:transform 320ms var(--ease);
    z-index:70;
  }
  .main-nav.is-open{transform:translateX(0)}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item>a{color:var(--paper);padding:16px 8px;border-bottom:1px solid rgba(246,245,241,.10);border-radius:0;font-size:16px}
  .nav-item>a::after{display:none}
  .mega-panel{
    position:static;
    width:auto;
    opacity:1;
    visibility:visible;
    transform:none;
    display:block;
    background:transparent;
    border:0;
    box-shadow:none;
    padding:12px 8px 20px;
  }
  .mega-col+.mega-col{margin-top:20px}
  .mega-col h4{color:var(--brand)}
  .mega-col p,.mega-links a{color:rgba(246,245,241,.72)}
  .mega-links a{font-size:14px}
  .mega-card{display:none}
  .header-actions .btn--primary{display:none}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .faq{grid-template-columns:1fr;gap:24px}
  .band-grid{grid-template-columns:1fr;gap:24px}
  .band-item{border-left:0;padding:0;border-top:1px solid rgba(246,245,241,.18);padding-top:20px}
  .band-item:first-child{border-top:0;padding-top:0}
  .cta-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .footer-col{border-left:0;padding-left:0}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
  .header-inner{min-height:66px;gap:12px}
  .brand{font-size:16px}
  .page-hero{padding:28px 0 48px;min-height:0}
  .page-hero h1{font-size:clamp(26px,7vw,34px);margin:16px 0 12px}
  .page-hero .hero-sub{font-size:15px}
  .stats{grid-template-columns:1fr;border-radius:12px}
  .stat{border-right:0;border-bottom:1px solid var(--line);padding:20px}
  .stat:last-child{border-bottom:0}
  .timeline-figure img{aspect-ratio:16/9}
  .timeline-list::before{left:16px}
  .step{padding-left:48px;margin-bottom:20px}
  .step-dot{width:30px;height:30px;left:1px;font-size:11px}
  .step-card{padding:20px 18px}
  .step-head h3{font-size:18px}
  .row{grid-template-columns:1fr;gap:12px;padding:20px 4px}
  .row-tags{justify-content:flex-start}
  .dark-band{padding:32px 22px;border-radius:16px}
  .cta-band{padding:64px 0}
  .cta-grid{gap:32px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --ink-900:#0B0D0E;
  --ink-800:#14181A;
  --ink-700:#1F2528;
  --ink-500:#5A6469;
  --ink-300:#9AA4A8;
  --line:rgba(11,13,14,.10);
  --line-strong:rgba(11,13,14,.22);
  --paper:#F6F5F1;
  --paper-2:#ECEAE4;
  --brand:#C8F135;
  --brand-soft:rgba(200,241,53,.18);
  --brand-deep:#17453A;
  --accent:#FF6A2B;
  --radius-s:6px;
  --radius-m:14px;
  --radius-pill:999px;
  --shadow-hover:0 12px 32px rgba(11,13,14,.10);
  --ease:cubic-bezier(.2,.8,.2,1);
  --container:1280px;
  --gutter:32px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:750;letter-spacing:-.01em;line-height:1.2}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 var(--gutter);
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,245,241,.92);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:32px;
  min-height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:18px;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-mark{
  width:12px;
  height:12px;
  background:var(--brand);
  border-radius:3px;
  box-shadow:0 0 0 1px rgba(11,13,14,.14) inset;
  flex:0 0 auto;
}
.main-nav{margin-left:auto}
.nav-list{
  display:flex;
  align-items:center;
  gap:4px;
}
.nav-item{position:relative}
.nav-item > a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:10px 12px;
  font-size:15px;
  font-weight:600;
  color:var(--ink-700);
  border-radius:var(--radius-s);
  transition:color .24s var(--ease),background .24s var(--ease);
  position:relative;
}
.nav-item > a::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:4px;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-item > a:hover{color:var(--ink-900)}
.nav-item > a:hover::after,
.nav-item.is-active > a::after{transform:scaleX(1)}
.nav-item.is-active > a{color:var(--ink-900)}
.caret{
  width:7px;height:7px;
  border-right:1.6px solid currentColor;
  border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translate(-1px,-1px);
  transition:transform .24s var(--ease);
}
.nav-item--mega:hover .caret{transform:rotate(225deg) translate(-2px,-2px)}

.mega-panel{
  position:absolute;
  top:calc(100% + 10px);
  right:0;
  width:780px;
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:24px;
  padding:24px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  box-shadow:var(--shadow-hover);
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.nav-item--mega:hover .mega-panel,
.nav-item--mega:focus-within .mega-panel{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.mega-col h4{
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--ink-500);
  margin-bottom:12px;
}
.mega-links li + li{margin-top:8px}
.mega-links a{
  font-size:14.5px;
  color:var(--ink-700);
  transition:color .24s var(--ease);
}
.mega-links a:hover{color:var(--ink-900);text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:4px}
.mega-note{font-size:13.5px;line-height:1.7;color:var(--ink-500);margin-bottom:14px}
.mega-card{
  display:block;
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  overflow:hidden;
  transition:box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.mega-card:hover{box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.mega-card-body{padding:12px}
.mega-card-body p{font-size:13px;line-height:1.7;color:var(--ink-500);margin-bottom:10px}

.header-actions{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--radius-pill);
  font-weight:650;
  font-size:15px;
  padding:12px 22px;
  border:1px solid transparent;
  transition:background .24s var(--ease),color .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:var(--ink-900)}
.btn--primary:hover{background:#bce42a;transform:translateY(-1px)}
.btn--ghost{border-color:var(--line-strong);color:var(--ink-900)}
.btn--ghost:hover{background:var(--ink-900);color:var(--paper);border-color:var(--ink-900)}
.btn--sm{padding:9px 16px;font-size:14px}
.btn--xs{padding:7px 14px;font-size:13px}
.btn--light{background:var(--paper);color:var(--ink-900)}
.btn--light:hover{background:#fff;transform:translateY(-1px)}
.btn--outline-light{border-color:rgba(246,245,241,.5);color:var(--paper)}
.btn--outline-light:hover{background:rgba(246,245,241,.12)}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:650;
  font-size:15px;
  color:var(--ink-900);
}
.link-arrow span.aro{transition:transform .24s var(--ease)}
.link-arrow:hover span.aro{transform:translateX(4px)}
.link-arrow:hover{text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:5px}

.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- category hero ---------- */
.cat-hero{
  position:relative;
  background-color:var(--ink-900);
  color:var(--paper);
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  opacity:.24;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(246,245,241,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(246,245,241,.06) 1px,transparent 1px);
  background-size:64px 64px,64px 64px;
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2;padding-top:44px;padding-bottom:48px}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(246,245,241,.66);
  margin-bottom:22px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.breadcrumb a{color:rgba(246,245,241,.82);transition:color .24s var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .cur{color:rgba(246,245,241,.95)}
.cat-hero h1{
  font-size:clamp(30px,4vw,48px);
  line-height:1.14;
  font-weight:800;
  max-width:900px;
}
.cat-hero h1 em{
  font-style:normal;
  color:var(--brand);
}
.cat-lead{
  margin-top:18px;
  max-width:760px;
  font-size:16.5px;
  line-height:1.85;
  color:rgba(246,245,241,.8);
}
.cat-hero-actions{
  margin-top:28px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.cat-hero-meta{
  margin-top:34px;
  display:flex;
  flex-wrap:wrap;
  gap:12px 40px;
  padding-top:20px;
  border-top:1px solid rgba(246,245,241,.16);
}
.cat-hero-meta div{min-width:150px}
.cat-hero-meta .k{font-size:12px;letter-spacing:.06em;color:rgba(246,245,241,.55);text-transform:uppercase}
.cat-hero-meta .v{font-size:20px;font-weight:750;color:var(--brand);margin-top:2px}

/* ---------- bands ---------- */
.band{padding:96px 0}
.band--tight{padding:72px 0}
.band--paper2{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:44px;
}
.band-head h2{font-size:clamp(26px,3vw,40px);font-weight:750}
.band-head p{margin-top:12px;max-width:640px;color:var(--ink-500);font-size:15.5px;line-height:1.85}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--ink-500);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand)}

/* ---------- wall grid (2 x 3) ---------- */
.wall-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.wall-card{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  overflow:hidden;
  background:#fff;
  transition:box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.wall-card:hover{box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.wall-media{overflow:hidden;background:var(--paper-2)}
.wall-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s var(--ease)}
.wall-card:hover .wall-media img{transform:scale(1.04)}
.wall-index{
  position:absolute;
  top:14px;left:14px;
  z-index:2;
  padding:5px 10px;
  border-radius:var(--radius-s);
  background:var(--ink-900);
  color:var(--brand);
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  font-variant-numeric:tabular-nums;
}
.wall-bar{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:18px 20px 20px;
  background:linear-gradient(to top,rgba(11,13,14,.94) 0%,rgba(11,13,14,.72) 62%,rgba(11,13,14,0) 100%);
  color:var(--paper);
  transform:translateY(0);
  transition:transform .32s var(--ease);
}
.wall-card:hover .wall-bar{transform:translateY(-4px)}
.wall-bar h3{font-size:20px;font-weight:700}
.wall-bar p{
  margin-top:0;
  font-size:14px;
  line-height:1.75;
  color:rgba(246,245,241,.82);
  max-height:0;
  opacity:0;
  overflow:hidden;
  transition:max-height .36s var(--ease),opacity .3s var(--ease),margin-top .3s var(--ease);
}
.wall-card:hover .wall-bar p,
.wall-card:focus-within .wall-bar p{max-height:96px;opacity:1;margin-top:8px}
.wall-tagline{
  display:inline-block;
  margin-top:10px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--brand);
}

/* ---------- check list ---------- */
.check-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 48px;
  border-top:1px solid var(--line);
}
.check-item{
  display:flex;
  gap:18px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
.check-num{
  flex:0 0 auto;
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--ink-300);
  font-variant-numeric:tabular-nums;
  padding-top:4px;
  min-width:34px;
}
.check-item h3{font-size:18px;font-weight:650;margin-bottom:6px}
.check-item p{font-size:15px;line-height:1.8;color:var(--ink-500)}

/* ---------- stat strip ---------- */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
  padding:32px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat-strip .stat{padding-right:24px;border-right:1px solid var(--line)}
.stat-strip .stat:last-child{border-right:0;padding-right:0}
.stat .n{
  font-size:clamp(28px,3.4vw,42px);
  font-weight:800;
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
  line-height:1.1;
}
.stat .n small{font-size:16px;font-weight:700;color:var(--ink-500);margin-left:4px}
.stat .l{margin-top:8px;font-size:14px;color:var(--ink-500)}

/* ---------- scenario rows ---------- */
.scene-list{border-top:1px solid var(--line)}
.scene-row{
  display:grid;
  grid-template-columns:220px 1fr auto;
  gap:32px;
  align-items:center;
  padding:26px 0;
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.scene-row:hover{background:rgba(200,241,53,.08)}
.scene-row h3{font-size:19px;font-weight:650}
.scene-row p{font-size:15px;line-height:1.8;color:var(--ink-500)}
.badge{
  display:inline-flex;
  align-items:center;
  padding:5px 12px;
  border-radius:var(--radius-s);
  font-size:12.5px;
  font-weight:650;
  letter-spacing:.04em;
  background:var(--brand-soft);
  color:var(--brand-deep);
  white-space:nowrap;
}
.badge--ink{background:var(--ink-900);color:var(--paper)}
.badge--warn{background:rgba(255,106,43,.14);color:#B8410E}

/* ---------- faq ---------- */
.faq-layout{
  display:grid;
  grid-template-columns:4fr 8fr;
  gap:48px;
  align-items:start;
}
.faq-side h2{font-size:clamp(26px,3vw,36px);font-weight:750}
.faq-side p{margin-top:16px;font-size:15px;line-height:1.85;color:var(--ink-500)}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
  min-height:64px;
  padding:14px 0;
  text-align:left;
  font-size:17px;
  font-weight:650;
  transition:color .24s var(--ease);
}
.faq-q:hover{color:var(--brand-deep)}
.faq-icon{
  position:relative;
  flex:0 0 auto;
  width:20px;height:20px;
  transition:transform .28s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--ink-900);
  border-radius:2px;
}
.faq-icon::before{left:0;right:0;top:9px;height:2px}
.faq-icon::after{top:0;bottom:0;left:9px;width:2px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-item.is-open .faq-q{color:var(--ink-900)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s var(--ease);
}
.faq-a p{
  padding:0 40px 22px 0;
  font-size:15.5px;
  line-height:1.9;
  color:var(--ink-500);
}

/* ---------- cta ---------- */
.cta-band{
  background:linear-gradient(120deg,#17453A 0%,#12382F 55%,#0E2A24 100%);
  color:var(--paper);
  padding:84px 0;
}
.cta-inner{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
}
.cta-inner h2{font-size:clamp(26px,3vw,40px);font-weight:750;line-height:1.2}
.cta-inner p{margin-top:16px;font-size:16px;line-height:1.85;color:rgba(246,245,241,.78);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.cta-panel{
  border:1px solid rgba(246,245,241,.2);
  border-radius:var(--radius-m);
  padding:28px;
  background:rgba(11,13,14,.24);
}
.cta-panel h3{font-size:18px;font-weight:650;margin-bottom:18px}
.field{position:relative;margin-bottom:22px}
.field label{
  display:block;
  font-size:12.5px;
  letter-spacing:.06em;
  color:rgba(246,245,241,.62);
  margin-bottom:6px;
}
.field input{
  width:100%;
  padding:9px 2px;
  background:transparent;
  border:0;
  border-bottom:1px solid rgba(246,245,241,.32);
  color:var(--paper);
  font-size:15.5px;
  transition:border-color .24s var(--ease);
}
.field input::placeholder{color:rgba(246,245,241,.4)}
.field input:focus{outline:none;border-bottom-color:var(--brand)}
.field.has-error input{border-bottom-color:var(--accent)}
.field .err{
  display:none;
  margin-top:6px;
  font-size:12px;
  color:var(--accent);
}
.field.has-error .err{display:block}
.cta-note{margin-top:14px;font-size:12.5px;color:rgba(246,245,241,.55);line-height:1.7}
.form-status{
  margin-top:14px;
  font-size:13.5px;
  color:var(--brand);
  min-height:20px;
}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-900);
  color:rgba(246,245,241,.78);
  padding-top:72px;
  font-size:14.5px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand .brand{color:var(--paper);font-size:18px;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(246,245,241,.6);max-width:340px}
.footer-col h4{
  font-size:13px;
  letter-spacing:.06em;
  color:rgba(246,245,241,.5);
  margin-bottom:16px;
  font-weight:650;
}
.footer-col li + li{margin-top:10px}
.footer-col a,.footer-col span{color:rgba(246,245,241,.78);font-size:14.5px;transition:color .24s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-grid > *{padding-right:32px;border-right:1px solid rgba(246,245,241,.1)}
.footer-grid > *:last-child{border-right:0;padding-right:0}
.footer-bottom{
  margin-top:56px;
  padding:22px var(--gutter);
  border-top:1px solid rgba(246,245,241,.12);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13.5px;
  color:rgba(246,245,241,.55);
}
.to-top{color:rgba(246,245,241,.75);transition:color .24s var(--ease)}
.to-top:hover{color:var(--brand)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
}

/* ---------- responsive ---------- */
@media (max-width:1439px){
  :root{--container:1140px}
}
@media (max-width:1199px){
  :root{--container:960px}
  .nav-item > a{padding:10px 8px;font-size:14.5px}
  .mega-panel{width:700px}
  .scene-row{grid-template-columns:180px 1fr auto;gap:24px}
}
@media (max-width:1023px){
  :root{--gutter:24px}
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;
    inset:72px 0 auto 0;
    background:var(--ink-900);
    border-top:1px solid rgba(246,245,241,.1);
    padding:16px 24px 28px;
    max-height:calc(100vh - 72px);
    overflow-y:auto;
    display:none;
  }
  .main-nav.is-open{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{border-bottom:1px solid rgba(246,245,241,.1)}
  .nav-item > a{color:rgba(246,245,241,.88);padding:16px 0;font-size:16px;justify-content:space-between}
  .nav-item > a::after{display:none}
  .nav-item.is-active > a{color:var(--brand)}
  .mega-panel{
    position:static;
    width:auto;
    opacity:1;
    visibility:visible;
    transform:none;
    display:block;
    background:rgba(246,245,241,.04);
    border:1px solid rgba(246,245,241,.12);
    box-shadow:none;
    padding:16px;
    margin-bottom:16px;
  }
  .mega-col + .mega-col{margin-top:20px}
  .mega-col h4{color:rgba(246,245,241,.5)}
  .mega-links a{color:rgba(246,245,241,.8)}
  .mega-note{color:rgba(246,245,241,.6)}
  .mega-card-body p{color:rgba(246,245,241,.6)}
  .header-actions .btn--ghost{display:none}
  .band{padding:72px 0}
  .band--tight{padding:56px 0}
  .wall-grid{gap:20px}
  .check-grid{grid-template-columns:1fr;gap:0}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .cta-inner{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid > *{border-right:0;padding-right:0}
  .scene-row{grid-template-columns:1fr;gap:12px}
}
@media (max-width:767px){
  :root{--gutter:20px}
  body{font-size:16px;line-height:1.8}
  .header-inner{min-height:64px;gap:16px}
  .brand{font-size:16px}
  .main-nav{inset:64px 0 auto 0;max-height:calc(100vh - 64px)}
  .header-actions .btn--primary{padding:8px 14px;font-size:13.5px}
  .cat-hero .container{padding-top:30px;padding-bottom:36px}
  .cat-hero-meta{gap:16px 24px}
  .cat-hero-meta .v{font-size:17px}
  .band{padding:56px 0}
  .band-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:32px}
  .wall-grid{grid-template-columns:1fr}
  .wall-bar p{max-height:96px;opacity:1;margin-top:8px}
  .stat-strip{grid-template-columns:1fr;gap:0}
  .stat-strip .stat{border-right:0;border-bottom:1px solid var(--line);padding:18px 0}
  .stat-strip .stat:last-child{border-bottom:0}
  .faq-q{font-size:15.5px}
  .faq-a p{padding-right:0;font-size:15px}
  .cta-band{padding:56px 0}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .brand-text{font-size:15px}
  .cat-hero-actions .btn{width:100%}
  .cta-actions{gap:10px}
  .cta-actions .btn{width:100%}
}

/* roulang page: category4 */
:root{
  --ink-900:#0B0D0E;
  --ink-800:#14181A;
  --ink-700:#1F2528;
  --ink-500:#5A6469;
  --ink-300:#9AA4A8;
  --line:rgba(11,13,14,.10);
  --line-strong:rgba(11,13,14,.22);
  --paper:#F6F5F1;
  --paper-2:#ECEAE4;
  --brand:#C8F135;
  --brand-hover:#BCE22B;
  --brand-deep:#17453A;
  --accent:#FF6A2B;
  --radius-card:14px;
  --radius-badge:6px;
  --shadow-hover:0 12px 32px rgba(11,13,14,.10);
  --ease:cubic-bezier(.2,.8,.2,1);
  --container:1280px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  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:750;line-height:1.15;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,245,241,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:32px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.01em;flex-shrink:0}
.brand-mark{width:12px;height:12px;background:var(--brand);border-radius:3px;display:inline-block}
.brand-text{white-space:nowrap}
.main-nav{flex:1}
.nav-list{display:flex;align-items:center;gap:4px}
.nav-item{position:relative}
.nav-item>a{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 12px;font-size:15px;font-weight:550;color:var(--ink-700);
  border-radius:8px;position:relative;transition:color .24s var(--ease);
}
.nav-item>a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-item>a:hover{color:var(--ink-900)}
.nav-item>a:hover::after,.nav-item.is-active>a::after{transform:scaleX(1)}
.nav-item.is-active>a{color:var(--ink-900);font-weight:650}
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;display:inline-block;transition:transform .24s var(--ease)}
.nav-item--mega:hover .caret{transform:rotate(180deg)}
.mega-panel{
  position:absolute;top:calc(100% + 12px);right:-140px;width:820px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:0 24px 60px rgba(11,13,14,.14);
  padding:28px;display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:28px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.nav-item--mega:hover .mega-panel,.nav-item--mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col h4{font-size:13px;letter-spacing:.06em;color:var(--ink-300);text-transform:uppercase;margin-bottom:14px;font-weight:650}
.mega-links li+li{margin-top:10px}
.mega-links a{font-size:14.5px;color:var(--ink-700);transition:color .24s var(--ease)}
.mega-links a:hover{color:var(--ink-900);text-decoration:underline;text-underline-offset:4px}
.mega-note{font-size:13.5px;line-height:1.7;color:var(--ink-500);margin-bottom:14px}
.mega-card{display:block;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:box-shadow .24s var(--ease),border-color .24s var(--ease)}
.mega-card:hover{box-shadow:var(--shadow-hover);border-color:var(--line-strong)}
.mega-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.mega-card-body{padding:14px 16px 18px}
.mega-card-body p{font-size:13.5px;line-height:1.7;color:var(--ink-500);margin-bottom:12px}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-strong);background:transparent;
  border-radius:10px;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:650;padding:13px 26px;line-height:1.2;
  transition:background-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.btn--primary{background:var(--brand);color:var(--ink-900)}
.btn--primary:hover{background:var(--brand-hover);transform:translateY(-1px)}
.btn--ghost{background:transparent;border-color:var(--ink-900);color:var(--ink-900)}
.btn--ghost:hover{background:var(--ink-900);color:var(--paper)}
.btn--on-dark{background:var(--brand);color:var(--ink-900)}
.btn--on-dark:hover{background:var(--brand-hover);transform:translateY(-1px)}
.btn--outline-light{background:transparent;border-color:rgba(246,245,241,.5);color:var(--paper)}
.btn--outline-light:hover{background:var(--paper);color:var(--ink-900);border-color:var(--paper)}
.btn--sm{padding:10px 20px;font-size:14px}
.btn--xs{padding:7px 15px;font-size:13px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.4;pointer-events:none}
.text-link{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--ink-900)}
.text-link .arrow{transition:transform .24s var(--ease)}
.text-link:hover .arrow{transform:translateX(4px)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(246,245,241,.94),rgba(246,245,241,.99)),
    url("/assets/images/backpic/back-2.png") center/cover no-repeat;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;opacity:.6;pointer-events:none;
}
.page-hero .container{position:relative;padding-top:56px;padding-bottom:56px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:22px}
.breadcrumb a{transition:color .24s var(--ease)}
.breadcrumb a:hover{color:var(--ink-900);text-decoration:underline;text-underline-offset:4px}
.breadcrumb .sep{color:var(--ink-300)}
.breadcrumb .current{color:var(--ink-700);font-weight:600}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.06em;
  color:var(--brand-deep);background:rgba(200,241,53,.35);border-radius:var(--radius-badge);
  padding:6px 12px;font-weight:650;margin-bottom:18px;
}
.page-hero h1{font-size:clamp(32px,4.2vw,54px);line-height:1.08;font-weight:800;max-width:15em}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.8;color:var(--ink-500);max-width:44em}
.hero-meta{display:flex;flex-wrap:wrap;gap:28px;margin-top:28px}
.hero-meta div{min-width:120px}
.hero-meta strong{display:block;font-size:26px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.hero-meta span{font-size:13px;color:var(--ink-500)}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section--alt{background:var(--paper-2)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px}
.section-head h2{font-size:clamp(26px,3vw,38px)}
.section-head p{margin-top:12px;font-size:16px;color:var(--ink-500);max-width:52em}
.section-tag{font-size:12.5px;letter-spacing:.06em;font-weight:650;color:var(--ink-500);border:1px solid var(--line-strong);border-radius:var(--radius-badge);padding:5px 10px;display:inline-block;margin-bottom:14px}

/* ---------- intro / step strip ---------- */
.intro-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.intro-text h2{font-size:clamp(24px,2.6vw,34px);margin-bottom:18px}
.intro-text p{color:var(--ink-500);font-size:16.5px}
.intro-text p+p{margin-top:16px}
.step-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.step-strip li{padding:4px 26px;border-left:1px solid var(--line-strong)}
.step-strip li:first-child{border-left:0;padding-left:0}
.step-num{display:block;font-size:13px;font-weight:700;color:var(--brand-deep);font-variant-numeric:tabular-nums;letter-spacing:.08em;margin-bottom:12px}
.step-strip h3{font-size:18px;margin-bottom:10px}
.step-strip p{font-size:15px;line-height:1.75;color:var(--ink-500)}

/* ---------- table ---------- */
.table-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden}
.table-scroll{overflow-x:auto}
.compare-table{width:100%;border-collapse:collapse;min-width:820px;font-size:15px}
.compare-table caption{text-align:left;padding:24px 26px 6px;font-size:15px;color:var(--ink-500)}
.compare-table thead th{
  background:var(--ink-900);color:var(--paper);text-align:left;
  padding:16px 22px;font-size:13.5px;font-weight:650;letter-spacing:.05em;white-space:nowrap;
}
.compare-table tbody td{padding:18px 22px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink-700);line-height:1.7}
.compare-table tbody tr:nth-child(odd){background:rgba(236,234,228,.45)}
.compare-table tbody tr:hover{background:rgba(200,241,53,.14)}
.compare-table tbody tr:last-child td{border-bottom:0}
.cell-strong{font-weight:650;color:var(--ink-900)}
.cell-time{font-variant-numeric:tabular-nums;white-space:nowrap;color:var(--ink-900);font-weight:600}
.cell-link{color:var(--brand-deep);font-weight:600;white-space:nowrap;border-bottom:1px solid rgba(23,69,58,.3);transition:color .24s var(--ease),border-color .24s var(--ease)}
.cell-link:hover{color:var(--ink-900);border-color:var(--ink-900)}
.table-note{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;padding:22px 26px;border-top:1px solid var(--line);background:var(--paper-2);font-size:14px;color:var(--ink-500)}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-aside h2{font-size:clamp(24px,2.6vw,34px);margin-bottom:18px}
.faq-aside p{font-size:15.5px;color:var(--ink-500);margin-bottom:26px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:18px 4px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:650;color:var(--ink-900);line-height:1.5;
  transition:color .24s var(--ease);
}
.faq-q:hover{color:var(--brand-deep)}
.faq-icon{
  position:relative;flex-shrink:0;width:26px;height:26px;border:1px solid var(--line-strong);border-radius:50%;
  transition:transform .28s var(--ease),border-color .28s var(--ease),background-color .28s var(--ease);
}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--ink-900);transform:translate(-50%,-50%)}
.faq-icon::before{width:11px;height:1.6px}
.faq-icon::after{width:1.6px;height:11px}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--brand);border-color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.faq-a-inner{padding:0 44px 24px 4px;font-size:15.5px;line-height:1.85;color:var(--ink-500)}
.faq-a-inner strong{color:var(--ink-900)}

/* ---------- cta ---------- */
.cta-band{
  background:linear-gradient(135deg,var(--brand-deep),#0F2E27);
  color:var(--paper);padding:80px 0;
}
.cta-inner{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.cta-inner h2{font-size:clamp(26px,3.2vw,42px);color:var(--paper);line-height:1.15}
.cta-inner p{margin-top:16px;font-size:16px;color:rgba(246,245,241,.78);max-width:36em}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-privacy{grid-column:1/-1;font-size:13px;color:rgba(246,245,241,.6);border-top:1px solid rgba(246,245,241,.16);padding-top:20px;margin-top:8px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(246,245,241,.78);padding:72px 0 0;font-size:15px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:0}
.footer-col,.footer-brand{padding:0 28px;border-left:1px solid rgba(246,245,241,.12)}
.footer-brand{border-left:0;padding-left:0}
.footer-brand .brand{color:var(--paper);margin-bottom:16px}
.footer-brand p{font-size:14.5px;line-height:1.8;color:rgba(246,245,241,.62);max-width:26em}
.footer-col h4{font-size:13px;letter-spacing:.06em;color:rgba(246,245,241,.5);font-weight:650;margin-bottom:18px}
.footer-col li+li{margin-top:12px}
.footer-col a{color:rgba(246,245,241,.82);transition:color .24s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-col span{color:rgba(246,245,241,.62)}
.footer-bottom{
  margin-top:56px;padding-top:24px;padding-bottom:28px;border-top:1px solid rgba(246,245,241,.12);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13.5px;color:rgba(246,245,241,.55);
}
.to-top{color:rgba(246,245,241,.75);transition:color .24s var(--ease)}
.to-top:hover{color:var(--brand)}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1439px){:root{--container:1140px}}
@media (max-width:1199px){
  :root{--container:960px}
  .mega-panel{width:720px;right:-80px;grid-template-columns:1fr 1fr}
  .mega-col:last-child{display:none}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:68px;right:0;bottom:0;width:min(88vw,360px);
    background:var(--ink-900);padding:24px 22px 40px;overflow-y:auto;
    transform:translateX(105%);transition:transform .28s var(--ease);z-index:70;
  }
  .main-nav.is-open{transform:translateX(0)}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item>a{color:rgba(246,245,241,.86);padding:16px 4px;font-size:16px;border-bottom:1px solid rgba(246,245,241,.1);width:100%;justify-content:space-between;border-radius:0}
  .nav-item>a:hover{color:var(--paper)}
  .nav-item>a::after{display:none}
  .nav-item.is-active>a{color:var(--brand)}
  .mega-panel{display:none}
  .header-actions .btn--ghost{display:none}
  .intro-grid,.faq-layout,.cta-inner{grid-template-columns:1fr;gap:32px}
  .step-strip{grid-template-columns:1fr}
  .step-strip li{border-left:0;border-top:1px solid var(--line-strong);padding:22px 0 0;margin-top:22px}
  .step-strip li:first-child{margin-top:0;border-top:0;padding-top:0}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-col,.footer-brand{padding:0 0 28px;border-left:0;border-bottom:1px solid rgba(246,245,241,.12);margin-bottom:28px}
  .footer-col:nth-child(2n){padding-left:24px}
  .section{padding:72px 0}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .header-inner{gap:14px;height:62px}
  .brand{font-size:16px}
  .main-nav{top:62px}
  .header-actions .btn--primary{display:none}
  .page-hero .container{padding-top:40px;padding-bottom:40px}
  .hero-meta{gap:20px}
  .hero-meta div{min-width:96px}
  .hero-meta strong{font-size:22px}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .compare-table thead th,.compare-table tbody td{padding:14px 16px}
  .faq-a-inner{padding-right:12px}
  .cta-band{padding:56px 0}
  .footer-grid{grid-template-columns:1fr}
  .footer-col:nth-child(2n){padding-left:0}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}