/* roulang page: index */
/* ===================== 设计变量 ===================== */
:root{
  --primary:#21C7A8;
  --primary-hi:#2FD8B8;
  --primary-deep:#159C83;
  --primary-soft:#E9FAF6;
  --accent:#FF6A3D;
  --ink:#12141C;
  --base:#F6F5F1;
  --surface:#FFFFFF;
  --ink-900:#0F1115;
  --ink-600:#4A4F5A;
  --ink-400:#8A9099;
  --line:rgba(15,17,21,.08);
  --line-strong:rgba(15,17,21,.16);
  --on-dark:#F2F3F5;
  --on-dark-2:rgba(242,243,245,.66);
  --on-dark-3:rgba(242,243,245,.42);
  --on-dark-line:rgba(255,255,255,.10);
  --warn:#E5484D;
  --r-card:18px;
  --r-btn:10px;
  --r-pill:999px;
  --r-block:28px;
  --r-img:14px;
  --sh-1:0 1px 2px rgba(15,17,21,.04), 0 10px 28px -14px rgba(15,17,21,.14);
  --sh-2:0 18px 46px -22px rgba(15,17,21,.28);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Space Grotesk","Inter","Segoe UI",system-ui,sans-serif;
  --section-y:clamp(64px,9vw,140px);
  --container:1240px;
}

/* ===================== 基础 reset ===================== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.85;
  color:var(--ink-600);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{border:0;background:none;cursor:pointer;padding:0;}
table{border-collapse:collapse;width:100%;}
:focus{outline:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(33,199,168,.28);}

/* ===================== 容器与板块 ===================== */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:576px){.container{padding:0 32px;}}
@media (min-width:1024px){.container{padding:0 40px;}}

.section{padding:var(--section-y) 0;}
.section--tight{padding:calc(var(--section-y) * .6) 0;}
.section--plain{background:var(--base);}
.section--paper{background:#FFFDF9;}
.section--dark{background:var(--ink);color:var(--on-dark);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-num);
  font-size:12px;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--primary-deep);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:16px;
  height:1px;
  background:var(--primary);
}
.section--dark .eyebrow{color:var(--primary-hi);}

h1{font-size:clamp(2.25rem,5.2vw,4.25rem);font-weight:800;letter-spacing:-.02em;line-height:1.08;color:var(--ink-900);}
h2{font-size:clamp(1.6rem,3vw,2.5rem);font-weight:800;letter-spacing:-.015em;line-height:1.22;color:var(--ink-900);}
h3{font-size:1.25rem;font-weight:700;line-height:1.4;letter-spacing:-.01em;color:var(--ink-900);}
.section--dark h1,.section--dark h2,.section--dark h3{color:var(--on-dark);}

.lead{
  max-width:640px;
  font-size:1.0625rem;
  line-height:1.85;
  color:var(--ink-600);
}
.section--dark .lead{color:var(--on-dark-2);}
.body-text{max-width:750px;}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:clamp(32px,4vw,56px);
}
.section-head__text{max-width:720px;}
.section-head__lead{margin-top:14px;max-width:640px;font-size:1rem;color:var(--ink-600);}

/* ===================== 按钮体系 ===================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  white-space:nowrap;
  border:1px solid transparent;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.btn svg{width:17px;height:17px;flex:0 0 auto;}
.btn--primary{background:var(--primary);color:#fff;box-shadow:0 1px 2px rgba(15,17,21,.04);}
.btn--primary:hover{background:var(--primary-hi);box-shadow:0 10px 24px -10px rgba(33,199,168,.75);}
.btn--ghost{border-color:var(--line-strong);color:var(--ink-900);background:#fff;}
.btn--ghost:hover{border-color:rgba(33,199,168,.6);background:var(--primary-soft);}
.btn--light{background:#fff;color:var(--ink-900);}
.btn--light:hover{background:#EFFBF8;}
.btn--outline-light{border-color:rgba(255,255,255,.28);color:var(--on-dark);background:transparent;}
.btn--outline-light:hover{border-color:var(--primary);color:#fff;background:rgba(33,199,168,.12);}
.btn--pill{border-radius:var(--r-pill);}
.btn--block{width:100%;}
.btn:active{transform:translateY(1px);box-shadow:none;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

.link-arrow{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--ink-900);
  padding-bottom:3px;
}
.link-arrow::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:1px;width:100%;
  background:var(--primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.link-arrow:hover::after{transform:scaleX(1);}
.link-arrow:hover{color:var(--primary-deep);}

/* ===================== 标签 / 徽章 ===================== */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:var(--r-pill);
  background:var(--primary-soft);
  color:var(--primary-deep);
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  border:1px solid rgba(33,199,168,.22);
}
.tag--accent{background:rgba(255,106,61,.1);color:#D8491F;border-color:rgba(255,106,61,.24);}
.tag--dark{background:rgba(255,255,255,.08);color:var(--on-dark);border-color:var(--on-dark-line);}

.chip-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 16px;
  border-radius:10px;
  border:1px solid var(--line-strong);
  background:#fff;
  font-size:13px;
  font-weight:600;
  color:var(--ink-900);
  transition:border-color .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease);
}
.chip-btn:hover{border-color:rgba(33,199,168,.6);background:var(--primary-soft);color:var(--primary-deep);}

/* ===================== 导航 ===================== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding-top:12px;
  transition:padding .24s var(--ease);
}
.nav-card{
  display:flex;
  align-items:center;
  gap:18px;
  padding:10px 12px 10px 18px;
  border-radius:16px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:0 1px 2px rgba(15,17,21,.04), 0 8px 22px -18px rgba(15,17,21,.32);
  transition:box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-scrolled .nav-card{
  box-shadow:0 1px 2px rgba(15,17,21,.05), 0 16px 34px -20px rgba(15,17,21,.42);
  border-color:rgba(15,17,21,.11);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand__mark{
  width:26px;height:26px;
  flex:0 0 auto;
  display:grid;place-items:center;
  border-radius:8px;
  background:var(--ink);
}
.brand__mark svg{width:15px;height:15px;}
.brand__text{
  font-size:18px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--ink-900);
  line-height:1;
}
.brand__text em{
  font-family:var(--font-num);
  font-style:normal;
  font-weight:500;
  letter-spacing:0;
  color:var(--ink-900);
}

.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:10px 14px;
  border-radius:10px;
  font-size:13px;
  font-weight:600;
  color:var(--ink-600);
  border:1px solid transparent;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-link svg{width:16px;height:16px;opacity:.75;}
.nav-link:hover{background:var(--primary-soft);color:var(--ink-900);}
.nav-link.is-active{
  color:var(--ink-900);
  background:#fff;
  border-color:rgba(33,199,168,.45);
  box-shadow:inset 0 -2px 0 var(--primary);
}
.nav-card .btn{margin-left:8px;}

.nav-toggle{
  display:none;
  margin-left:auto;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid var(--line-strong);
  background:#fff;
  place-items:center;
}
.nav-toggle span{
  display:block;
  width:17px;height:2px;
  background:var(--ink-900);
  border-radius:2px;
  position:relative;
  transition:background-color .2s var(--ease);
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;left:0;
  width:17px;height:2px;border-radius:2px;background:var(--ink-900);
  transition:transform .2s var(--ease);
}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}

/* 移动端抽屉 */
.nav-drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:rgba(18,20,28,.98);
  color:var(--on-dark);
  padding:22px 20px 20px;
  display:flex;
  flex-direction:column;
  opacity:0;
  visibility:hidden;
  transform:translateY(-10px);
  transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease);
}
.nav-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.nav-drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.nav-drawer__close{
  width:44px;height:44px;border-radius:10px;
  border:1px solid var(--on-dark-line);
  display:grid;place-items:center;
}
.nav-drawer__close svg{width:16px;height:16px;stroke:var(--on-dark);}
.nav-drawer__grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.nav-drawer__item{
  display:flex;
  align-items:center;
  gap:10px;
  padding:16px 14px;
  border-radius:14px;
  border:1px solid var(--on-dark-line);
  background:rgba(255,255,255,.04);
  font-size:14px;
  font-weight:600;
  color:var(--on-dark);
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-drawer__item svg{width:18px;height:18px;color:var(--primary);flex:0 0 auto;}
.nav-drawer__item:hover{border-color:rgba(33,199,168,.6);background:rgba(33,199,168,.1);}
.nav-drawer__item.is-active{border-color:var(--primary);background:rgba(33,199,168,.14);}
.nav-drawer__bottom{margin-top:auto;padding-top:20px;}

@media (max-width:900px){
  .nav-links{display:none;}
  .nav-card .btn{display:none;}
  .nav-toggle{display:grid;}
  .nav-card{padding:9px 12px 9px 14px;}
}
@media (max-width:420px){
  .brand__text{font-size:16px;}
  .nav-card{gap:10px;}
}

/* ===================== Hero ===================== */
.hero{
  position:relative;
  margin-top:-76px;
  padding:calc(76px + clamp(56px,9vw,120px)) 0 clamp(60px,8vw,110px);
  background:var(--ink);
  color:var(--on-dark);
  overflow:hidden;
}
.hero__bg{
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
}
.hero__veil{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(18,20,28,.86) 0%,rgba(18,20,28,.78) 45%,rgba(18,20,28,.92) 100%);
}
.hero__stars{
  position:absolute;
  inset:0;
  opacity:.08;
  background-image:
    radial-gradient(1px 1px at 22px 34px,#fff 50%,transparent 51%),
    radial-gradient(1px 1px at 138px 96px,#fff 50%,transparent 51%),
    radial-gradient(1px 1px at 236px 48px,#fff 50%,transparent 51%),
    radial-gradient(1px 1px at 84px 178px,#fff 50%,transparent 51%),
    radial-gradient(1px 1px at 196px 214px,#fff 50%,transparent 51%);
  background-size:280px 240px;
}
.hero__orbit{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  pointer-events:none;
}
.hero .container{position:relative;z-index:2;}
.hero__grid{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:clamp(32px,5vw,72px);
  align-items:center;
}
.hero__badge{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:7px 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--on-dark-line);
  background:rgba(255,255,255,.05);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.05em;
  color:var(--on-dark-2);
  margin-bottom:24px;
}
.hero__badge i{
  width:6px;height:6px;border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 0 4px rgba(33,199,168,.16);
}
.hero h1{
  color:#fff;
  max-width:14ch;
}
.hero__sub{
  margin-top:22px;
  max-width:38ch;
  font-size:clamp(1rem,1.4vw,1.125rem);
  line-height:1.8;
  color:var(--on-dark-2);
}
.hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:34px;
}
.hero__stats{
  display:flex;
  flex-wrap:wrap;
  margin-top:38px;
  padding-top:24px;
  border-top:1px solid var(--on-dark-line);
}
.hero__stat{
  padding-right:26px;
  margin-right:26px;
  border-right:1px solid var(--on-dark-line);
}
.hero__stat:last-child{border-right:0;margin-right:0;padding-right:0;}
.hero__stat b{
  display:block;
  font-family:var(--font-num);
  font-size:clamp(1.15rem,1.8vw,1.5rem);
  font-weight:700;
  letter-spacing:-.01em;
  color:#fff;
  line-height:1.2;
}
.hero__stat span{
  display:block;
  margin-top:4px;
  font-size:12px;
  letter-spacing:.09em;
  color:var(--on-dark-3);
}
.hero__visual{position:relative;}
.device{
  position:relative;
  border-radius:34px;
  padding:10px;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.04);
  box-shadow:0 44px 90px -46px rgba(0,0,0,.9);
}
.device img{
  width:100%;
  aspect-ratio:4/5;
  object-fit:cover;
  border-radius:26px;
}
.device__glow{
  position:absolute;
  inset:auto -8% -12% -8%;
  height:56%;
  border-radius:50%;
  background:radial-gradient(closest-side,rgba(33,199,168,.28),transparent 72%);
  filter:blur(12px);
  pointer-events:none;
  z-index:-1;
}
.device__label{
  position:absolute;
  left:-14px;
  bottom:34px;
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:10px 15px;
  border-radius:var(--r-pill);
  background:#fff;
  color:var(--ink-900);
  font-size:12.5px;
  font-weight:700;
  box-shadow:var(--sh-1);
}
.device__label i{
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);
}

@media (max-width:1023px){
  .hero__grid{grid-template-columns:1fr;}
  .hero h1{max-width:20ch;}
  .hero__sub{max-width:52ch;}
  .hero__visual{max-width:420px;}
}
@media (max-width:767px){
  .hero__stat{
    padding-right:0;
    margin-right:0;
    border-right:0;
    width:50%;
    margin-bottom:18px;
  }
  .hero__actions .btn{width:100%;}
  .device__label{left:0;}
}

/* ===================== 功能价值区 ===================== */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
}
.feat-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.feat-card:hover{
  transform:translateY(-2px);
  border-color:rgba(33,199,168,.4);
  box-shadow:var(--sh-1);
}
.feat-card__media{
  overflow:hidden;
  background:#EDEBE5;
  flex:0 0 auto;
}
.feat-card__media img{
  width:100%;
  height:100%;
  object-fit:cover;
  aspect-ratio:16/10;
  transition:transform .45s var(--ease);
}
.feat-card:hover .feat-card__media img{transform:scale(1.03);}
.feat-card__body{padding:26px 26px 28px;}
.feat-card__body h3{margin:14px 0 10px;}
.feat-card__body p{font-size:15.5px;line-height:1.8;color:var(--ink-600);}

.feat-large{grid-column:1 / 8;grid-row:1 / 3;}
.feat-large .feat-card__media{flex:1 1 auto;min-height:260px;}
.feat-large .feat-card__media img{aspect-ratio:auto;height:100%;min-height:260px;}
.feat-large .feat-card__body h3{font-size:clamp(1.35rem,2vw,1.6rem);}
.feat-small-a{grid-column:8 / 13;grid-row:1;}
.feat-small-b{grid-column:8 / 13;grid-row:2;}
.feat-wide{
  grid-column:1 / 13;
  flex-direction:row;
  align-items:center;
  gap:0;
}
.feat-wide .feat-card__media{flex:0 0 300px;}
.feat-wide .feat-card__media img{aspect-ratio:1/1;height:100%;}
.feat-wide .feat-card__body{flex:1 1 auto;padding:30px 34px;}
.feat-wide .feat-card__body h3{margin-top:12px;}

.feat-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  margin-top:16px;
}
.feat-points li{
  position:relative;
  padding-left:16px;
  font-size:14px;
  color:var(--ink-600);
}
.feat-points li::before{
  content:"";
  position:absolute;
  left:0;top:.68em;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--primary);
}

@media (max-width:1023px){
  .feat-large,.feat-small-a,.feat-small-b,.feat-wide{grid-column:1 / 13;grid-row:auto;}
  .feat-wide{flex-direction:column;align-items:stretch;}
  .feat-wide .feat-card__media{flex:0 0 auto;}
  .feat-wide .feat-card__media img{aspect-ratio:16/10;}
  .feat-wide .feat-card__body{padding:26px;}
}

/* ===================== 截图轮播 ===================== */
.shots{position:relative;}
.shots__track{
  display:flex;
  gap:24px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:6px 2px 22px;
  scrollbar-width:none;
}
.shots__track::-webkit-scrollbar{display:none;}
.shot{
  flex:0 0 clamp(250px,25vw,318px);
  scroll-snap-align:start;
}
.shot__frame{
  border-radius:32px;
  padding:9px;
  border:1px solid var(--line);
  background:#fff;
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.shot__frame img{
  width:100%;
  aspect-ratio:9/16;
  object-fit:cover;
  border-radius:24px;
}
.shot figcaption{
  margin-top:14px;
  font-size:14px;
  color:var(--ink-600);
}
.shot figcaption b{
  display:block;
  font-size:15px;
  font-weight:700;
  color:var(--ink-900);
  margin-bottom:2px;
}
.shots__nav{
  position:absolute;
  top:38%;
  width:46px;height:46px;
  border-radius:50%;
  display:grid;place-items:center;
  background:#fff;
  border:1px solid var(--line-strong);
  box-shadow:var(--sh-1);
  color:var(--ink-900);
  z-index:3;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.shots__nav svg{width:16px;height:16px;}
.shots__nav:hover{background:var(--primary);border-color:var(--primary);color:#fff;}
.shots__nav--prev{left:-14px;}
.shots__nav--next{right:-14px;}
.shots__dots{
  display:flex;
  justify-content:center;
  gap:9px;
  margin-top:6px;
}
.shots__dot{
  width:8px;height:8px;
  border-radius:50%;
  background:rgba(15,17,21,.18);
  transition:background-color .2s var(--ease),width .2s var(--ease);
}
.shots__dot.is-active{background:var(--primary);width:24px;border-radius:99px;}

@media (max-width:1023px){
  .shots__nav--prev{left:0;}
  .shots__nav--next{right:0;}
}
@media (max-width:767px){
  .shots__track{gap:16px;}
  .shot{flex:0 0 76%;}
  .shots__nav{display:none;}
}

/* ===================== 系统要求 ===================== */
.spec-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 40px;
}
.spec-row{
  display:flex;
  align-items:center;
  gap:12px;
  padding:18px 4px;
  border-bottom:1px solid var(--line);
}
.spec-row__dot{
  width:7px;height:7px;
  border-radius:50%;
  background:var(--primary);
  flex:0 0 auto;
}
.spec-row__label{
  font-size:14.5px;
  color:var(--ink-600);
}
.spec-row__value{
  margin-left:auto;
  font-family:var(--font-num);
  font-size:14.5px;
  font-weight:600;
  color:var(--ink-900);
  text-align:right;
}
.spec-note{
  margin-top:22px;
  font-size:14px;
  color:var(--ink-400);
  max-width:720px;
}
@media (max-width:767px){
  .spec-grid{grid-template-columns:1fr;gap:0;}
  .spec-row{padding:15px 2px;}
  .spec-row__value{font-size:14px;}
}

/* ===================== 评价墙 ===================== */
.reviews{
  columns:3 260px;
  column-gap:24px;
}
.review{
  break-inside:avoid;
  margin-bottom:24px;
  padding:26px 24px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:#fff;
  box-shadow:0 1px 2px rgba(15,17,21,.03);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.review:hover{transform:translateY(-2px);border-color:rgba(33,199,168,.4);}
.review__stars{
  font-family:var(--font-num);
  font-size:13px;
  letter-spacing:.18em;
  color:var(--accent);
  margin-bottom:12px;
}
.review blockquote{
  font-size:15.5px;
  line-height:1.8;
  color:var(--ink-600);
}
.review figcaption{
  display:flex;
  align-items:center;
  gap:9px;
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.review__name{font-size:14px;font-weight:700;color:var(--ink-900);}
.review__role{
  font-size:12px;
  color:var(--ink-400);
  padding:2px 9px;
  border-radius:var(--r-pill);
  background:rgba(15,17,21,.04);
}
.review--dark{
  background:var(--ink);
  border-color:rgba(255,255,255,.1);
  color:var(--on-dark);
}
.review--dark blockquote{color:var(--on-dark-2);}
.review--dark .review__name{color:#fff;}
.review--dark .review__role{background:rgba(255,255,255,.08);color:var(--on-dark-2);}
.review--dark figcaption{border-top-color:var(--on-dark-line);}
.review--dark .review__stars{color:var(--primary-hi);}

@media (max-width:1023px){
  .reviews{columns:2 240px;}
}
@media (max-width:640px){
  .reviews{columns:1;}
}

/* ===================== 资讯列表 ===================== */
.news-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.news-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.news-card:hover{
  transform:translateY(-2px);
  border-color:rgba(33,199,168,.4);
  box-shadow:var(--sh-1);
}
.news-card__link{
  display:flex;
  flex-direction:column;
  height:100%;
  padding:24px 24px 22px;
}
.news-card__title{
  margin:14px 0 10px;
  font-size:17px;
  font-weight:700;
  line-height:1.5;
  color:var(--ink-900);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-card__excerpt{
  font-size:14.5px;
  line-height:1.78;
  color:var(--ink-600);
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-card__meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:auto;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-family:var(--font-num);
  font-size:12.5px;
  color:var(--ink-400);
}
.news-card__more{
  font-family:var(--font-cn);
  font-size:13px;
  font-weight:600;
  color:var(--primary-deep);
}

.empty-state{
  grid-column:1 / -1;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
  padding:56px 24px;
  border:1px dashed var(--line-strong);
  border-radius:var(--r-card);
  background:#fff;
  text-align:center;
}
.empty-state__mark{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--primary-soft);
  position:relative;
}
.empty-state__mark::after{
  content:"";
  position:absolute;
  inset:0;
  margin:auto;
  width:14px;height:14px;
  background:var(--primary);
  clip-path:polygon(50% 0,62% 38%,100% 50%,62% 62%,50% 100%,38% 62%,0 50%,38% 38%);
}
.empty-state p{font-size:15px;color:var(--ink-600);}

@media (max-width:1023px){
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:640px){
  .news-grid{grid-template-columns:1fr;}
}

/* 骨架屏 */
.skeleton-card{
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:#fff;
  padding:24px;
  overflow:hidden;
}
.skeleton-line{
  height:12px;
  border-radius:6px;
  background:linear-gradient(90deg,#EDEBE6 0%,#F6F5F1 50%,#EDEBE6 100%);
  background-size:220% 100%;
  animation:shimmer 1.2s linear infinite;
  margin-bottom:12px;
}
.skeleton-line.w60{width:60%;}
.skeleton-line.w90{width:90%;}
.skeleton-line.w80{width:80%;}
.skeleton-line.h20{height:20px;}
@keyframes shimmer{
  0%{background-position:120% 0;}
  100%{background-position:-20% 0;}
}

/* ===================== FAQ ===================== */
.faq-list{
  max-width:800px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:12px;
}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item:hover{border-color:rgba(33,199,168,.36);}
.faq-item[open]{
  border-color:rgba(33,199,168,.5);
  box-shadow:var(--sh-1);
}
.faq-item summary{
  display:flex;
  align-items:center;
  gap:16px;
  padding:20px 22px;
  cursor:pointer;
  list-style:none;
  font-size:16px;
  font-weight:700;
  color:var(--ink-900);
  line-height:1.55;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item__icon{
  margin-left:auto;
  flex:0 0 auto;
  width:26px;height:26px;
  border-radius:8px;
  background:var(--primary-soft);
  position:relative;
  transition:transform .24s var(--ease),background-color .24s var(--ease);
}
.faq-item__icon::before,
.faq-item__icon::after{
  content:"";
  position:absolute;
  inset:0;
  margin:auto;
  background:var(--primary-deep);
  border-radius:2px;
}
.faq-item__icon::before{width:12px;height:2px;}
.faq-item__icon::after{width:2px;height:12px;}
.faq-item[open] .faq-item__icon{transform:rotate(45deg);background:var(--primary);}
.faq-item[open] .faq-item__icon::before,
.faq-item[open] .faq-item__icon::after{background:#fff;}
.faq-item__body{
  padding:0 22px 22px;
  font-size:15.5px;
  line-height:1.85;
  color:var(--ink-600);
  max-width:680px;
}

/* ===================== 下载 CTA ===================== */
.download-cta{
  position:relative;
  background:var(--ink);
  color:var(--on-dark);
  border-radius:var(--r-block);
  padding:clamp(40px,6vw,72px) clamp(24px,4vw,60px);
  overflow:hidden;
  text-align:center;
}
.download-cta__stars{
  position:absolute;
  inset:0;
  opacity:.08;
  background-image:
    radial-gradient(1px 1px at 30px 40px,#fff 50%,transparent 51%),
    radial-gradient(1px 1px at 150px 110px,#fff 50%,transparent 51%),
    radial-gradient(1px 1px at 250px 30px,#fff 50%,transparent 51%);
  background-size:300px 220px;
}
.download-cta__inner{position:relative;z-index:2;}
.download-cta h2{color:#fff;}
.download-cta__sub{
  margin:18px auto 0;
  max-width:520px;
  font-size:15.5px;
  color:var(--on-dark-2);
}
.download-cta__actions{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:12px;
  margin-top:32px;
}
.download-cta__meta{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:10px 26px;
  margin-top:30px;
  padding-top:24px;
  border-top:1px solid var(--on-dark-line);
  font-family:var(--font-num);
  font-size:13px;
  color:var(--on-dark-3);
}
.qr-box{
  width:104px;height:104px;
  margin:0 auto 16px;
  border-radius:14px;
  border:1px solid var(--on-dark-line);
  background:
    linear-gradient(90deg,rgba(255,255,255,.14) 50%,transparent 50%) 0 0/12px 12px,
    linear-gradient(0deg,rgba(255,255,255,.14) 50%,transparent 50%) 0 0/12px 12px,
    rgba(255,255,255,.05);
  display:grid;
  place-items:center;
  font-size:12px;
  color:var(--on-dark-3);
  letter-spacing:.1em;
}
@media (max-width:767px){
  .download-cta__actions .btn{width:100%;}
}

/* ===================== 页脚 ===================== */
.site-footer{
  position:relative;
  background:var(--ink);
  color:var(--on-dark-2);
  padding:clamp(48px,6vw,80px) 0 28px;
  margin-top:clamp(48px,7vw,96px);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(33,199,168,.55),rgba(255,106,61,.35),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px 32px;
  padding-bottom:44px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand .brand__mark{background:rgba(255,255,255,.08);}
.footer-brand__text{
  font-size:18px;
  font-weight:800;
  color:#fff;
  letter-spacing:-.02em;
}
.footer-brand__text em{font-family:var(--font-num);font-style:normal;font-weight:500;}
.footer-desc{font-size:14.5px;line-height:1.8;color:var(--on-dark-2);max-width:320px;}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{
  display:inline-block;
  font-size:14.5px;
  color:var(--on-dark-2);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-links a:hover{color:var(--primary-hi);transform:translateX(2px);}
.footer-contact{font-size:14.5px;line-height:1.9;}
.footer-contact b{color:#fff;font-weight:600;}

.sub-form{margin-top:18px;max-width:320px;}
.sub-form__label{
  display:block;
  font-size:13px;
  color:var(--on-dark-2);
  margin-bottom:10px;
}
.sub-form__row{display:flex;gap:8px;}
.sub-form input{
  flex:1 1 auto;
  min-width:0;
  height:44px;
  padding:0 14px;
  border-radius:10px;
  border:1px solid var(--on-dark-line);
  background:rgba(255,255,255,.05);
  color:#fff;
  font-size:14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.sub-form input::placeholder{color:var(--on-dark-3);}
.sub-form input:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(33,199,168,.22);
}
.sub-form.is-error input{border-color:var(--warn);box-shadow:0 0 0 3px rgba(229,72,77,.2);}
.sub-form__msg{
  min-height:20px;
  margin-top:9px;
  font-size:13px;
  color:var(--on-dark-3);
}
.sub-form.is-error .sub-form__msg{color:#FF8A8D;}
.sub-form.is-ok .sub-form__msg{
  color:var(--primary-hi);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-top:24px;
  border-top:1px solid var(--on-dark-line);
  font-size:13px;
  color:var(--on-dark-3);
}
.footer-bottom a{color:var(--on-dark-2);}
.footer-bottom a:hover{color:var(--primary-hi);}

@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:32px;}
}

/* ===================== 滚动淡入 ===================== */
.reveal{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
  will-change:opacity,transform;
}
.reveal.is-visible{opacity:1;transform:translateY(0);}

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

/* ===================== 通用辅助 ===================== */
.sr-only{
  position:absolute;width:1px;height:1px;
  padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0;
}
.num{font-family:var(--font-num);}

/* roulang page: category1 */
:root{
  --primary:#21C7A8;
  --primary-600:#17B196;
  --primary-soft:#E9FAF6;
  --accent:#FF6A3D;
  --ink:#12141C;
  --base:#F6F5F1;
  --ink-900:#0F1115;
  --ink-600:#4A4F5A;
  --ink-400:#8A9099;
  --line:rgba(15,17,21,.08);
  --on-ink:#F2F3F5;
  --on-ink-soft:rgba(242,243,245,.66);
  --on-ink-line:rgba(255,255,255,.10);
  --r-card:18px;
  --r-btn:10px;
  --r-block:28px;
  --r-img:14px;
  --shadow-sm:0 1px 2px rgba(15,17,21,.04);
  --shadow:0 1px 2px rgba(15,17,21,.04),0 10px 28px -14px rgba(15,17,21,.14);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1240px;
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",Inter,sans-serif;
  --font-num:"Space Grotesk","Inter","HarmonyOS Sans SC","PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--base);
  color:var(--ink-600);
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:800;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:clamp(56px,9vw,110px) 0}
.section--tight{padding:clamp(40px,6vw,72px) 0}
.eyebrow{
  font-family:var(--font-num);
  font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--primary-600);font-weight:600;margin-bottom:12px;display:block;
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:clamp(28px,4vw,48px)}
.section-head h2{font-size:clamp(1.6rem,3vw,2.5rem);line-height:1.2}
.section-head p{max-width:640px;margin-top:10px;color:var(--ink-600)}
.lead{max-width:640px}
.mono{font-family:var(--font-num)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;padding:12px 0 0;transition:padding .22s var(--ease)}
.site-header.is-scrolled{padding-top:8px}
.nav-card{
  display:flex;align-items:center;gap:18px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:var(--shadow-sm);
  padding:10px 14px;
  transition:box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.site-header.is-scrolled .nav-card{box-shadow:var(--shadow)}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;padding:4px 6px}
.brand__mark{width:30px;height:30px;display:grid;place-items:center;flex-shrink:0}
.brand__mark svg{width:26px;height:26px}
.brand__text{font-weight:800;font-size:18px;color:var(--ink-900);letter-spacing:-.01em}
.brand__text em{font-family:var(--font-num);font-style:normal;font-weight:500;text-transform:lowercase;color:var(--primary-600);margin-left:2px}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:wrap}
.nav-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;border-radius:var(--r-btn);
  font-size:14px;color:var(--ink-600);font-weight:600;
  border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-link svg{width:20px;height:20px;color:var(--ink-400);transition:color .2s var(--ease)}
.nav-link:hover{background:var(--primary-soft);color:var(--ink-900)}
.nav-link:hover svg{color:var(--primary-600)}
.nav-link.is-active{
  color:var(--ink-900);border-color:rgba(33,199,168,.45);
  box-shadow:inset 0 -2px 0 var(--primary);
}
.nav-link.is-active svg{color:var(--primary-600)}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:#fff;color:var(--ink-900);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle svg{width:22px;height:22px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;cursor:pointer;border:1px solid transparent;
  transition:transform .18s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn svg{width:18px;height:18px}
.btn--primary{background:var(--primary);color:#fff;box-shadow:0 1px 2px rgba(15,17,21,.04)}
.btn--primary:hover{background:#2AD2B4;box-shadow:0 10px 24px -10px rgba(33,199,168,.85);transform:translateY(-1px)}
.btn--primary:active{transform:translateY(0);box-shadow:0 1px 2px rgba(15,17,21,.06)}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--ink-900)}
.btn--ghost:hover{border-color:rgba(33,199,168,.45);color:var(--ink-900);box-shadow:var(--shadow-sm)}
.btn--light{background:#fff;color:var(--ink-900)}
.btn--light:hover{background:#EAF7F4;transform:translateY(-1px)}
.btn--pill{border-radius:999px}
.btn--block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;margin-top:18px;border-radius:var(--r-block);overflow:hidden;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  isolation:isolate;
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(circle at 82% 24%,rgba(33,199,168,.20),transparent 46%),
    linear-gradient(180deg,rgba(18,20,28,.80),rgba(18,20,28,.92));
}
.page-hero .container{padding-top:clamp(40px,6vw,72px);padding-bottom:clamp(40px,6vw,72px)}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--on-ink-soft);margin-bottom:22px;flex-wrap:wrap}
.crumbs a{color:var(--on-ink-soft)}
.crumbs a:hover{color:var(--primary)}
.crumbs span.sep{opacity:.5}
.page-hero h1{
  color:#fff;font-size:clamp(2.25rem,5.2vw,3.6rem);line-height:1.08;
  letter-spacing:-.02em;max-width:16em;
}
.page-hero .hero-lead{color:var(--on-ink-soft);max-width:640px;margin-top:18px;font-size:17px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 15px;border-radius:var(--r-btn);
  border:1px solid var(--on-ink-line);background:rgba(255,255,255,.06);
  color:var(--on-ink);font-size:13px;font-weight:600;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.chip:hover{background:rgba(33,199,168,.18);border-color:rgba(33,199,168,.55)}
.chip.is-active{background:var(--primary);border-color:var(--primary);color:#fff}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--primary)}
.chip.is-active .dot{background:#fff}

/* ---------- layout ---------- */
.cat-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:40px;align-items:start}
.toc-card{
  position:sticky;top:96px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--shadow-sm);
}
.toc-card h2{
  font-size:13px;letter-spacing:.08em;text-transform:uppercase;
  font-family:var(--font-num);color:var(--ink-400);font-weight:600;margin-bottom:14px;
}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:10px 12px;border-radius:10px;font-size:14px;font-weight:600;
  color:var(--ink-600);border-left:3px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.toc-list a:hover{background:var(--primary-soft);color:var(--ink-900)}
.toc-list a.is-current{color:var(--ink-900);background:var(--primary-soft);border-left-color:var(--primary)}
.toc-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-400);line-height:1.7}
.toc-cta{margin-top:16px}

.content-col{display:flex;flex-direction:column;gap:32px;min-width:0}
.block-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:clamp(22px,3vw,34px);box-shadow:var(--shadow-sm);
  scroll-margin-top:110px;
}
.block-card h2{font-size:clamp(1.35rem,2.2vw,1.85rem);line-height:1.25;margin-bottom:14px}
.block-card > p{max-width:720px}
.split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:28px;align-items:center;margin-top:22px}
.split--reverse .split__media{order:2}
.split__media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--line)}
.split__body p{max-width:640px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:700;letter-spacing:.04em;
  padding:5px 11px;border-radius:999px;background:var(--primary-soft);color:var(--primary-600);
  margin-bottom:14px;
}
.tag--accent{background:rgba(255,106,61,.12);color:#D9502A}

.num-list{display:flex;flex-direction:column;gap:16px;margin-top:22px;counter-reset:steps}
.num-list li{
  display:grid;grid-template-columns:36px minmax(0,1fr);gap:14px;align-items:start;
  counter-increment:steps;
}
.num-list li::before{
  content:counter(steps,decimal-leading-zero);
  font-family:var(--font-num);font-weight:700;font-size:15px;color:var(--primary-600);
  background:var(--primary-soft);border-radius:10px;height:36px;display:grid;place-items:center;
}
.num-list strong{display:block;color:var(--ink-900);font-size:16px;margin-bottom:2px}
.num-list span{font-size:15px;color:var(--ink-600)}

.data-strip{
  background:var(--ink);color:var(--on-ink);border-radius:var(--r-card);
  padding:clamp(22px,3vw,32px);border:1px solid var(--on-ink-line);
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;
}
.data-strip .item{border-left:1px solid var(--on-ink-line);padding-left:18px}
.data-strip .item:first-child{border-left:0;padding-left:0}
.data-strip .k{font-family:var(--font-num);font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:700;color:#fff;line-height:1.1}
.data-strip .k small{font-size:14px;font-weight:500;color:var(--on-ink-soft);margin-left:4px}
.data-strip .v{font-size:13px;color:var(--on-ink-soft);margin-top:6px}

.spec-card{margin-top:22px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.spec-row{
  display:grid;grid-template-columns:minmax(120px,190px) minmax(0,1fr) auto;
  gap:16px;align-items:center;padding:15px 20px;border-top:1px solid var(--line);
}
.spec-row:first-child{border-top:0}
.spec-row .label{display:flex;align-items:center;gap:9px;color:var(--ink-900);font-weight:600;font-size:15px}
.spec-row .label i{width:7px;height:7px;border-radius:50%;background:var(--primary);flex-shrink:0}
.spec-row .value{font-size:14px;color:var(--ink-600)}
.spec-row .mark{font-family:var(--font-num);font-size:13px;color:var(--ink-400)}
.spec-foot{padding:14px 20px;border-top:1px solid var(--line);background:var(--base);font-size:13px;color:var(--ink-400)}

.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:24px}
.scene{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.scene:hover{transform:translateY(-2px);border-color:rgba(33,199,168,.4);box-shadow:var(--shadow)}
.scene h3{font-size:1.05rem;margin-bottom:8px}
.scene p{font-size:15px}

.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:26px}
.link-card{
  display:flex;gap:18px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:18px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.link-card:hover{transform:translateY(-2px);border-color:rgba(33,199,168,.4);box-shadow:var(--shadow)}
.link-card img{width:112px;height:84px;object-fit:cover;flex-shrink:0;border-radius:12px}
.link-card h3{font-size:1.05rem;margin-bottom:6px}
.link-card p{font-size:14px;color:var(--ink-600)}
.link-card .go{font-size:13px;font-weight:700;color:var(--primary-600);margin-top:8px;display:inline-flex;align-items:center;gap:6px}
.link-card:hover .go{gap:10px}

/* ---------- FAQ ---------- */
.faq{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:700;color:var(--ink-900);
}
.faq-q .sign{
  width:26px;height:26px;flex-shrink:0;position:relative;color:var(--primary-600);
  transition:transform .22s var(--ease);
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq-q .sign::before{left:50%;top:5px;bottom:5px;width:2px;transform:translateX(-50%)}
.faq-q .sign::after{top:50%;left:5px;right:5px;height:2px;transform:translateY(-50%)}
.faq-item.is-open .sign{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.faq-a p{padding:0 22px 20px;color:var(--ink-600);max-width:720px}

/* ---------- CTA dark ---------- */
.cta-dark{
  background:var(--ink);color:var(--on-ink);border-radius:var(--r-block);
  padding:clamp(40px,6vw,72px) clamp(24px,4vw,56px);
  position:relative;overflow:hidden;border:1px solid var(--on-ink-line);
  text-align:center;
}
.cta-dark::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.08) 1px,transparent 1px);
  background-size:22px 22px;opacity:.6;pointer-events:none;
}
.cta-dark > *{position:relative}
.cta-dark h2{color:#fff;font-size:clamp(1.6rem,3vw,2.4rem);margin-bottom:14px}
.cta-dark p{color:var(--on-ink-soft);max-width:640px;margin:0 auto}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px}
.cta-meta{
  display:flex;flex-wrap:wrap;gap:26px;justify-content:center;margin-top:26px;
  padding-top:22px;border-top:1px solid var(--on-ink-line);
  font-size:13px;color:var(--on-ink-soft);
}
.cta-meta b{font-family:var(--font-num);color:#fff;font-weight:600}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;inset:0;z-index:80;background:rgba(18,20,28,.94);
  padding:80px 24px 120px;overflow-y:auto;
}
.drawer[hidden]{display:none}
.drawer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;max-width:560px;margin:0 auto}
.drawer-card{
  display:flex;flex-direction:column;gap:8px;
  background:rgba(255,255,255,.06);border:1px solid var(--on-ink-line);
  border-radius:14px;padding:16px;color:var(--on-ink);font-weight:600;font-size:14px;
}
.drawer-card svg{width:20px;height:20px;color:var(--primary)}
.drawer-card.is-active{border-color:var(--primary);background:rgba(33,199,168,.16)}
.drawer-close{
  position:absolute;top:20px;right:24px;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--on-ink-line);background:transparent;color:#fff;cursor:pointer;
  display:grid;place-items:center;
}
.drawer-close svg{width:20px;height:20px}
.drawer-cta{position:fixed;left:0;right:0;bottom:0;padding:16px 24px;background:rgba(18,20,28,.98);border-top:1px solid var(--on-ink-line)}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink);color:var(--on-ink-soft);margin-top:clamp(56px,8vw,110px);
  border-top:1px solid var(--on-ink-line);
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:26px 26px;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.4fr;gap:36px;
  padding:clamp(44px,6vw,72px) 0 32px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand__text{color:#fff;font-weight:800;font-size:18px}
.footer-brand__text em{font-family:var(--font-num);font-style:normal;font-weight:500;text-transform:lowercase;color:var(--primary);margin-left:2px}
.footer-desc{font-size:14px;line-height:1.8;max-width:320px}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:16px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block}
.footer-links a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact{font-size:14px;margin-bottom:14px}
.sub-form{max-width:340px}
.sub-form__label{display:block;font-size:13px;color:var(--on-ink-soft);margin-bottom:10px}
.sub-form__row{display:flex;gap:10px}
.sub-form input{
  flex:1;min-width:0;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--on-ink-line);background:rgba(255,255,255,.06);
  color:#fff;padding:0 14px;font-size:14px;font-family:inherit;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.sub-form input::placeholder{color:rgba(242,243,245,.45)}
.sub-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(33,199,168,.28)}
.sub-form input.is-error{border-color:#E5484D;box-shadow:0 0 0 2px rgba(229,72,77,.22)}
.sub-form__msg{font-size:13px;margin-top:10px;min-height:20px}
.sub-form__msg.ok{color:var(--primary)}
.sub-form__msg.err{color:#FF9B9B}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  padding:20px 0 28px;border-top:1px solid var(--on-ink-line);font-size:13px;
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .cat-layout{grid-template-columns:250px minmax(0,1fr);gap:30px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .cat-layout{grid-template-columns:minmax(0,1fr)}
  .toc-card{position:static;top:auto}
  .toc-list{flex-direction:row;flex-wrap:wrap;gap:8px}
  .toc-list a{border-left:0;border:1px solid var(--line);border-radius:999px;padding:8px 14px}
  .toc-list a.is-current{border-color:var(--primary);background:var(--primary-soft)}
  .toc-note,.toc-cta{display:none}
  .data-strip{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .data-strip .item:nth-child(3){border-left:0;padding-left:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .split{grid-template-columns:minmax(0,1fr);gap:20px}
  .split--reverse .split__media{order:0}
  .scene-grid{grid-template-columns:minmax(0,1fr)}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .section{padding:clamp(52px,10vw,72px) 0}
  .page-hero{border-radius:22px}
  .link-card img{width:92px;height:70px}
}
@media (max-width:575px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .data-strip{grid-template-columns:minmax(0,1fr)}
  .data-strip .item{border-left:0;padding-left:0;border-top:1px solid var(--on-ink-line);padding-top:16px}
  .data-strip .item:first-child{border-top:0;padding-top:0}
  .spec-row{grid-template-columns:minmax(0,1fr);gap:6px}
  .spec-row .mark{color:var(--ink-400)}
  .sub-form__row{flex-direction:column}
  .sub-form__row .btn{width:100%}
  .link-card{flex-direction:column;align-items:flex-start}
  .link-card img{width:100%;height:150px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --primary:#21C7A8;
  --primary-ink:#128f7a;
  --primary-soft:#E9FAF6;
  --accent:#FF6A3D;
  --ink:#12141C;
  --base:#F6F5F1;
  --ink-900:#0F1115;
  --ink-600:#4A4F5A;
  --ink-400:#8A9099;
  --line:rgba(15,17,21,.08);
  --line-strong:rgba(15,17,21,.14);
  --danger:#E5484D;
  --r-card:18px;
  --r-btn:10px;
  --r-block:28px;
  --r-img:14px;
  --shadow:0 1px 2px rgba(15,17,21,.04),0 10px 28px -14px rgba(15,17,21,.14);
  --shadow-lg:0 18px 44px -24px rgba(15,17,21,.4);
  --ease:cubic-bezier(.22,.61,.36,1);
  --maxw:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--base);
  color:var(--ink-600);
  font-family:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden}
img{max-width:100%;height:auto;display:block;border-style:none}
svg{display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0}
strong{color:var(--ink-900)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(33,199,168,.28)}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
@media (min-width:768px){.container{padding:0 32px}}
@media (min-width:1280px){.container{padding:0 40px}}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;padding:12px 0}
.nav-panel{
  display:flex;align-items:center;gap:14px;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line);
  border-radius:16px;
  padding:10px 14px;
  box-shadow:0 1px 2px rgba(15,17,21,.04);
  transition:box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.site-header.is-stuck .nav-panel{box-shadow:0 14px 30px -20px rgba(15,17,21,.55);border-color:rgba(15,17,21,.12)}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:1.05rem;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap}
.brand__mark{width:32px;height:32px;border-radius:10px;background:var(--ink);display:grid;place-items:center;flex:0 0 auto}
.brand__mark svg{width:20px;height:20px}
.brand__text em{font-family:"Space Grotesk",Inter,system-ui,sans-serif;font-style:normal;font-weight:500;color:var(--primary);margin-left:1px}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;border-radius:10px;
  font-size:.875rem;color:var(--ink-600);white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-link svg{width:20px;height:20px;color:var(--primary);flex:0 0 auto}
.nav-link:hover{background:var(--primary-soft);color:var(--ink-900)}
.nav-link.is-active{background:#F0FBF8;color:var(--ink-900);font-weight:600;box-shadow:inset 0 0 0 1px rgba(33,199,168,.45)}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-links + .nav-actions{margin-left:8px}
.nav-toggle{
  display:none;width:44px;height:44px;flex:0 0 auto;border-radius:10px;
  border:1px solid var(--line);background:#fff;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(33,199,168,.5);background:var(--primary-soft)}
.nav-toggle__bar{width:18px;height:2px;border-radius:2px;background:var(--ink-900);transition:transform .24s var(--ease),opacity .24s var(--ease)}
body.nav-open .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
body.nav-open .nav-toggle__bar:nth-child(2){opacity:0}
body.nav-open .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.mobile-nav{position:fixed;inset:0;z-index:50;display:none;padding:96px 20px 40px;overflow-y:auto;background:rgba(18,20,28,.98)}
.mobile-nav.is-open{display:block}
.mobile-nav__title{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:rgba(242,243,245,.55);font-family:"Space Grotesk",Inter,sans-serif;margin-bottom:14px}
.mobile-nav__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.mobile-nav__item{
  display:flex;flex-direction:column;gap:10px;padding:16px;border-radius:14px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  color:#F2F3F5;font-size:.9rem;font-weight:600;
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.mobile-nav__item svg{width:22px;height:22px;color:var(--primary)}
.mobile-nav__item:hover{background:rgba(33,199,168,.14);border-color:rgba(33,199,168,.5);transform:translateY(-2px)}
.mobile-nav__cta{margin-top:20px;display:block}
.mobile-nav__cta .btn{width:100%}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:.9rem;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease),filter .2s var(--ease);
}
.btn svg{width:18px;height:18px;flex:0 0 auto}
.btn--primary{background:var(--primary);color:#fff;box-shadow:0 1px 2px rgba(15,17,21,.06)}
.btn--primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 10px 24px -10px rgba(33,199,168,.85)}
.btn--primary:active{transform:translateY(0);box-shadow:none;filter:brightness(.98)}
.btn--ghost{background:#fff;border-color:var(--line-strong);color:var(--ink-900)}
.btn--ghost:hover{border-color:rgba(33,199,168,.55);color:var(--primary-ink);background:var(--primary-soft)}
.btn--light{background:#F2F3F5;color:var(--ink);border-color:transparent}
.btn--light:hover{background:#fff;transform:translateY(-1px);box-shadow:0 10px 24px -14px rgba(242,243,245,.5)}
.btn--pill{border-radius:999px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

.chip-card{
  display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 16px;
  border-radius:10px;border:1px solid var(--line);background:#fff;
  font-size:.85rem;font-weight:600;color:var(--ink-900);
  transition:border-color .2s var(--ease),background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.chip-card svg{width:16px;height:16px;color:var(--primary)}
.chip-card:hover{border-color:rgba(33,199,168,.5);background:var(--primary-soft);color:var(--primary-ink);transform:translateY(-2px)}

/* ---------- 文章头部 ---------- */
.article-hero{position:relative;background:var(--ink);color:#F2F3F5;padding:clamp(42px,6vw,78px) 0 clamp(38px,5.4vw,66px);overflow:hidden}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(18,20,28,.74),rgba(18,20,28,.9)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.07;
  background-image:radial-gradient(rgba(255,255,255,.85) 1px,transparent 1px);
  background-size:46px 46px;
}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.8rem;color:rgba(242,243,245,.66)}
.breadcrumb a{transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:#F2F3F5}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-top:24px;
  font-family:"Space Grotesk",Inter,system-ui,sans-serif;
  font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--primary);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);opacity:.7}
.article-title{
  margin:14px 0 20px;max-width:22ch;
  color:#F2F3F5;font-size:clamp(1.85rem,4vw,3rem);font-weight:800;
  letter-spacing:-.02em;line-height:1.2;
}
.article-meta{list-style:none;display:flex;flex-wrap:wrap;gap:10px 22px;font-size:.85rem;color:rgba(242,243,245,.66)}
.article-meta li{display:inline-flex;align-items:center;gap:6px}
.article-meta time,.article-meta .hl{color:var(--primary)}
.article-meta .hl--accent{color:var(--accent)}

/* ---------- 板块 ---------- */
.section{padding:clamp(56px,8vw,110px) 0}
.section--tight{padding-top:clamp(40px,5vw,72px)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:clamp(24px,3vw,36px)}
.section-head h2{margin:0;color:var(--ink-900);font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:800;letter-spacing:-.01em;line-height:1.25}
.section-head p{margin:8px 0 0;max-width:640px;font-size:.95rem;color:var(--ink-600)}

/* ---------- 正文 ---------- */
.article-wrap{max-width:760px;margin:0 auto}
.article-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-block);
  padding:clamp(22px,4vw,44px);box-shadow:var(--shadow);
}
.article-body{font-size:17px;line-height:1.85;color:var(--ink-600)}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em;max-width:100%}
.article-body h2{
  position:relative;margin:2.1em 0 .8em;padding-left:14px;
  font-size:clamp(1.3rem,2.4vw,1.7rem);font-weight:800;line-height:1.4;color:var(--ink-900);letter-spacing:-.01em;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:2px;background:var(--primary)}
.article-body h3{margin:1.6em 0 .6em;font-size:1.15rem;font-weight:700;line-height:1.45;color:var(--ink-900)}
.article-body h4{margin:1.4em 0 .5em;font-size:1rem;font-weight:700;color:var(--ink-900)}
.article-body a{color:var(--primary-ink);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body a:hover{color:var(--accent)}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.35em}
.article-body li{margin:.42em 0}
.article-body ul li::marker{color:var(--primary)}
.article-body ol li::marker{color:var(--primary);font-weight:700}
.article-body blockquote{
  margin:1.5em 0;padding:16px 20px;border-left:3px solid var(--primary);
  background:#EFFAF7;border-radius:0 var(--r-img) var(--r-img) 0;color:var(--ink-900);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:1.5em auto;box-shadow:var(--shadow)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{margin-top:8px;text-align:center;font-size:.82rem;color:var(--ink-400)}
.article-body hr{margin:2em 0;border:0;border-top:1px solid var(--line)}
.article-body code{background:#F1F3F2;border-radius:6px;padding:1px 6px;font-size:.9em;color:var(--ink-900)}
.article-body table{width:100%;margin:1.6em 0;border-collapse:collapse;font-size:.92rem;overflow:hidden;border:1px solid var(--line);border-radius:12px}
.article-body th,.article-body td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.article-body thead th{background:#F3F7F6;color:var(--ink-900);font-weight:700}
.article-body tbody tr:nth-child(even){background:#FAFAF8}
.article-body tbody tr:last-child td{border-bottom:0}

.article-foot{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:28px}

.empty-state{
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px;
  padding:clamp(28px,5vw,56px) clamp(18px,4vw,40px);
}
.empty-state__icon{width:64px;height:64px;border-radius:18px;background:var(--primary-soft);display:grid;place-items:center}
.empty-state__icon svg{width:30px;height:30px;color:var(--primary)}
.empty-state__title{font-size:1.25rem;font-weight:800;color:var(--ink-900)}
.empty-state__text{max-width:46ch;font-size:.95rem;color:var(--ink-600);margin:0}

/* ---------- 卡片 ---------- */
.grid-3{display:grid;gap:24px;grid-template-columns:minmax(0,1fr)}
@media (min-width:768px){.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(33,199,168,.4);box-shadow:var(--shadow)}
.card__media{display:block;aspect-ratio:16/10;overflow:hidden;background:#EDEDE8}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .42s var(--ease)}
.card:hover .card__media img{transform:scale(1.03)}
.card__body{display:flex;flex-direction:column;gap:10px;flex:1;padding:18px 20px 20px}
.card__title{font-size:1.05rem;font-weight:700;line-height:1.45;color:var(--ink-900)}
.card__title a{transition:color .2s var(--ease)}
.card__title a:hover{color:var(--primary-ink)}
.card__desc{margin:0;font-size:.9rem;line-height:1.75;color:var(--ink-600)}
.card__meta{margin-top:auto;display:flex;flex-wrap:wrap;gap:6px 14px;font-size:.78rem;color:var(--ink-400)}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:var(--primary-soft);color:var(--primary-ink);font-size:.72rem;font-weight:600;letter-spacing:.02em}
.tag--accent{background:rgba(255,106,61,.12);color:#C2401A}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:800px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.faq-item:hover{border-color:rgba(33,199,168,.36)}
.faq-item[open]{box-shadow:var(--shadow)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;cursor:pointer;list-style:none;
  font-size:1rem;font-weight:700;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:1.35rem;line-height:1;color:var(--primary);transition:transform .24s var(--ease)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-answer{padding:0 20px 20px;color:var(--ink-600);font-size:.95rem}
.faq-item .faq-answer p{margin:0}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;text-align:center;
  background:var(--ink);color:#F2F3F5;border-radius:var(--r-block);
  padding:clamp(32px,6vw,64px) clamp(20px,4vw,56px);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.07;
  background-image:radial-gradient(rgba(255,255,255,.85) 1px,transparent 1px);
  background-size:42px 42px;
}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{margin:0 0 14px;font-size:clamp(1.5rem,3vw,2.3rem);font-weight:800;letter-spacing:-.01em;color:#F2F3F5}
.cta-band p{margin:0 auto;max-width:56ch;font-size:.98rem;color:rgba(242,243,245,.66)}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:26px}
.cta-band__meta{margin-top:20px;font-size:.78rem;color:rgba(242,243,245,.55);font-family:"Space Grotesk",Inter,system-ui,sans-serif;letter-spacing:.02em}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;margin-top:clamp(56px,8vw,110px);padding:clamp(48px,7vw,80px) 0 28px;background:var(--ink);color:rgba(242,243,245,.66)}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(33,199,168,.6),transparent)}
.footer-grid{display:grid;gap:36px;grid-template-columns:minmax(0,1fr)}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.4fr}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:1.05rem;font-weight:800;color:#F2F3F5}
.footer-brand__text em{font-family:"Space Grotesk",Inter,system-ui,sans-serif;font-style:normal;font-weight:500;color:var(--primary);margin-left:1px}
.footer-desc{margin:14px 0 0;max-width:34ch;font-size:.9rem;line-height:1.8}
.footer-col h4{margin:0 0 14px;font-size:.95rem;color:#F2F3F5}
.footer-links{display:grid;gap:10px}
.footer-links a{display:inline-block;font-size:.9rem;transition:color .2s var(--ease),transform .2s var(--ease)}
.footer-links a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact{margin:0 0 14px;font-size:.88rem;line-height:1.8}
.sub-form__label{display:block;margin-bottom:8px;font-size:.8rem;color:rgba(242,243,245,.66)}
.sub-form__row{display:flex;flex-wrap:wrap;gap:8px}
.sub-form input{
  flex:1 1 160px;min-width:0;height:44px;padding:0 14px;border-radius:10px;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);color:#F2F3F5;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.sub-form input::placeholder{color:rgba(242,243,245,.45)}
.sub-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(33,199,168,.22)}
.sub-form input.is-error{border-color:var(--danger);box-shadow:0 0 0 3px rgba(229,72,77,.18)}
.sub-form__msg{min-height:1.2em;margin:8px 0 0;font-size:.8rem}
.sub-form__msg.is-error{color:#FF8A8E}
.sub-form__msg.is-ok{color:var(--primary)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  font-size:.8rem;color:rgba(242,243,245,.55);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
}

/* ---------- 断点 ---------- */
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .nav-actions{margin-left:auto}
}
@media (max-width:767px){
  body{font-size:16px}
  .section{padding:56px 0}
  .article-hero{padding:36px 0 44px}
  .article-title{max-width:none}
  .article-card{border-radius:22px;padding:22px 18px}
  .article-body{font-size:16px;line-height:1.8}
  .card__body{padding:16px 16px 18px}
  .cta-band{border-radius:22px}
  .cta-band__actions .btn{width:100%}
  .faq-item summary{padding:16px}
  .faq-item .faq-answer{padding:0 16px 18px}
}
@media (max-width:575px){
  .container{padding:0 18px}
  .article-meta{gap:8px 14px;font-size:.8rem}
  .article-foot{flex-direction:column;align-items:stretch}
  .article-foot .btn{width:100%}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --primary:#21C7A8;
  --primary-strong:#17B197;
  --primary-soft:#E9FAF6;
  --accent:#FF6A3D;
  --ink:#12141C;
  --base:#F6F5F1;
  --paper:#FFFFFF;
  --ink-900:#0F1115;
  --ink-600:#4A4F5A;
  --ink-400:#8A9099;
  --line:rgba(15,17,21,.08);
  --line-mid:rgba(15,17,21,.14);
  --on-ink:#F2F3F5;
  --on-ink-2:rgba(242,243,245,.66);
  --on-ink-line:rgba(255,255,255,.10);
  --danger:#E5484D;
  --r-card:18px;
  --r-btn:10px;
  --r-block:28px;
  --r-img:14px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(15,17,21,.04), 0 10px 28px -14px rgba(15,17,21,.14);
  --sh-2:0 1px 2px rgba(15,17,21,.05), 0 20px 44px -22px rgba(15,17,21,.22);
  --sh-primary:0 10px 24px -10px rgba(33,199,168,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:200ms var(--ease);
  --font-cn:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Space Grotesk","Inter","Helvetica Neue",Arial,var(--font-cn);
  --container:1240px;
  --pad-x:24px;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.85;
  color:var(--ink-600);
  background-color:var(--base);
  background-image:radial-gradient(rgba(15,17,21,.055) 1px,transparent 1px);
  background-size:26px 26px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t),transform var(--t)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
strong,b{color:var(--ink-900);font-weight:700}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(33,199,168,.28)}

/* ============ 排版 ============ */
h1,h2,h3,h4{color:var(--ink-900);font-weight:800;letter-spacing:-.02em}
h1{font-size:clamp(2.25rem,5.2vw,4.25rem);line-height:1.08}
h2{font-size:clamp(1.6rem,3vw,2.5rem);line-height:1.18;font-weight:800}
h3{font-size:1.25rem;line-height:1.4;font-weight:700}
p{max-width:740px}
.lead{font-size:18px;line-height:1.8;max-width:640px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-num);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--primary-strong);font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:16px;height:1px;background:var(--primary)}

/* ============ 容器与板块 ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--pad-x)}
.section{padding:clamp(64px,9vw,140px) 0}
.section--tight{padding:clamp(48px,6vw,90px) 0}
.section--dark{
  background:var(--ink);color:var(--on-ink);
  padding:clamp(80px,10vw,160px) 0;border-radius:var(--r-block);
  margin:0 12px;position:relative;overflow:hidden;
}
.section--dark h2,.section--dark h3{color:var(--on-ink)}
.section--dark p{color:var(--on-ink-2)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}
.section-head p{margin-top:12px}
.link-more{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--paper);font-size:14px;font-weight:600;color:var(--ink-900);box-shadow:var(--sh-1);
}
.link-more:hover{border-color:rgba(33,199,168,.45);color:var(--primary-strong);transform:translateY(-2px)}
.link-more svg{width:16px;height:16px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.2;letter-spacing:0;
  border:1px solid transparent;transition:all var(--t);white-space:nowrap;
}
.btn svg{width:18px;height:18px;flex:none}
.btn--primary{background:var(--primary);color:#04231D;box-shadow:0 1px 2px rgba(15,17,21,.06)}
.btn--primary:hover{background:#2BD4B4;box-shadow:var(--sh-primary);transform:translateY(-1px)}
.btn--primary:active{transform:translateY(0);box-shadow:none}
.btn--ghost{background:transparent;border-color:var(--line-mid);color:var(--ink-900)}
.btn--ghost:hover{border-color:rgba(33,199,168,.55);color:var(--primary-strong);transform:translateY(-1px)}
.btn--ghost:active{transform:translateY(0)}
.btn--light{background:#FFFFFF;color:var(--ink-900)}
.btn--light:hover{background:#EFFBF8;transform:translateY(-1px)}
.btn--outline-light{background:transparent;border-color:var(--on-ink-line);color:var(--on-ink)}
.btn--outline-light:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}
.btn--pill{border-radius:var(--r-pill)}
.btn--block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn.is-loading{pointer-events:none;opacity:.75}
.btn.is-loading svg{animation:spin 900ms linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.text-link{color:var(--ink-900);font-weight:600;position:relative;display:inline-block}
.text-link::after{content:"";position:absolute;left:0;bottom:-3px;height:2px;width:100%;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform 200ms var(--ease)}
.text-link:hover{color:var(--primary-strong)}
.text-link:hover::after{transform:scaleX(1)}

/* ============ 标签 / 徽章 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--primary-soft);color:#0E7F6C;
}
.tag--accent{background:rgba(255,106,61,.12);color:#C6431D}
.tag--outline{background:transparent;border:1px solid var(--line-mid);color:var(--ink-600)}
.tag--ondark{background:rgba(33,199,168,.16);color:#5FE3C9}
.badge-live{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--accent)}
.badge-live::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:80;padding:12px 0 0}
.header-card{
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:16px;
  box-shadow:var(--sh-1);
  display:flex;align-items:center;gap:16px;
  padding:10px 14px;transition:box-shadow var(--t),border-color var(--t),background-color var(--t);
}
.site-header.is-stuck .header-card{box-shadow:var(--sh-2);border-color:var(--line-mid)}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand__mark{width:30px;height:30px;display:grid;place-items:center;border-radius:9px;background:rgba(33,199,168,.12)}
.brand__mark svg{width:20px;height:20px}
.brand__text{font-size:19px;font-weight:800;color:var(--ink-900);letter-spacing:-.02em}
.brand__text em{font-family:var(--font-num);font-style:normal;font-weight:500;font-size:17px;color:var(--primary-strong);margin-left:1px}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 13px;border-radius:var(--r-btn);
  font-size:13px;font-weight:600;color:var(--ink-600);
  border:1px solid transparent;position:relative;
}
.nav-link svg{width:18px;height:18px;color:var(--ink-400);transition:color var(--t)}
.nav-link:hover{background:var(--primary-soft);color:var(--ink-900)}
.nav-link:hover svg{color:var(--primary-strong)}
.nav-link.is-active{color:var(--ink-900);border-color:rgba(33,199,168,.4);background:#FFFFFF}
.nav-link.is-active svg{color:var(--primary-strong)}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--primary)}
.header-actions{display:flex;align-items:center;gap:10px;flex:none}
.header-cta{padding:11px 20px;font-size:14px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#FFFFFF;position:relative;flex:none;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--ink-900);
  transform:translateX(-50%);transition:all var(--t);
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* 移动端抽屉 */
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--base);
  padding:80px 20px 120px;transform:translateY(-8px);opacity:0;visibility:hidden;
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms;overflow-y:auto;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer__title{font-family:var(--font-num);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-400);margin-bottom:14px}
.drawer__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.drawer__item{
  display:flex;flex-direction:column;gap:10px;padding:16px;
  background:#FFFFFF;border:1px solid var(--line);border-radius:var(--r-card);
}
.drawer__item svg{width:20px;height:20px;color:var(--primary-strong)}
.drawer__item span{font-size:14px;font-weight:600;color:var(--ink-900)}
.drawer__item.is-active{border-color:rgba(33,199,168,.5)}
.drawer__cta{
  position:fixed;left:16px;right:16px;bottom:16px;z-index:95;
  display:none;padding:12px;background:rgba(255,255,255,.94);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-2);
}
.drawer__cta.is-open{display:block}

/* ============ 分类页头 ============ */
.cat-hero{
  position:relative;margin:18px 12px 0;border-radius:var(--r-block);overflow:hidden;
  background-image:linear-gradient(180deg,rgba(18,20,28,.84) 0%,rgba(18,20,28,.92) 100%),
                   url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  color:var(--on-ink);
  padding:clamp(56px,8vw,110px) 0 clamp(40px,5vw,64px);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:46px 46px;opacity:.06;
}
.cat-hero .container{position:relative;z-index:2}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--on-ink-2);margin-bottom:26px;flex-wrap:wrap}
.crumbs a:hover{color:var(--primary)}
.crumbs span[aria-current]{color:var(--on-ink)}
.cat-hero h1{color:var(--on-ink);max-width:900px}
.cat-hero .lead{color:var(--on-ink-2);margin-top:20px}
.cat-hero__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}

/* 横向锚点 chip 条 */
.chipbar{position:sticky;top:78px;z-index:40;padding:14px 0 0}
.chipbar__inner{
  display:flex;gap:8px;overflow-x:auto;padding:10px;scrollbar-width:none;
  background:rgba(255,255,255,.94);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-1);
}
.chipbar__inner::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;gap:8px;flex:none;
  padding:9px 15px;border-radius:var(--r-btn);
  font-size:13px;font-weight:600;color:var(--ink-600);
  border:1px solid transparent;background:transparent;transition:all var(--t);
}
.chip:hover{background:var(--primary-soft);color:var(--ink-900)}
.chip.is-active{border-color:rgba(33,199,168,.45);background:#FFFFFF;color:var(--ink-900);box-shadow:var(--sh-1)}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--primary)}

/* ============ 数据总览卡 ============ */
.overview{display:grid;grid-template-columns:1.25fr .9fr;gap:24px;align-items:start}
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-2px);border-color:rgba(33,199,168,.4);box-shadow:var(--sh-2)}
.card__body{padding:26px}
.card__title{font-size:1.25rem;font-weight:700;color:var(--ink-900);line-height:1.4}
.card__desc{margin-top:10px;font-size:15px;line-height:1.8;color:var(--ink-600);max-width:none}
.card__meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:18px;font-size:13px;color:var(--ink-400)}

/* 规格行卡 */
.spec-card{padding:10px 26px 16px}
.spec-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:15px 0;border-bottom:1px solid var(--line)}
.spec-row:last-child{border-bottom:0}
.spec-row__label{display:inline-flex;align-items:center;gap:10px;font-size:14px;color:var(--ink-600)}
.spec-row__label i{width:6px;height:6px;border-radius:50%;background:var(--primary);flex:none}
.spec-row__value{font-family:var(--font-num);font-size:15px;font-weight:600;color:var(--ink-900);text-align:right}
.spec-note{margin-top:14px;font-size:13px;color:var(--ink-400);max-width:none}

/* 指标小格 */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
.metric{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-1)}
.metric__num{font-family:var(--font-num);font-size:clamp(1.6rem,2.4vw,2.1rem);font-weight:700;color:var(--ink-900);line-height:1.1}
.metric__num small{font-size:.5em;color:var(--ink-400);font-weight:600;margin-left:4px}
.metric__label{margin-top:8px;font-size:13px;color:var(--ink-400)}

/* ============ 交替图文块 ============ */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(28px,4vw,64px);align-items:center}
.split--reverse .split__media{order:2}
.split--reverse .split__text{order:1}
.split__media{border-radius:var(--r-block);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);background:var(--paper)}
.split__media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.split__text h2{font-size:clamp(1.5rem,2.6vw,2.15rem)}
.split__text p{margin-top:16px}
.split__media--portrait img{aspect-ratio:4/3}
.section-anchor{padding-top:14px}

/* 主色序号要点 */
.numbered{margin-top:22px;display:grid;gap:14px;counter-reset:item}
.numbered li{
  position:relative;padding-left:46px;font-size:15.5px;line-height:1.75;color:var(--ink-600);
  counter-increment:item;
}
.numbered li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;left:0;top:2px;
  font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--primary-strong);
  width:32px;height:32px;display:grid;place-items:center;
  border:1px solid rgba(33,199,168,.4);border-radius:9px;background:var(--primary-soft);
}
.numbered li strong{display:block;color:var(--ink-900);font-size:16px;margin-bottom:2px}

/* 深墨数据条 */
.databar{
  background:var(--ink);color:var(--on-ink);border-radius:var(--r-block);
  padding:clamp(28px,4vw,46px);
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  position:relative;overflow:hidden;margin:clamp(56px,7vw,96px) 0;
}
.databar::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:42px 42px;opacity:.05;pointer-events:none;
}
.databar__item{position:relative;z-index:2}
.databar__item + .databar__item{border-left:1px solid var(--on-ink-line);padding-left:24px}
.databar__num{font-family:var(--font-num);font-size:clamp(1.7rem,3vw,2.4rem);font-weight:700;color:var(--on-ink);line-height:1.1}
.databar__num small{font-size:.45em;color:var(--primary);margin-left:4px;font-weight:600}
.databar__label{margin-top:8px;font-size:13.5px;color:var(--on-ink-2)}

/* 表格 */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);background:var(--paper);box-shadow:var(--sh-1)}
table{width:100%;border-collapse:collapse;min-width:560px;font-size:15px}
th,td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line)}
th{font-size:13px;font-weight:700;color:var(--ink-900);background:#FBFAF7;letter-spacing:.02em}
tbody tr:nth-child(even){background:#FCFBF9}
tbody tr:last-child td{border-bottom:0}
td.num{font-family:var(--font-num);color:var(--ink-900);font-weight:600}

/* ============ 相关分类互链 ============ */
.crosslink{
  display:grid;grid-template-columns:1.1fr .9fr;gap:0;align-items:stretch;
  overflow:hidden;border-radius:var(--r-block);border:1px solid var(--line);background:var(--paper);box-shadow:var(--sh-1);
}
.crosslink__text{padding:clamp(26px,3.4vw,44px)}
.crosslink__media{position:relative;min-height:240px}
.crosslink__media img{width:100%;height:100%;object-fit:cover}
.crosslink__media::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,20,28,.18),rgba(18,20,28,0))}

/* ============ FAQ ============ */
.faq{max-width:820px;margin:0 auto;display:grid;gap:12px}
.faq-item{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden}
.faq-item__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;font-size:16.5px;font-weight:700;color:var(--ink-900);
}
.faq-item__q:hover{color:var(--primary-strong)}
.faq-item__icon{
  flex:none;width:30px;height:30px;border-radius:9px;border:1px solid var(--line-mid);
  display:grid;place-items:center;color:var(--ink-600);transition:transform var(--t),background-color var(--t),color var(--t),border-color var(--t);
}
.faq-item__icon svg{width:15px;height:15px}
.faq-item.is-open .faq-item__icon{transform:rotate(45deg);background:var(--primary);border-color:var(--primary);color:#04231D}
.faq-item__a{max-height:0;overflow:hidden;transition:max-height 300ms var(--ease)}
.faq-item__a p{padding:0 22px 22px;color:var(--ink-600);font-size:15.5px;max-width:none}

/* ============ 下载 CTA ============ */
.cta-block{
  background:var(--ink);color:var(--on-ink);border-radius:var(--r-block);
  margin:0 12px;padding:clamp(48px,7vw,88px) 0;position:relative;overflow:hidden;text-align:center;
}
.cta-block::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:40px 40px;opacity:.05;
}
.cta-block .container{position:relative;z-index:2}
.cta-block h2{color:var(--on-ink)}
.cta-block p{color:var(--on-ink-2);margin:16px auto 0}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:32px}
.cta-foot{
  display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:14px 26px;
  margin-top:30px;font-size:13.5px;color:var(--on-ink-2);
}
.cta-foot .num{color:var(--on-ink);font-weight:600}
.qr{
  width:112px;height:112px;border-radius:var(--r-img);background:#FFFFFF;
  display:grid;place-items:center;margin:38px auto 0;
  background-image:linear-gradient(90deg,#12141C 22%,transparent 22%,transparent 78%,#12141C 78%),
                   linear-gradient(0deg,#12141C 22%,transparent 22%,transparent 78%,#12141C 78%);
  background-size:14px 14px;border:6px solid #FFFFFF;box-shadow:0 12px 30px -16px rgba(0,0,0,.6);
  position:relative;
}
.qr span{position:relative;z-index:2;font-family:var(--font-num);font-size:11px;font-weight:700;color:var(--ink-900);background:rgba(255,255,255,.92);padding:2px 6px;border-radius:4px}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:var(--on-ink-2);margin-top:clamp(56px,7vw,96px);padding:clamp(48px,6vw,80px) 0 32px;position:relative}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(33,199,168,0),rgba(33,199,168,.75),rgba(255,106,61,.5),rgba(33,199,168,0));
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px 32px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand__mark{background:rgba(33,199,168,.14)}
.footer-brand__text{font-size:19px;font-weight:800;color:var(--on-ink);letter-spacing:-.02em}
.footer-brand__text em{font-family:var(--font-num);font-style:normal;font-weight:500;font-size:17px;color:var(--primary)}
.footer-desc{font-size:14.5px;line-height:1.8;color:var(--on-ink-2);max-width:340px}
.footer-col h4{font-size:14px;color:var(--on-ink);margin-bottom:16px;letter-spacing:0}
.footer-links{display:grid;gap:11px}
.footer-links a{font-size:14.5px;color:var(--on-ink-2);display:inline-block}
.footer-links a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact{font-size:14px;color:var(--on-ink-2);margin-bottom:14px;max-width:340px}
.sub-form__label{display:block;font-size:13px;color:var(--on-ink-2);margin-bottom:8px}
.sub-form__row{display:flex;gap:10px}
.sub-form input{
  flex:1;min-width:0;height:44px;padding:0 14px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.06);border:1px solid var(--on-ink-line);color:var(--on-ink);
  transition:border-color var(--t),box-shadow var(--t),background-color var(--t);
}
.sub-form input::placeholder{color:rgba(242,243,245,.42)}
.sub-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(33,199,168,.22);background:rgba(255,255,255,.1)}
.sub-form.is-error input{border-color:var(--danger);box-shadow:0 0 0 2px rgba(229,72,77,.2)}
.sub-form__msg{margin-top:10px;font-size:13px;min-height:20px;color:var(--on-ink-2)}
.sub-form.is-error .sub-form__msg{color:#FF9A9C}
.sub-form.is-success .sub-form__msg{color:#04231D;background:var(--primary);display:inline-block;padding:6px 12px;border-radius:var(--r-btn);font-weight:600}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--on-ink-line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:rgba(242,243,245,.5);
}

/* ============ 滚动淡入 ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-visible{opacity:1;transform:translateY(0)}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .nav-link{padding:9px 10px;font-size:12.5px;gap:6px}
  .nav-link svg{width:16px;height:16px}
  .header-cta{padding:10px 16px;font-size:13px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:36px 28px}
  .footer-grid > .footer-col:last-child{grid-column:1 / -1}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:block}
  .header-cta{display:none}
  .header-card{justify-content:space-between}
  .chipbar{position:static;padding-top:10px}
  .overview{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:26px}
  .split--reverse .split__media{order:1}
  .split--reverse .split__text{order:2}
  .databar{grid-template-columns:repeat(2,1fr);gap:22px}
  .databar__item + .databar__item{padding-left:0;border-left:0}
  .databar__item:nth-child(even){border-left:1px solid var(--on-ink-line);padding-left:22px}
  .crosslink{grid-template-columns:1fr}
  .crosslink__media{min-height:200px;order:-1}
  .crosslink__media::after{background:linear-gradient(180deg,rgba(18,20,28,0),rgba(18,20,28,.2))}
}
@media (max-width:767px){
  :root{--pad-x:20px}
  body{font-size:16px;line-height:1.8}
  .site-header{padding-top:10px}
  .section--dark,.cta-block{margin:0 8px;border-radius:22px}
  .cat-hero{margin:10px 8px 0;border-radius:22px}
  .metrics{grid-template-columns:1fr}
  .databar{grid-template-columns:1fr;gap:18px}
  .databar__item:nth-child(even){border-left:0;padding-left:0}
  .databar__item{padding-bottom:16px;border-bottom:1px solid var(--on-ink-line)}
  .databar__item:last-child{border-bottom:0;padding-bottom:0}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .card__body{padding:20px}
  .spec-card{padding:6px 20px 12px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;gap:8px}
  .sub-form__row{flex-direction:column}
  .sub-form input{width:100%}
  .sub-form .btn{width:100%}
  .faq-item__q{padding:16px;font-size:15.5px}
  .faq-item__a p{padding:0 16px 18px}
}
@media (max-width:520px){
  h1{font-size:clamp(1.9rem,8vw,2.4rem)}
  .lead{font-size:16px}
  .numbered li{padding-left:40px}
  .metric__num{font-size:1.6rem}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}