/* roulang page: index */
:root{
  --brand:#E2542A;
  --brand-dark:#B93F1C;
  --brand-light:#FBE9E2;
  --sec:#0F6E63;
  --sec-dark:#0A4F47;
  --sec-light:#E3F1EF;
  --accent:#F2C14E;
  --ink:#191A1C;
  --ink2:#5A6065;
  --ink3:#8B9096;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --tint:#F3EDE6;
  --dark:#121E1C;
  --line:#E6DED4;
  --line-soft:#EFE8E0;
  --r-xs:8px;
  --r-sm:10px;
  --r:12px;
  --r-lg:16px;
  --r-xl:20px;
  --sh-card:0 2px 10px rgba(25,26,28,.06);
  --sh-hover:0 10px 28px rgba(226,84,42,.14);
  --sh-dark:0 18px 40px rgba(18,30,28,.18);
  --container:1200px;
  --bs-body-font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  letter-spacing:0;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:hover{color:var(--brand);}
button,input,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(226,84,42,.4);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;}

.container{max-width:var(--container);padding-left:16px;padding-right:16px;margin:0 auto;}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:1200px){.container{padding-left:32px;padding-right:32px;}}

/* ---------- 按钮 ---------- */
.btn-brand,.btn-ghost,.btn-sec,.btn-text{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:16px;font-weight:600;border-radius:var(--r-sm);cursor:pointer;transition:all .22s ease;border:1.5px solid transparent;}
.btn-brand{background:var(--brand);color:#fff;padding:12px 26px;min-height:46px;box-shadow:0 6px 18px rgba(226,84,42,.22);}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(226,84,42,.3);}
.btn-brand:active{transform:translateY(0);box-shadow:0 4px 12px rgba(226,84,42,.2);}
.btn-sec{background:transparent;color:var(--sec);border-color:var(--sec);padding:12px 24px;min-height:46px;}
.btn-sec:hover{background:rgba(15,110,99,.08);border-color:var(--sec-dark);color:var(--sec-dark);}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.32);padding:12px 24px;min-height:46px;}
.btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.6);}
.btn-text{background:none;border:none;color:var(--brand);padding:4px 0;font-weight:600;min-height:auto;}
.btn-text:hover{color:var(--brand-dark);text-decoration:underline;}
.btn-text .arw{transition:transform .2s ease;}
.btn-text:hover .arw{transform:translateX(4px);}
.btn-brand[disabled],.btn-brand:disabled{background:var(--line);color:var(--ink3);box-shadow:none;cursor:not-allowed;}
@media (max-width:575.98px){.btn-brand,.btn-ghost,.btn-sec{width:100%;}}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,248,244,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:height .25s ease,box-shadow .25s ease,border-color .25s ease,background-color .25s ease;
  height:82px;
}
.site-header.is-scrolled{height:64px;border-bottom-color:var(--line);box-shadow:0 6px 22px rgba(25,26,28,.07);}
.header-inner{display:flex;align-items:center;gap:18px;height:100%;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:38px;height:38px;border-radius:var(--r-sm);background:var(--brand);display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(226,84,42,.28);}
.site-header.is-scrolled .brand-mark{width:34px;height:34px;}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:11px;color:var(--ink3);letter-spacing:.14em;}
.nav-panel{flex:1 1 auto;min-width:0;}
.nav-cards{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:6px;box-shadow:var(--sh-card);}
.nav-card{
  position:relative;display:flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:var(--r);font-size:14.5px;font-weight:500;color:var(--ink2);
  white-space:nowrap;transition:all .2s ease;
}
.nav-card svg{width:17px;height:17px;color:var(--sec);flex:0 0 auto;transition:color .2s ease;}
.nav-card:hover{background:var(--brand-light);color:var(--brand);transform:translateY(-1px);}
.nav-card:hover svg{color:var(--brand);}
.nav-card.active{background:var(--brand-light);color:var(--brand);font-weight:600;}
.nav-card.active svg{color:var(--brand);}
.nav-card.active::before{content:"";position:absolute;left:0;top:22%;bottom:22%;width:3px;border-radius:3px;background:var(--brand);}
.header-cta{flex:0 0 auto;}
.header-cta .btn-brand{padding:11px 22px;min-height:44px;font-size:15px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--surface);align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:all .2s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
@media (min-width:992px){
  .nav-panel.collapse{display:block !important;height:auto !important;visibility:visible !important;}
}
@media (max-width:991.98px){
  .site-header{height:auto;}
  .header-inner{flex-wrap:wrap;padding-top:12px;padding-bottom:12px;gap:12px;}
  .nav-toggle{display:flex;margin-left:auto;order:2;}
  .header-cta{order:3;display:none;}
  .nav-panel{order:4;flex-basis:100%;width:100%;}
  .nav-cards{flex-direction:column;align-items:stretch;gap:6px;padding:10px;margin-top:4px;}
  .nav-card{padding:12px 14px;font-size:15px;border-bottom:none;}
  .nav-card.active::before{left:12%;right:12%;top:auto;bottom:0;width:auto;height:2px;}
  .nav-card.active{background:var(--brand-light);}
}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--dark);color:#fff;overflow:hidden;padding:74px 0 66px;}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.3;}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,#121E1C 6%,rgba(18,30,28,.9) 44%,rgba(18,30,28,.52) 100%);}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;letter-spacing:.06em;color:rgba(255,255,255,.82);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);padding:6px 14px;border-radius:999px;}
.hero-eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--accent);display:block;}
.hero h1{font-size:42px;line-height:1.24;margin:20px 0 0;color:#fff;}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.8;color:rgba(255,255,255,.76);max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-metrics{display:flex;flex-wrap:wrap;gap:34px;margin-top:38px;padding-top:26px;border-top:1px solid rgba(255,255,255,.14);}
.hero-metrics li{display:flex;flex-direction:column;gap:2px;}
.hero-metrics strong{font-size:26px;font-weight:700;color:var(--accent);letter-spacing:.01em;font-variant-numeric:tabular-nums;}
.hero-metrics span{font-size:13px;color:rgba(255,255,255,.66);letter-spacing:.02em;}
.hero-visual{position:relative;}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-xl);box-shadow:var(--sh-dark);}
.hero-play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:68px;height:68px;border-radius:50%;background:rgba(226,84,42,.94);color:#fff;
  display:flex;align-items:center;justify-content:center;box-shadow:0 12px 30px rgba(0,0,0,.34);
  transition:transform .22s ease,background-color .22s ease;
}
.hero-play:hover{transform:translate(-50%,-50%) scale(1.07);background:var(--brand-dark);color:#fff;}
.hero-play svg{width:24px;height:24px;margin-left:3px;}
.hero-chip{
  position:absolute;right:-10px;bottom:-18px;background:var(--surface);color:var(--ink);
  border-radius:var(--r-lg);padding:14px 18px;box-shadow:0 14px 34px rgba(0,0,0,.24);
  display:flex;align-items:center;gap:12px;
}
.hero-chip .dot{width:9px;height:9px;border-radius:50%;background:var(--sec);}
.hero-chip b{font-size:15px;font-weight:700;}
.hero-chip small{display:block;font-size:12.5px;color:var(--ink3);}
@media (max-width:991.98px){
  .hero{padding:52px 0 56px;}
  .hero-inner{grid-template-columns:1fr;gap:36px;}
  .hero h1{font-size:32px;}
  .hero-sub{font-size:16px;}
  .hero-visual{order:2;}
  .hero-chip{right:8px;bottom:-14px;padding:10px 14px;}
}
@media (max-width:575.98px){
  .hero h1{font-size:27px;}
  .hero-metrics{gap:22px;}
  .hero-metrics strong{font-size:22px;}
  .hero-play{width:56px;height:56px;}
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section.tint{background:var(--tint);}
.section.dark{background:var(--dark);color:#fff;}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--sec);text-transform:uppercase;}
.eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--brand);display:block;}
.section-head.center .eyebrow{justify-content:center;}
.section-head.center .eyebrow::before{display:none;}
.section-head h2{font-size:32px;margin-top:14px;}
.section-head p{margin-top:14px;color:var(--ink2);font-size:16.5px;line-height:1.8;}
.section.dark .section-head h2{color:#fff;}
.section.dark .section-head p{color:rgba(255,255,255,.72);}
.section.dark .eyebrow{color:var(--accent);}
@media (max-width:767.98px){
  .section{padding:56px 0;}
  .section-head{margin-bottom:30px;}
  .section-head h2{font-size:24px;}
  .section-head p{font-size:15.5px;}
}

/* ---------- 三步上手 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;position:relative;}
.step{position:relative;padding:30px 28px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-card);transition:all .25s ease;}
.step:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(226,84,42,.3);}
.steps .step:not(:first-child){margin-left:26px;}
.steps .step:not(:last-child)::after{
  content:"";position:absolute;right:-24px;top:50%;width:22px;height:0;
  border-top:2px dashed rgba(226,84,42,.4);
}
.step-no{font-size:38px;font-weight:700;color:var(--brand-light);line-height:1;font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.step h3{font-size:19px;margin-top:6px;}
.step p{margin-top:10px;font-size:15.5px;color:var(--ink2);line-height:1.75;}
.step .step-ico{width:40px;height:40px;border-radius:var(--r-sm);background:var(--sec-light);display:flex;align-items:center;justify-content:center;color:var(--sec);margin-bottom:14px;}
.step .step-ico svg{width:21px;height:21px;}
@media (max-width:991.98px){
  .steps{grid-template-columns:1fr;}
  .steps .step:not(:first-child){margin-left:0;margin-top:16px;}
  .steps .step:not(:last-child)::after{display:none;}
  .step{padding:24px 22px;}
}

/* ---------- 服务通道卡片 ---------- */
.channels{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.channel-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-card);transition:all .26s ease;
}
.channel-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(226,84,42,.3);}
.channel-thumb{position:relative;overflow:hidden;}
.channel-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .35s ease;}
.channel-card:hover .channel-thumb img{transform:scale(1.04);}
.channel-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.channel-body h3{font-size:18px;}
.channel-body p{font-size:14.5px;color:var(--ink2);line-height:1.7;}
.channel-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--line-soft);}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--sec);background:var(--sec-light);border-radius:999px;padding:4px 12px;letter-spacing:.02em;}
.chip.orange{color:var(--brand);background:var(--brand-light);}
@media (max-width:991.98px){.channels{grid-template-columns:repeat(2,1fr);gap:18px;}}
@media (max-width:575.98px){.channels{grid-template-columns:1fr;}}

/* ---------- 案例证明 ---------- */
.cases{display:grid;grid-template-columns:7fr 5fr;gap:24px;}
.case-main{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-card);border:1px solid var(--line);background:var(--surface);}
.case-main img{width:100%;height:100%;min-height:380px;object-fit:cover;}
.case-overlay{
  position:absolute;inset:auto 0 0 0;padding:30px;
  background:linear-gradient(180deg,rgba(18,30,28,0) 0%,rgba(18,30,28,.86) 62%);
  color:#fff;
}
.case-overlay h3{font-size:22px;color:#fff;}
.case-overlay p{margin-top:10px;font-size:15px;color:rgba(255,255,255,.78);line-height:1.75;max-width:520px;}
.case-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.case-tags .chip{background:rgba(255,255,255,.14);color:#fff;}
.case-side{display:grid;grid-template-rows:1fr 1fr;gap:24px;}
.case-mini{
  display:flex;gap:16px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:16px;box-shadow:var(--sh-card);transition:all .25s ease;
}
.case-mini:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(226,84,42,.3);}
.case-mini img{width:130px;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r);flex:0 0 auto;}
.case-mini h3{font-size:17px;line-height:1.5;}
.case-mini p{margin-top:8px;font-size:14px;color:var(--ink2);line-height:1.7;}
.case-mini .chip{margin-top:10px;}
@media (max-width:991.98px){
  .cases{grid-template-columns:1fr;}
  .case-main img{min-height:280px;}
  .case-side{grid-template-rows:auto auto;}
}
@media (max-width:575.98px){
  .case-mini{flex-direction:column;}
  .case-mini img{width:100%;aspect-ratio:16/9;}
}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.faq-side h2{font-size:30px;}
.faq-side p{margin-top:14px;color:var(--ink2);font-size:16px;line-height:1.8;max-width:280px;}
.faq-side .btn-sec{margin-top:24px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{border:1px solid var(--line);border-radius:var(--r);background:var(--surface);overflow:hidden;transition:all .22s ease;}
.faq-item:hover{border-color:rgba(226,84,42,.3);}
.faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--ink);transition:all .2s ease;
}
.faq-btn:hover{color:var(--brand);}
.faq-sign{flex:0 0 auto;width:22px;height:22px;position:relative;}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;transform:translate(-50%,-50%);}
.faq-sign::before{width:14px;height:2px;}
.faq-sign::after{width:2px;height:14px;transition:transform .22s ease;}
.faq-btn:not(.collapsed){color:var(--brand);}
.faq-btn:not(.collapsed) .faq-sign::after{transform:translate(-50%,-50%) rotate(90deg);}
.faq-item:has(.faq-btn:not(.collapsed)){background:var(--brand-light);border-left:3px solid var(--brand);}
.faq-body{padding:0 20px 20px;font-size:15.5px;color:var(--ink2);line-height:1.85;border-top:1px solid rgba(226,84,42,.16);margin-top:0;padding-top:16px;}
@media (max-width:991.98px){
  .faq-wrap{grid-template-columns:1fr;gap:26px;}
  .faq-side p{max-width:none;}
}

/* ---------- 立即开通 ---------- */
.signup{background:var(--dark);color:#fff;position:relative;overflow:hidden;}
.signup::before{
  content:"";position:absolute;right:-140px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(226,84,42,.24) 0%,rgba(226,84,42,0) 70%);
}
.signup-inner{position:relative;z-index:2;display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;}
.signup h2{font-size:32px;color:#fff;}
.signup .lead{margin-top:16px;font-size:16.5px;color:rgba(255,255,255,.74);line-height:1.85;max-width:420px;}
.signup-points{margin-top:26px;display:flex;flex-direction:column;gap:12px;}
.signup-points li{display:flex;align-items:center;gap:10px;font-size:15px;color:rgba(255,255,255,.82);}
.signup-points svg{width:18px;height:18px;color:var(--accent);flex:0 0 auto;}
.form-card{background:var(--surface);border-radius:var(--r-xl);padding:30px;box-shadow:var(--sh-dark);color:var(--ink);}
.form-card h3{font-size:20px;}
.form-card .hint{margin-top:8px;font-size:14px;color:var(--ink3);}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:14px;font-weight:600;color:var(--ink2);}
.field input,.field textarea{
  width:100%;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;color:var(--ink);transition:all .2s ease;font-size:15px;
}
.field textarea{height:92px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(226,84,42,.12);}
.form-note{margin-top:14px;font-size:13px;color:var(--ink3);line-height:1.7;}
.form-actions{margin-top:20px;}
.form-actions .btn-brand{width:100%;}
.form-status{margin-top:14px;font-size:14px;font-weight:600;display:none;}
.form-status.ok{display:block;color:#2E8B6E;}
.form-status.err{display:block;color:#C0392B;}
@media (max-width:991.98px){
  .signup-inner{grid-template-columns:1fr;gap:32px;}
  .signup h2{font-size:25px;}
  .form-card{padding:22px;}
  .form-grid{grid-template-columns:1fr;}
}

/* ---------- 最新信息 ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px;}
.news-head h2{font-size:32px;margin-top:14px;}
.news-head p{margin-top:12px;color:var(--ink2);font-size:16px;max-width:620px;}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-card);transition:all .26s ease;height:100%;}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(226,84,42,.3);}
.news-link{display:flex;flex-direction:column;height:100%;}
.news-thumb{overflow:hidden;}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease;}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-title{font-size:17.5px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s ease;}
.news-card:hover .news-title{color:var(--brand);}
.news-desc{font-size:14.5px;color:var(--ink2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:14px;border-top:1px solid var(--line-soft);font-size:13px;color:var(--ink3);}
.news-meta .go{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:4px;}
.news-card:hover .news-meta .go .arw{transform:translateX(3px);}
.news-meta .go .arw{transition:transform .2s ease;}
.empty-state{
  grid-column:1 / -1;min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-lg);padding:40px 20px;text-align:center;
}
.empty-state .ic{width:52px;height:52px;border-radius:50%;background:rgba(226,84,42,.14);display:flex;align-items:center;justify-content:center;color:var(--brand);}
.empty-state .ic svg{width:24px;height:24px;}
.empty-state p{color:var(--ink2);font-size:15.5px;}
@media (max-width:1199.98px){.news-grid{grid-template-columns:repeat(3,1fr);}}
@media (max-width:991.98px){.news-grid{grid-template-columns:repeat(2,1fr);gap:18px;}}
@media (max-width:575.98px){.news-grid{grid-template-columns:1fr;}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#C9D3D0;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text em{color:rgba(255,255,255,.5);}
.footer-brand p{margin-top:18px;font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.66);max-width:300px;}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.08em;margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:#C9D3D0;display:inline-block;padding-bottom:2px;border-bottom:2px solid transparent;}
.footer-col a:hover{color:#fff;border-bottom-color:var(--brand);}
.footer-col li span{font-size:14px;color:rgba(255,255,255,.66);line-height:1.8;display:block;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.56);}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:#fff;}
@media (max-width:991.98px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;}}
@media (max-width:575.98px){.footer-grid{grid-template-columns:1fr;gap:28px;}.site-footer{padding-top:48px;}}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;
  background:var(--dark);color:#fff;border:none;display:flex;align-items:center;justify-content:center;
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .25s ease;z-index:1040;
  box-shadow:var(--sh-dark);
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:var(--brand);}
.back-top svg{width:20px;height:20px;}
@media (max-width:575.98px){.back-top{right:14px;bottom:16px;width:42px;height:42px;}}

/* roulang page: category1 */
:root{
  --brand:#E2542A;
  --brand-dark:#B93F1C;
  --brand-soft:#FBE9E2;
  --teal:#0F6E63;
  --teal-soft:#E3F1EF;
  --teal-dark:#0A4F47;
  --yellow:#F2C14E;
  --ink:#191A1C;
  --ink-2:#5A6065;
  --ink-3:#8B9096;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --surface-2:#F3EDE6;
  --dark:#121E1C;
  --line:#E6DED4;
  --line-2:#EFE8E0;
  --r-btn:10px;
  --r-sm:12px;
  --r-lg:16px;
  --r-hero:20px;
  --r-pill:999px;
  --sh-card:0 2px 10px rgba(25,26,28,.06);
  --sh-hover:0 10px 28px rgba(226,84,42,.14);
  --sh-dark:0 18px 40px rgba(18,30,28,.18);
  --font-cn:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:var(--teal);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--ink);letter-spacing:0;}
p{margin:0 0 1.1em;color:var(--ink-2);}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid rgba(226,84,42,.45);outline-offset:2px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(251,248,244,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,box-shadow .25s ease,height .25s ease,background .25s ease;
}
.site-header.scrolled{
  border-bottom:1px solid var(--line);
  box-shadow:0 4px 18px rgba(25,26,28,.07);
  background:rgba(251,248,244,.92);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:78px;
  transition:min-height .25s ease;
}
.site-header.scrolled .header-inner{min-height:64px;}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  color:var(--ink);
}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:38px;height:38px;
  border-radius:11px;
  background:linear-gradient(140deg,var(--brand),var(--brand-dark));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(226,84,42,.28);
  flex-shrink:0;
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--ink-3);letter-spacing:.06em;}

.nav-panel{flex:1 1 auto;min-width:0;}
.nav-cards{
  display:flex;
  align-items:center;
  gap:8px;
  padding:6px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-card);
  overflow-x:auto;
  scrollbar-width:none;
}
.nav-cards::-webkit-scrollbar{display:none;}
.nav-card{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:9px 13px;
  border-radius:var(--r-sm);
  font-size:14px;
  font-weight:600;
  color:var(--ink-2);
  background:var(--surface-2);
  white-space:nowrap;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.nav-card svg{width:18px;height:18px;flex-shrink:0;color:var(--teal);transition:color .2s ease;}
.nav-card:hover{
  background:var(--brand-soft);
  color:var(--brand-dark);
  transform:translateY(-1px);
}
.nav-card:hover svg{color:var(--brand);}
.nav-card.active{
  background:var(--brand-soft);
  color:var(--brand-dark);
}
.nav-card.active svg{color:var(--brand);}
.nav-card.active::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:3px;height:20px;
  border-radius:0 3px 3px 0;
  background:var(--brand);
}

.header-cta{flex-shrink:0;}
.btn-brand{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:11px 22px;
  border-radius:var(--r-btn);
  background:var(--brand);
  color:#fff;
  font-size:15px;
  font-weight:600;
  border:0;
  box-shadow:0 4px 14px rgba(226,84,42,.24);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(226,84,42,.3);}
.btn-brand:active{transform:translateY(0);}
.btn-brand:focus-visible{outline:2px solid rgba(226,84,42,.4);outline-offset:2px;}

.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:11px 22px;
  border-radius:var(--r-btn);
  border:1.5px solid var(--teal);
  background:transparent;
  color:var(--teal);
  font-size:15px;
  font-weight:600;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-ghost:hover{background:rgba(15,110,99,.08);border-color:var(--teal-dark);color:var(--teal-dark);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}

.btn-text{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand);
  font-weight:600;
  font-size:15px;
  background:none;
  border:0;
  padding:4px 0;
}
.btn-text i{transition:transform .2s ease;}
.btn-text:hover{color:var(--brand-dark);text-decoration:underline;}
.btn-text:hover i{transform:translateX(4px);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--surface);
  padding:0;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  margin-left:auto;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle:not(.collapsed) span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle:not(.collapsed) span:nth-child(2){opacity:0;}
.nav-toggle:not(.collapsed) span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- breadcrumb ---------- */
.crumb-bar{padding:18px 0 4px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);}
.crumb a{color:var(--ink-3);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--line);}
.crumb .now{color:var(--brand-dark);font-weight:600;}

/* ---------- hero ---------- */
.hero-section{padding:14px 0 0;}
.hero-cat{
  position:relative;
  border-radius:var(--r-hero);
  overflow:hidden;
  padding:40px 40px;
  min-height:210px;
  display:flex;
  align-items:center;
  background-image:linear-gradient(100deg,rgba(18,30,28,.84) 0%,rgba(18,30,28,.58) 52%,rgba(18,30,28,.32) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  box-shadow:var(--sh-dark);
}
.hero-cat-inner{max-width:660px;position:relative;}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 13px;
  border-radius:var(--r-pill);
  background:rgba(242,193,78,.16);
  border:1px solid rgba(242,193,78,.4);
  color:var(--yellow);
  font-size:12.5px;
  letter-spacing:.04em;
  margin-bottom:16px;
}
.hero-cat h1{
  font-size:clamp(26px,3.4vw,38px);
  color:#fff;
  margin-bottom:14px;
}
.hero-cat p{
  color:rgba(255,255,255,.84);
  font-size:16px;
  margin:0;
  max-width:560px;
}

/* ---------- metric strip ---------- */
.metric-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  margin-top:-28px;
  position:relative;
  z-index:2;
  padding:0 4px;
}
.metric{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:16px 18px;
  box-shadow:var(--sh-card);
}
.metric strong{
  display:block;
  font-size:24px;
  font-weight:700;
  color:var(--brand);
  line-height:1.2;
}
.metric span{display:block;font-size:13px;color:var(--ink-3);margin-top:4px;letter-spacing:.02em;}

/* ---------- sections ---------- */
.section{padding:76px 0;}
.section.tint{background:var(--surface-2);}
.section-title{max-width:720px;margin-bottom:40px;}
.section-title .eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  color:var(--teal);
  letter-spacing:.1em;
  margin-bottom:10px;
}
.section-title h2{font-size:clamp(22px,2.6vw,31px);margin-bottom:12px;}
.section-title p{margin:0;font-size:16px;}

.split{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.split.rev{grid-template-columns:5fr 7fr;}
.split-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
}
.split-media.tall img{aspect-ratio:5/4;}

.check-list{margin:0 0 1.4em;display:grid;gap:12px;}
.check-list li{
  display:flex;
  gap:11px;
  align-items:flex-start;
  font-size:15.5px;
  color:var(--ink-2);
}
.check-list li i{
  color:var(--brand);
  font-size:14px;
  margin-top:6px;
  flex-shrink:0;
}
.check-list li b{color:var(--ink);font-weight:600;}

.step-row{display:grid;gap:18px;margin-top:6px;}
.step-item{
  display:flex;
  gap:16px;
  align-items:flex-start;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  padding:18px 20px;
  box-shadow:var(--sh-card);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(226,84,42,.3);}
.step-num{
  flex-shrink:0;
  width:40px;height:40px;
  border-radius:var(--r-sm);
  background:var(--brand-soft);
  color:var(--brand-dark);
  font-weight:700;
  font-size:15px;
  display:flex;align-items:center;justify-content:center;
}
.step-item h3{font-size:17px;margin-bottom:5px;}
.step-item p{font-size:14.5px;margin:0;}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.tag-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:7px 15px;
  border-radius:var(--r-pill);
  background:var(--teal-soft);
  color:var(--teal-dark);
  font-size:13.5px;
  font-weight:600;
  border:1px solid rgba(15,110,99,.16);
}
.tag-pill.hot{background:var(--brand-soft);color:var(--brand-dark);border-color:rgba(226,84,42,.18);}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.faq-intro h2{font-size:clamp(22px,2.4vw,29px);margin-bottom:12px;}
.faq-intro p{font-size:15.5px;margin:0;}
.faq-accordion .accordion-item{
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:var(--surface);
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:var(--sh-card);
}
.faq-accordion .accordion-button{
  font-size:16.5px;
  font-weight:600;
  color:var(--ink);
  background:var(--surface);
  padding:17px 20px;
  box-shadow:none;
  border-left:3px solid transparent;
  gap:14px;
}
.faq-accordion .accordion-button::after{
  content:"+";
  background-image:none;
  width:24px;height:24px;
  font-size:20px;
  font-weight:400;
  line-height:1;
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  transform:none;
  margin-left:auto;
  flex-shrink:0;
}
.faq-accordion .accordion-button:not(.collapsed){
  background:var(--brand-soft);
  color:var(--brand-dark);
  border-left-color:var(--brand);
  box-shadow:none;
}
.faq-accordion .accordion-button:not(.collapsed)::after{content:"−";}
.faq-accordion .accordion-button:focus{box-shadow:0 0 0 3px rgba(226,84,42,.16);border-color:rgba(226,84,42,.4);}
.faq-accordion .accordion-body{
  padding:4px 22px 20px;
  font-size:15.5px;
  color:var(--ink-2);
  line-height:1.85;
}

/* ---------- cta ---------- */
.cta-section{padding:0 0 84px;}
.cta-panel{
  background:var(--dark);
  border-radius:var(--r-hero);
  padding:52px 48px;
  color:#fff;
  box-shadow:var(--sh-dark);
  position:relative;
  overflow:hidden;
}
.cta-panel::after{
  content:"";
  position:absolute;
  right:-60px;bottom:-90px;
  width:320px;height:320px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.08);
  background:radial-gradient(circle at 30% 30%,rgba(226,84,42,.22),transparent 70%);
  pointer-events:none;
}
.cta-panel h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:14px;position:relative;}
.cta-panel p{color:rgba(255,255,255,.74);max-width:620px;position:relative;margin-bottom:26px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;}
.cta-panel .btn-brand{box-shadow:0 8px 22px rgba(226,84,42,.34);}
.cta-panel .btn-ghost{border-color:rgba(255,255,255,.55);color:#fff;}
.cta-panel .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--dark);
  color:#C9D3D0;
  padding:60px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:36px;
  padding-bottom:40px;
}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col li{font-size:14px;color:#C9D3D0;line-height:1.7;}
.footer-col a{color:#C9D3D0;font-size:14px;border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease;}
.footer-col a:hover{color:#fff;border-bottom-color:var(--brand);}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text em{color:rgba(255,255,255,.55);}
.footer-brand p{font-size:14px;color:#C9D3D0;margin:0;max-width:300px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;
  right:22px;bottom:26px;
  width:46px;height:46px;
  border-radius:50%;
  background:var(--dark);
  color:#fff;
  border:0;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-dark);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
  z-index:1040;
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{background:var(--brand);transform:translateY(-3px);}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .container{padding-left:24px;padding-right:24px;}
  .split,.split.rev{gap:36px;}
  .faq-wrap{gap:36px;}
}

@media (max-width:991.98px){
  .header-inner{flex-wrap:wrap;min-height:auto;padding-top:12px;padding-bottom:12px;gap:12px;}
  .nav-toggle{display:flex;}
  .nav-panel{
    order:3;
    flex-basis:100%;
    width:100%;
    margin-top:4px;
  }
  .nav-panel.collapse:not(.show){display:none;}
  .nav-cards{
    flex-direction:column;
    align-items:stretch;
    overflow:visible;
    border-radius:var(--r-lg);
  }
  .nav-card{width:100%;padding:12px 14px;}
  .nav-card.active::before{left:0;top:auto;bottom:0;transform:none;width:100%;height:2px;border-radius:2px 2px 0 0;}
  .header-cta{order:2;margin-left:auto;}
  .section{padding:56px 0;}
  .split,.split.rev{grid-template-columns:1fr;gap:26px;}
  .split.rev .split-media{order:-1;}
  .faq-wrap{grid-template-columns:1fr;gap:22px;}
  .metric-strip{grid-template-columns:repeat(2,1fr);margin-top:-20px;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .cta-panel{padding:40px 28px;}
}

@media (max-width:575.98px){
  body{font-size:16px;}
  .container{padding-left:16px;padding-right:16px;}
  .brand-text strong{font-size:16px;}
  .hero-cat{padding:28px 20px;min-height:180px;border-radius:var(--r-lg);}
  .hero-cat p{font-size:15px;}
  .metric-strip{grid-template-columns:1fr;gap:12px;margin-top:16px;padding:0;}
  .section{padding:44px 0;}
  .section-title{margin-bottom:26px;}
  .step-item{padding:16px;}
  .faq-accordion .accordion-button{font-size:15.5px;padding:15px 16px;}
  .faq-accordion .accordion-body{padding:2px 16px 18px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .cta-panel{padding:32px 20px;}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%;}
  .to-top{right:14px;bottom:16px;}
}

/* roulang page: article */
:root{
  --brand:#E2542A;
  --brand-dark:#B93F1C;
  --brand-soft:#FBE9E2;
  --teal:#0F6E63;
  --teal-dark:#0A4F47;
  --teal-soft:#E3F1EF;
  --accent:#F2C14E;
  --ink:#191A1C;
  --ink-2:#5A6065;
  --ink-3:#8B9096;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --surface-2:#F3EDE6;
  --dark:#121E1C;
  --line:#E6DED4;
  --line-2:#EFE8E0;
  --ok:#2E8B6E;
  --warn:#D98A1F;
  --err:#C0392B;
  --r-xs:6px;
  --r-sm:10px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --sh-1:0 2px 10px rgba(25,26,28,.06);
  --sh-2:0 10px 28px rgba(226,84,42,.14);
  --sh-3:0 18px 40px rgba(18,30,28,.18);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  font-size:17px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--teal);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:.005em;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
li{list-style:none;}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
:focus-visible{outline:2px solid rgba(226,84,42,.5);outline-offset:3px;border-radius:6px;}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:2000;}
.skip-link:focus{left:0;color:#fff;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px;}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:1200px){.container{max-width:1200px;padding-left:32px;padding-right:32px;}}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,248,244,.93);
  backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .28s ease,box-shadow .28s ease,background .28s ease;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 2px 16px rgba(25,26,28,.07);}
.header-inner{display:flex;align-items:center;gap:18px;min-height:84px;transition:min-height .28s ease;}
.site-header.scrolled .header-inner{min-height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:var(--r-md);
  background:var(--brand);
  display:grid;place-items:center;
  box-shadow:0 4px 12px rgba(226,84,42,.28);
  flex:0 0 38px;
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;color:var(--ink);font-weight:700;letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--ink-3);letter-spacing:.14em;}
.nav-panel{flex:1 1 auto;min-width:0;}
.nav-cards{
  display:flex;align-items:center;gap:8px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:8px;
  box-shadow:var(--sh-1);
}
.nav-card{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;
  border-radius:var(--r-md);
  font-size:14.5px;font-weight:600;
  color:var(--ink-2);
  white-space:nowrap;
  transition:background .22s ease,color .22s ease,transform .22s ease;
}
.nav-card svg{width:18px;height:18px;flex:0 0 18px;}
.nav-card:hover{background:var(--brand-soft);color:var(--brand);transform:translateY(-1px);}
.nav-card.active{background:var(--brand-soft);color:var(--brand);}
.nav-card.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:2px;background:var(--brand);
}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--surface);
  flex-direction:column;justify-content:center;align-items:center;gap:4px;
  margin-left:auto;transition:border-color .2s ease;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .25s ease,opacity .25s ease;}
.nav-toggle:hover{border-color:rgba(226,84,42,.4);}
.header-cta{flex:0 0 auto;}
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--brand);color:#fff;
  border-radius:var(--r-sm);
  padding:12px 24px;
  font-size:15.5px;font-weight:600;
  min-height:44px;
  transition:background .22s ease,transform .22s ease,box-shadow .22s ease;
}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-brand:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--teal);
  border:1.5px solid var(--teal);
  border-radius:var(--r-sm);
  padding:10px 22px;font-size:15.5px;font-weight:600;min-height:44px;
  transition:background .22s ease,border-color .22s ease,color .22s ease,transform .22s ease;
}
.btn-ghost:hover{background:rgba(15,110,99,.08);border-color:var(--teal-dark);color:var(--teal-dark);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-weight:600;font-size:15px;background:none;padding:6px 0;
}
.btn-text .arrow{transition:transform .22s ease;}
.btn-text:hover{color:var(--brand-dark);text-decoration:underline;text-underline-offset:4px;}
.btn-text:hover .arrow{transform:translateX(4px);}
@media (min-width:992px){
  .nav-panel{display:block !important;height:auto !important;overflow:visible !important;}
}
@media (max-width:991.98px){
  .nav-toggle{display:flex;}
  .header-inner{flex-wrap:wrap;padding-top:10px;padding-bottom:10px;gap:12px;}
  .site-header.scrolled .header-inner{min-height:auto;}
  .header-cta{order:2;margin-left:auto;}
  .header-cta .btn-brand{padding:10px 18px;font-size:14.5px;}
  .nav-panel{order:3;flex-basis:100%;}
  .nav-panel.collapse:not(.show){display:none;}
  .nav-cards{flex-direction:column;align-items:stretch;gap:6px;margin-top:6px;border-radius:var(--r-lg);}
  .nav-card{padding:12px 14px;border-radius:var(--r-sm);}
  .nav-card.active::before{display:none;}
  .nav-card.active{box-shadow:inset 0 -2px 0 var(--brand);}
  .nav-card:hover{transform:none;}
}
@media (max-width:575.98px){
  .brand-text strong{font-size:15.5px;}
  .brand-text em{font-size:10.5px;letter-spacing:.1em;}
  .header-cta .btn-brand{padding:9px 14px;font-size:14px;min-height:40px;}
  .nav-toggle{width:40px;height:40px;}
}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{padding:20px 0 0;}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-3);}
.breadcrumb-list a{color:var(--ink-2);}
.breadcrumb-list a:hover{color:var(--brand);}
.breadcrumb-list .sep{color:#C8BFB4;}
.breadcrumb-list .current{color:var(--ink);font-weight:600;max-width:min(520px,60vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- 文章布局 ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 308px;
  gap:56px;
  align-items:start;
  padding:36px 0 0;
}
.article-main{min-width:0;max-width:780px;}
.article-head{padding-bottom:26px;border-bottom:1px solid var(--line-2);margin-bottom:30px;}
.article-cat{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--teal-soft);color:var(--teal);
  border-radius:999px;padding:5px 14px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.article-head h1{font-size:38px;line-height:1.32;margin:16px 0 0;color:var(--ink);}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;font-size:13.5px;color:var(--ink-3);}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--accent);display:inline-block;}
.article-meta .meta-strong{color:var(--ink-2);font-weight:600;}

/* ---------- 正文排版 ---------- */
.article-body{font-size:17.5px;line-height:1.92;color:var(--ink);}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.15em;}
.article-body h2{
  position:relative;font-size:26px;line-height:1.45;
  margin:38px 0 16px;padding-left:14px;color:var(--ink);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:3px;
  border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:19px;margin:24px 0 12px;color:var(--ink);}
.article-body h4{font-size:17px;margin:20px 0 10px;color:var(--ink-2);}
.article-body ul,.article-body ol{margin:0 0 1.15em;padding-left:1.4em;}
.article-body ul li{list-style:disc;}
.article-body ol li{list-style:decimal;}
.article-body li{margin:.42em 0;line-height:1.85;}
.article-body img{max-width:100%;height:auto;border-radius:12px;margin:1.7em auto;}
.article-body figure{margin:1.7em 0;}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:.7em;line-height:1.7;}
.article-body blockquote{
  margin:1.7em 0;padding:16px 20px;
  background:var(--brand-soft);
  border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;
  color:#5B4038;
  font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body a{color:var(--teal);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand);}
.article-body strong{font-weight:700;}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.7em 0;
  font-size:15.5px;background:#fff;border-radius:12px;overflow:hidden;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-body th{background:var(--surface-2);font-weight:600;}
.article-body code{background:var(--surface-2);border-radius:6px;padding:2px 6px;font-size:.9em;color:var(--brand-dark);}
.article-body hr{border:none;border-top:1px solid var(--line-2);margin:2.2em 0;}
@media (max-width:767.98px){
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
}
@media (max-width:991.98px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:44px;padding-top:28px;}
  .article-main{max-width:none;}
  .article-head h1{font-size:30px;}
  .article-body{font-size:17px;}
  .article-body h2{font-size:23px;margin-top:32px;}
}
@media (max-width:575.98px){
  .article-head h1{font-size:26px;line-height:1.38;}
  .article-body{font-size:16.5px;line-height:1.88;}
  .article-body h2{font-size:21px;}
}

/* ---------- 空态 ---------- */
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;padding:40px 20px;
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-lg);
}
.empty-icon{
  width:56px;height:56px;border-radius:50%;
  background:rgba(226,84,42,.12);
  display:grid;place-items:center;color:var(--brand);
}
.empty-icon svg{width:26px;height:26px;}
.empty-state p{color:var(--ink-2);font-size:16px;}

/* ---------- 文章底部 ---------- */
.article-foot{margin-top:36px;padding-top:26px;border-top:1px solid var(--line-2);display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center;}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.tag-label{font-size:13px;color:var(--ink-3);margin-right:2px;}
.tag{
  display:inline-flex;align-items:center;
  background:var(--teal-soft);color:var(--teal);
  border-radius:999px;padding:6px 14px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.tag:hover{background:var(--teal);color:#fff;transform:translateY(-1px);}
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:16px;}
.btn-copy{
  display:inline-flex;align-items:center;gap:7px;
  border:1px solid var(--line);background:var(--surface);
  border-radius:var(--r-sm);padding:9px 16px;font-size:14px;font-weight:600;color:var(--ink-2);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.btn-copy:hover{border-color:rgba(226,84,42,.4);color:var(--brand);background:var(--brand-soft);}
.article-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}

/* ---------- 侧栏 ---------- */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;box-shadow:var(--sh-1);}
.side-title{font-size:14px;font-weight:700;color:var(--ink);letter-spacing:.02em;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand);}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{display:block;font-size:14px;color:var(--ink-2);padding:7px 10px;border-radius:var(--r-xs);line-height:1.6;transition:background .2s ease,color .2s ease;}
.toc-list a:hover{background:var(--brand-soft);color:var(--brand);}
.side-cta{background:var(--dark);border:none;color:#fff;box-shadow:var(--sh-3);}
.side-cta .side-title{color:#fff;}
.side-cta .side-title::before{background:var(--accent);}
.side-cta p{font-size:14px;color:#C9D3D0;line-height:1.75;margin-bottom:16px;}
.side-cta .btn-brand{width:100%;}
@media (max-width:991.98px){
  .article-side{position:static;top:auto;}
  .side-cta .btn-brand{width:auto;}
}

/* ---------- 通用板块 ---------- */
.section{padding:68px 0;}
.section-alt{background:var(--surface-2);}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--teal);
  letter-spacing:.06em;margin-bottom:12px;
}
.section-head .eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand);}
.section-head h2{font-size:30px;color:var(--ink);}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:16px;line-height:1.8;}
.section-head .head-row{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;}

/* ---------- 卡片 ---------- */
.card-grid{display:grid;gap:24px;grid-template-columns:repeat(3,minmax(0,1fr));}
.card{
  display:flex;flex-direction:column;height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-1);
  color:inherit;
  transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(226,84,42,.3);color:inherit;}
.card-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.card:hover .card-thumb img{transform:scale(1.03);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:18px;color:var(--ink);line-height:1.5;transition:color .2s ease;}
.card:hover .card-body h3{color:var(--brand);}
.card-body p{font-size:14.5px;color:var(--ink-2);line-height:1.78;}
.card-meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-3);}
@media (max-width:991.98px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}}
@media (max-width:575.98px){.card-grid{grid-template-columns:minmax(0,1fr);gap:16px;}}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:48px;align-items:start;}
.faq-aside h2{font-size:28px;color:var(--ink);}
.faq-aside p{margin-top:12px;color:var(--ink-2);font-size:15.5px;line-height:1.8;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);overflow:hidden;transition:border-color .2s ease,background .2s ease;}
.faq-item:has(.faq-q:not(.collapsed)){border-color:rgba(226,84,42,.35);background:var(--brand-soft);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:17px 20px;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.6;
}
.faq-q:hover{color:var(--brand);}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;}
.faq-q:not(.collapsed) .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{padding:0 20px 20px;font-size:15.5px;color:var(--ink-2);line-height:1.85;}
@media (max-width:991.98px){
  .faq-layout{grid-template-columns:minmax(0,1fr);gap:28px;}
  .faq-aside h2{font-size:24px;}
}

/* ---------- CTA 表单 ---------- */
.cta-section{padding:0 0 72px;}
.cta-panel{
  background:var(--dark);
  border-radius:var(--r-xl);
  padding:52px 48px;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,420px);
  gap:56px;
  box-shadow:var(--sh-3);
}
.cta-copy h2{font-size:30px;color:#fff;line-height:1.4;}
.cta-copy > p{margin-top:14px;color:#C9D3D0;font-size:16px;line-height:1.85;}
.cta-points{display:flex;flex-direction:column;gap:12px;margin-top:26px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);}
.cta-points li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:#DCE5E2;line-height:1.7;}
.cta-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:11px;flex:0 0 6px;}
.cta-form{display:flex;flex-direction:column;gap:16px;}
.form-field{display:flex;flex-direction:column;gap:8px;}
.form-field label{font-size:13.5px;font-weight:600;color:#DCE5E2;letter-spacing:.02em;}
.form-field input,.form-field textarea{
  width:100%;min-height:46px;
  background:#1B2A27;
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-sm);
  padding:12px 14px;
  color:#fff;font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.form-field textarea{min-height:96px;resize:vertical;line-height:1.7;}
.form-field input::placeholder,.form-field textarea::placeholder{color:#7E8C88;}
.form-field input:focus,.form-field textarea:focus{
  outline:none;border-color:var(--brand);background:#20302D;
  box-shadow:0 0 0 3px rgba(226,84,42,.18);
}
.form-field input.is-invalid,.form-field textarea.is-invalid{border-color:var(--err);}
.form-note{font-size:12.5px;color:#93A19D;line-height:1.7;}
.form-status{font-size:14px;color:#9FE0C9;min-height:22px;line-height:1.6;}
.form-status.is-error{color:#F3A79B;}
@media (max-width:991.98px){
  .cta-panel{grid-template-columns:minmax(0,1fr);gap:34px;padding:36px 26px;}
  .cta-copy h2{font-size:24px;}
}
@media (max-width:575.98px){
  .cta-section{padding-bottom:56px;}
  .cta-panel{padding:28px 20px;border-radius:var(--r-lg);}
  .cta-form .btn-brand{width:100%;}
}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;right:22px;bottom:26px;z-index:1040;
  width:46px;height:46px;border-radius:50%;
  background:var(--dark);color:#fff;
  display:grid;place-items:center;
  box-shadow:var(--sh-3);
  opacity:0;pointer-events:none;
  transition:opacity .3s ease,transform .3s ease,background .2s ease;
}
.back-top svg{width:20px;height:20px;}
.back-top.show{opacity:1;pointer-events:auto;}
.back-top:hover{background:var(--brand);transform:translateY(-3px);}
@media (max-width:575.98px){.back-top{right:14px;bottom:18px;width:42px;height:42px;}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#C9D3D0;padding:64px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text em{color:#8FA09B;}
.footer-brand p{font-size:14px;line-height:1.85;color:#9DABA7;max-width:330px;}
.footer-col h4{font-size:14px;color:#fff;font-weight:700;letter-spacing:.03em;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col li{font-size:14px;color:#9DABA7;line-height:1.7;}
.footer-col a{color:#C9D3D0;font-size:14px;position:relative;display:inline-block;padding-bottom:2px;}
.footer-col a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand);transition:width .25s ease;}
.footer-col a:hover{color:#fff;}
.footer-col a:hover::after{width:100%;}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:#8B9995;
}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:575.98px){
  .site-footer{padding-top:44px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}

/* ---------- 通用间距 ---------- */
@media (max-width:991.98px){.section{padding:52px 0;}}
@media (max-width:575.98px){
  .section{padding:44px 0;}
  .section-head h2{font-size:23px;}
  .section-head{margin-bottom:26px;}
}

/* roulang page: category2 */
:root{
  --brand:#E2542A;
  --brand-d:#B93F1C;
  --brand-l:#FBE9E2;
  --accent:#0F6E63;
  --accent-l:#E3F1EF;
  --accent-d:#0A4F47;
  --gold:#F2C14E;
  --ink:#191A1C;
  --ink-2:#5A6065;
  --ink-3:#8B9096;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --surface-2:#F3EDE6;
  --dark:#121E1C;
  --line:#E6DED4;
  --line-soft:#EFE8E0;
  --ok:#2E8B6E;
  --warn:#D98A1F;
  --err:#C0392B;
  --r-btn:10px;
  --r-sm:12px;
  --r-lg:16px;
  --r-xl:20px;
  --sh-1:0 2px 10px rgba(25,26,28,.06);
  --sh-2:0 10px 28px rgba(226,84,42,.14);
  --sh-dark:0 18px 40px rgba(18,30,28,.18);
  --gap-sec:clamp(56px,7vw,96px);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:var(--brand-l);color:var(--brand-d);}

.container{max-width:1200px;width:100%;margin:0 auto;padding-left:24px;padding-right:24px;}
.sec{padding:var(--gap-sec) 0;}
.sec-tight{padding:clamp(40px,5vw,64px) 0;}
.sec-alt{background:var(--surface-2);}

h1{font-size:clamp(26px,3.2vw,40px);line-height:1.3;font-weight:700;letter-spacing:.005em;}
h2{font-size:clamp(22px,2.4vw,31px);line-height:1.35;font-weight:700;}
h3{font-size:18px;line-height:1.5;font-weight:700;}
.lead{font-size:17px;color:var(--ink-2);line-height:1.8;}
.muted{color:var(--ink-3);font-size:14px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--accent);background:var(--accent-l);
  padding:5px 12px;border-radius:999px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold);}
.sec-head{max-width:760px;margin-bottom:clamp(28px,3.4vw,44px);}
.sec-head h2{margin-top:14px;}
.sec-head p{margin-top:12px;color:var(--ink-2);}
.rule-line{display:block;width:48px;height:3px;border-radius:2px;background:var(--brand);margin-top:16px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,248,244,.92);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 4px 18px rgba(25,26,28,.07);}
.header-inner{display:flex;align-items:center;gap:18px;min-height:76px;transition:min-height .25s ease;flex-wrap:wrap;}
.site-header.is-stuck .header-inner{min-height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(140deg,var(--brand),var(--brand-d));display:inline-flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(226,84,42,.28);}
.brand-mark svg{width:20px;height:20px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em;color:var(--ink);}
.brand-text em{font-style:normal;font-size:11px;color:var(--ink-3);letter-spacing:.08em;}
.nav-toggle{display:none;width:44px;height:44px;margin-left:auto;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--surface);flex-direction:column;align-items:center;justify-content:center;gap:5px;padding:0;}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease;}
.nav-panel{flex:1 1 auto;}
.nav-cards{display:flex;flex-wrap:wrap;gap:6px;}
.nav-card{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  padding:9px 13px;border-radius:var(--r-sm);
  font-size:14px;font-weight:500;color:var(--ink-2);
  transition:background-color .2s ease,color .2s ease,transform .2s ease;
}
.nav-card svg{width:18px;height:18px;flex:0 0 auto;}
.nav-card:hover{background:var(--brand-l);color:var(--brand-d);transform:translateY(-1px);}
.nav-card:focus-visible{outline:2px solid rgba(226,84,42,.4);outline-offset:2px;}
.nav-card.active{background:var(--surface);color:var(--brand-d);font-weight:600;box-shadow:var(--sh-1);}
.nav-card.active::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:18px;border-radius:2px;background:var(--brand);}
.nav-cta-mobile{display:none;}
.header-cta{flex:0 0 auto;}

/* ---------- Buttons ---------- */
.btn-brand,.btn-ghost,.btn-link-arrow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;border-radius:var(--r-btn);
  padding:12px 24px;min-height:44px;border:1.5px solid transparent;
  transition:background-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  cursor:pointer;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(226,84,42,.24);}
.btn-brand:hover{background:var(--brand-d);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(226,84,42,.28);}
.btn-brand:active{transform:translateY(0);}
.btn-brand:focus-visible{outline:2px solid rgba(226,84,42,.4);outline-offset:2px;}
.btn-ghost{background:transparent;border-color:var(--accent);color:var(--accent);}
.btn-ghost:hover{background:rgba(15,110,99,.08);border-color:var(--accent-d);color:var(--accent-d);}
.btn-ghost:focus-visible{outline:2px solid rgba(15,110,99,.32);outline-offset:2px;}
.btn-on-dark{background:#fff;color:var(--dark);}
.btn-on-dark:hover{background:var(--brand-l);color:var(--brand-d);transform:translateY(-2px);}
.btn-ghost-on-dark{background:transparent;border-color:rgba(255,255,255,.4);color:#fff;}
.btn-ghost-on-dark:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff;}
.btn-link-arrow{background:none;border:0;padding:6px 0;color:var(--brand);min-height:auto;}
.btn-link-arrow svg{width:16px;height:16px;transition:transform .2s ease;}
.btn-link-arrow:hover{color:var(--brand-d);text-decoration:underline;}
.btn-link-arrow:hover svg{transform:translateX(4px);}
.btn-brand[disabled],.btn-brand.disabled{background:var(--line);color:var(--ink-3);box-shadow:none;pointer-events:none;}

/* ---------- Breadcrumb ---------- */
.crumb-bar{padding:16px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-3);}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--line);}
.crumb .current{color:var(--brand-d);font-weight:600;}

/* ---------- Category hero ---------- */
.cat-hero-wrap{padding:20px 0 0;}
.cat-hero{
  position:relative;border-radius:var(--r-xl);overflow:hidden;
  padding:clamp(30px,4vw,48px);
  color:#fff;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  min-height:190px;
  display:flex;align-items:center;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(104deg,rgba(18,30,28,.9) 0%,rgba(18,30,28,.68) 52%,rgba(226,84,42,.48) 100%);
}
.cat-hero-inner{position:relative;z-index:1;max-width:820px;}
.cat-hero-inner .eyebrow{background:rgba(255,255,255,.14);color:#fff;}
.cat-hero-inner h1{color:#fff;margin-top:16px;}
.cat-hero-inner .lead{color:rgba(255,255,255,.86);margin-top:12px;max-width:660px;font-size:16.5px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.hero-tags span{
  font-size:13px;color:rgba(255,255,255,.92);
  border:1px solid rgba(255,255,255,.34);border-radius:999px;
  padding:5px 13px;
}

/* ---------- Spec strip ---------- */
.spec-strip{
  display:grid;grid-template-columns:repeat(3,1fr);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);margin-top:20px;overflow:hidden;
}
.spec-item{padding:20px 24px;border-right:1px solid var(--line-soft);}
.spec-item:last-child{border-right:0;}
.spec-item strong{display:block;font-size:24px;font-weight:700;color:var(--brand);line-height:1.2;}
.spec-item span{display:block;font-size:13.5px;color:var(--ink-3);margin-top:6px;}

/* ---------- Tag strip ---------- */
.tag-strip-wrap{background:var(--surface);border-bottom:1px solid var(--line-soft);}
.tag-strip{display:flex;gap:10px;overflow-x:auto;padding:16px 0;scrollbar-width:thin;}
.tag-strip::-webkit-scrollbar{height:5px;}
.tag-strip::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px;}
.tag-chip{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;
  padding:9px 16px;border-radius:999px;font-size:14px;font-weight:500;
  background:var(--surface-2);color:var(--ink-2);border:1px solid transparent;
  transition:all .2s ease;white-space:nowrap;
}
.tag-chip:hover{background:var(--brand-l);color:var(--brand-d);border-color:rgba(226,84,42,.24);}
.tag-chip.is-key{background:var(--accent-l);color:var(--accent-d);}
.tag-chip.is-key:hover{background:var(--accent);color:#fff;border-color:var(--accent);}
.tag-chip i{width:6px;height:6px;border-radius:50%;background:var(--gold);display:inline-block;font-style:normal;}

/* ---------- Compare columns ---------- */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.compare-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(22px,2.6vw,32px);box-shadow:var(--sh-1);height:100%;
  display:flex;flex-direction:column;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.compare-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:rgba(226,84,42,.3);}
.compare-head{display:flex;align-items:center;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line-soft);margin-bottom:18px;}
.compare-head .ico{width:40px;height:40px;border-radius:var(--r-sm);display:inline-flex;align-items:center;justify-content:center;background:var(--brand-l);color:var(--brand-d);flex:0 0 auto;}
.compare-head .ico svg{width:20px;height:20px;}
.compare-card.alt .compare-head .ico{background:var(--accent-l);color:var(--accent-d);}
.compare-head h3{font-size:18px;}
.compare-head p{margin-top:3px;}
.list-check{display:flex;flex-direction:column;gap:14px;}
.list-check li{display:flex;gap:11px;font-size:15.5px;color:var(--ink-2);line-height:1.7;}
.list-check li svg{width:18px;height:18px;flex:0 0 auto;margin-top:4px;color:var(--accent);}
.list-check li strong{color:var(--ink);font-weight:600;}
.compare-card .footnote{margin-top:auto;padding-top:18px;font-size:13.5px;color:var(--ink-3);}

/* ---------- Split media ---------- */
.split{display:grid;grid-template-columns:6fr 6fr;gap:clamp(24px,3vw,48px);align-items:center;}
.split.rev .split-media{order:2;}
.split-media{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);background:var(--surface-2);}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.split-body h2{margin-top:14px;}
.split-body p{margin-top:14px;color:var(--ink-2);}
.step-mini{display:flex;flex-direction:column;gap:12px;margin-top:22px;}
.step-mini li{display:flex;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);padding:14px 16px;transition:transform .2s ease,box-shadow .2s ease;}
.step-mini li:hover{transform:translateX(3px);box-shadow:var(--sh-1);}
.step-mini .num{
  flex:0 0 auto;width:28px;height:28px;border-radius:8px;background:var(--brand-l);color:var(--brand-d);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;
}
.step-mini h4{font-size:15.5px;font-weight:600;}
.step-mini p{font-size:14px;color:var(--ink-3);margin-top:2px;line-height:1.65;}

/* ---------- Channel cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.media-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.media-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(226,84,42,.3);}
.media-card .thumb{position:relative;overflow:hidden;}
.media-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease;}
.media-card:hover .thumb img{transform:scale(1.03);}
.media-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.badge-cat{
  align-self:flex-start;font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--accent-d);background:var(--accent-l);border-radius:999px;padding:4px 11px;
}
.media-card h3{margin-top:12px;transition:color .2s ease;}
.media-card:hover h3{color:var(--brand-d);}
.media-card p{margin-top:10px;font-size:14.5px;color:var(--ink-2);line-height:1.75;}
.meta-row{margin-top:auto;padding-top:16px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-3);}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--line);}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:280px 1fr;gap:clamp(24px,3vw,56px);align-items:start;}
.faq-aside h2{margin-top:14px;}
.faq-aside p{margin-top:12px;color:var(--ink-2);font-size:15px;}
.faq-accordion .accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);
  margin-bottom:12px;overflow:hidden;
}
.faq-accordion .accordion-item:last-child{margin-bottom:0;}
.faq-accordion .accordion-button{
  font-size:16.5px;font-weight:600;color:var(--ink);
  padding:18px 22px;background:var(--surface);box-shadow:none;border:0;
  display:flex;align-items:center;gap:14px;
}
.faq-accordion .accordion-button:not(.collapsed){
  background:var(--brand-l);color:var(--brand-d);
  box-shadow:inset 3px 0 0 var(--brand);
}
.faq-accordion .accordion-button::after{
  background-image:none;content:"+";font-size:20px;font-weight:600;line-height:1;
  color:var(--brand);margin-left:auto;width:auto;height:auto;display:inline-flex;align-items:center;transform:none;transition:transform .2s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after{content:"–";transform:none;}
.faq-accordion .accordion-button:focus{outline:2px solid rgba(226,84,42,.35);outline-offset:-2px;box-shadow:none;}
.faq-accordion .accordion-body{padding:6px 22px 22px;font-size:15.5px;color:var(--ink-2);line-height:1.8;}

/* ---------- CTA panel ---------- */
.cta-panel{
  background:var(--dark);color:#fff;border-radius:var(--r-xl);
  padding:clamp(30px,4vw,52px);box-shadow:var(--sh-dark);
  display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(28px,3.4vw,52px);
}
.cta-panel h2{color:#fff;margin-top:14px;}
.cta-panel .lead{color:rgba(255,255,255,.72);margin-top:14px;font-size:16px;}
.cta-list{display:flex;flex-direction:column;gap:12px;margin-top:24px;}
.cta-list li{display:flex;gap:10px;font-size:14.5px;color:rgba(255,255,255,.82);}
.cta-list svg{width:16px;height:16px;flex:0 0 auto;margin-top:5px;color:var(--gold);}
.cta-panel .eyebrow{background:rgba(255,255,255,.12);color:#fff;}
.form-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-lg);padding:clamp(20px,2.4vw,28px);}
.form-card .form-label{font-size:14px;color:rgba(255,255,255,.8);margin-bottom:8px;}
.form-card .form-control{
  height:46px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.94);color:var(--ink);font-size:15px;padding:0 14px;
}
.form-card textarea.form-control{height:auto;min-height:96px;padding:12px 14px;resize:vertical;}
.form-card .form-control:focus{
  border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 3px rgba(226,84,42,.18);outline:none;
}
.form-card .form-control::placeholder{color:var(--ink-3);}
.form-note{font-size:12.5px;color:rgba(255,255,255,.58);margin-top:12px;line-height:1.7;}
.form-status{font-size:14px;margin-top:14px;min-height:22px;}
.form-status.ok{color:#8CE0C2;}
.form-status.err{color:#F5A28C;}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:1040;
  width:46px;height:46px;border-radius:50%;border:0;
  background:var(--dark);color:#fff;display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-dark);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top svg{width:18px;height:18px;}
.to-top:hover{background:var(--brand);}

/* ---------- Footer ---------- */
.site-footer{background:var(--dark);color:#C9D3D0;padding:clamp(48px,6vw,72px) 0 28px;margin-top:var(--gap-sec);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.02em;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li{font-size:14px;line-height:1.7;}
.footer-col a{font-size:14px;color:#C9D3D0;border-bottom:2px solid transparent;padding-bottom:1px;}
.footer-col a:hover{color:#fff;border-bottom-color:var(--brand);}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text em{color:rgba(255,255,255,.5);}
.footer-brand p{font-size:14px;line-height:1.8;color:#C9D3D0;max-width:330px;}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .container{padding-left:24px;padding-right:24px;}
}
@media (max-width:991.98px){
  .site-header.is-stuck .header-inner{min-height:68px;}
  .nav-toggle{display:flex;}
  .header-cta{display:none;}
  .nav-panel{
    flex:1 0 100%;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:10px;margin-top:12px;
  }
  .nav-panel.collapse:not(.show){display:none;}
  .nav-cards{flex-direction:column;gap:4px;}
  .nav-card{padding:12px 14px;font-size:15px;}
  .nav-card.active::before{left:auto;top:auto;bottom:0;transform:none;width:auto;height:2px;left:14px;right:14px;}
  .nav-card.active{background:var(--brand-l);}
  .nav-cta-mobile{display:inline-flex;width:100%;margin-top:10px;}
  .header-cta-mobile{display:block;}
  .spec-strip{grid-template-columns:1fr;}
  .spec-item{border-right:0;border-bottom:1px solid var(--line-soft);}
  .spec-item:last-child{border-bottom:0;}
  .compare-grid{grid-template-columns:1fr;}
  .split{grid-template-columns:1fr;}
  .split.rev .split-media{order:0;}
  .split-media img{aspect-ratio:16/10;}
  .card-grid{grid-template-columns:1fr 1fr;}
  .faq-layout{grid-template-columns:1fr;}
  .cta-panel{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .container{padding-left:16px;padding-right:16px;}
  .header-inner{min-height:68px;gap:12px;}
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cat-hero{border-radius:var(--r-lg);}
  .btn-brand,.btn-ghost{width:100%;}
  .hero-actions{display:flex;flex-direction:column;gap:12px;}
  .sec{padding:56px 0;}
  .to-top{right:16px;bottom:18px;}
}
@media (min-width:992px){
  .nav-panel.collapse{display:block !important;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:6px;}
  .nav-cta-mobile{display:none;}
}

/* roulang page: category3 */
:root{
  --brand:#E2542A;
  --brand-dark:#B93F1C;
  --brand-light:#FBE9E2;
  --teal:#0F6E63;
  --teal-dark:#0A4F47;
  --teal-light:#E3F1EF;
  --yellow:#F2C14E;
  --ink:#191A1C;
  --ink-2:#5A6065;
  --ink-3:#8B9096;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --surface-2:#F3EDE6;
  --dark:#121E1C;
  --line:#E6DED4;
  --line-soft:#EFE8E0;
  --r-btn:10px;
  --r-sm:12px;
  --r-md:16px;
  --r-lg:20px;
  --sh-card:0 2px 10px rgba(25,26,28,.06);
  --sh-hover:0 10px 28px rgba(226,84,42,.14);
  --sh-dark:0 18px 40px rgba(18,30,28,.18);
  --gutter:24px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  letter-spacing:.01em;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid rgba(226,84,42,.45);
  outline-offset:2px;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;letter-spacing:.005em;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;cursor:pointer;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 16px;
}
@media (min-width:768px){.container{padding:0 24px;}}
@media (min-width:1200px){.container{padding:0 32px;}}

/* ---------- 按钮 ---------- */
.btn-brand,.btn-line,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-weight:600;font-size:15px;
  padding:12px 24px;min-height:44px;border:1.5px solid transparent;
  transition:all .22s ease;white-space:nowrap;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(226,84,42,.22);}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(226,84,42,.28);}
.btn-brand:active{transform:translateY(0);}
.btn-line{background:transparent;color:var(--teal);border-color:var(--teal);}
.btn-line:hover{background:rgba(15,110,99,.08);border-color:var(--teal-dark);color:var(--teal-dark);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--brand);padding:10px 4px;border:none;min-height:auto;}
.btn-ghost .arw{transition:transform .22s ease;}
.btn-ghost:hover{color:var(--brand-dark);text-decoration:underline;}
.btn-ghost:hover .arw{transform:translateX(4px);}
.btn-brand.wide,.btn-line.wide{width:100%;}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,248,244,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:padding .25s ease,box-shadow .25s ease,border-color .25s ease,background-color .25s ease;
  padding:10px 0;
}
.site-header.scrolled{
  padding:4px 0;
  border-bottom-color:var(--line);
  box-shadow:0 4px 18px rgba(25,26,28,.07);
}
.header-inner{display:flex;align-items:center;gap:16px;flex-wrap:nowrap;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),#F0794E);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(226,84,42,.28);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text strong{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.02em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--ink-3);letter-spacing:.06em;}
.nav-toggle{
  margin-left:auto;width:44px;height:44px;border-radius:12px;
  background:var(--surface);border:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:.2s;}
.nav-toggle:not(.collapsed) span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle:not(.collapsed) span:nth-child(2){opacity:0;}
.nav-toggle:not(.collapsed) span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-panel{flex:1 1 auto;}
.nav-cards{
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-card);
  padding:10px;
}
.nav-card{
  position:relative;display:flex;align-items:center;justify-content:center;gap:7px;
  padding:10px 8px;border-radius:var(--r-sm);
  background:var(--surface-2);color:var(--ink-2);
  font-size:14px;font-weight:600;text-align:center;
  transition:all .22s ease;
}
.nav-card svg{width:18px;height:18px;flex:0 0 auto;color:var(--teal);transition:color .22s ease;}
.nav-card:hover{background:var(--brand-light);color:var(--brand-dark);transform:translateY(-1px);}
.nav-card:hover svg{color:var(--brand);}
.nav-card.active{background:var(--brand-light);color:var(--brand-dark);}
.nav-card.active svg{color:var(--brand);}
.nav-card.active::before{
  content:"";position:absolute;left:0;top:22%;bottom:22%;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}
.header-cta{flex:0 0 auto;}
.header-cta .btn-brand{padding:11px 20px;font-size:14px;}
@media (max-width:1199px){
  .nav-cards{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:991px){
  .nav-toggle{display:flex;}
  .nav-panel{
    flex-basis:100%;order:3;margin-top:12px;
  }
  .nav-panel.collapse:not(.show){display:none;}
  .nav-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;}
  .nav-card{justify-content:flex-start;text-align:left;padding:12px 12px;}
  .nav-card.active::before{left:8%;right:8%;top:auto;bottom:0;width:auto;height:2px;border-radius:3px 3px 0 0;}
  .header-cta{margin-left:auto;}
}
@media (min-width:992px){
  .nav-toggle{display:none;}
  .nav-panel.collapse{display:block !important;height:auto !important;}
}
@media (max-width:767px){
  .brand-text em{display:none;}
  .header-cta{display:none;}
  .nav-toggle{margin-left:auto;}
}
@media (max-width:575px){
  .nav-cards{grid-template-columns:1fr;}
}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:var(--surface-2);border-bottom:1px solid var(--line-soft);}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  font-size:13px;color:var(--ink-3);padding:11px 0;
}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#C7BCAE;}
.crumb .now{color:var(--brand);font-weight:600;}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,rgba(18,30,28,.78),rgba(18,30,28,.46)),
             url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  color:#fff;
  padding:56px 0 60px;
}
.cat-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:rgba(255,255,255,.12);
}
.cat-hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:#FFD9C9;background:rgba(226,84,42,.28);
  border:1px solid rgba(255,255,255,.22);
  padding:6px 12px;border-radius:999px;margin-bottom:16px;
}
.cat-hero h1{
  font-size:34px;line-height:1.28;color:#fff;max-width:780px;
}
.cat-hero h1 span{color:#FFC8B2;}
.cat-hero .lead{
  margin-top:14px;max-width:660px;color:rgba(255,255,255,.86);
  font-size:16px;line-height:1.85;
}
.cat-hero .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.cat-hero .hero-tags span{
  font-size:13px;padding:6px 12px;border-radius:999px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:#fff;
}
@media (min-width:992px){
  .cat-hero{padding:72px 0 76px;}
  .cat-hero h1{font-size:42px;}
  .cat-hero .lead{font-size:17px;}
}
@media (max-width:575px){
  .cat-hero{padding:40px 0 44px;}
  .cat-hero h1{font-size:26px;}
}

/* ---------- 板块通用 ---------- */
.section{padding:56px 0;}
.section.tint{background:var(--surface-2);}
.section.plain{background:var(--bg);}
.section-head{max-width:760px;margin-bottom:34px;}
.eyebrow-line{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--teal);background:var(--teal-light);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.section-head h2{font-size:26px;line-height:1.35;}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:16px;}
.tag-pill{
  display:inline-flex;align-items:center;
  font-size:13px;font-weight:600;padding:4px 11px;border-radius:999px;
  background:var(--teal-light);color:var(--teal-dark);letter-spacing:.02em;
}
.tag-pill.orange{background:var(--brand-light);color:var(--brand-dark);}
@media (min-width:992px){
  .section{padding:88px 0;}
  .section-head h2{font-size:32px;}
  .section-head{margin-bottom:48px;}
}

/* ---------- 竖向训练时间轴 ---------- */
.timeline{position:relative;padding-left:34px;}
.timeline::before{
  content:"";position:absolute;left:11px;top:10px;bottom:10px;width:2px;
  background:linear-gradient(180deg,var(--brand) 0%,var(--teal) 100%);
  opacity:.28;border-radius:2px;
}
.tl-item{position:relative;margin-bottom:22px;}
.tl-item:last-child{margin-bottom:0;}
.tl-node{
  position:absolute;left:-34px;top:22px;
  width:24px;height:24px;border-radius:50%;
  background:var(--surface);border:2px solid var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:11px;font-weight:700;color:var(--brand-dark);
  box-shadow:0 0 0 4px rgba(251,248,244,.9);
}
.tl-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-card);
  padding:22px 22px 20px;transition:all .25s ease;
}
.tl-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(226,84,42,.3);}
.tl-card h3{font-size:19px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tl-card h3 .sort{
  font-size:13px;font-weight:700;color:#fff;background:var(--brand);
  border-radius:8px;padding:2px 9px;letter-spacing:.02em;
}
.tl-card p{margin-top:10px;color:var(--ink-2);font-size:15.5px;line-height:1.8;}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;align-items:center;}
.tl-meta .dur{font-size:13px;color:var(--ink-3);}
@media (min-width:768px){
  .timeline{padding-left:52px;}
  .timeline::before{left:15px;}
  .tl-node{left:-52px;width:30px;height:30px;font-size:12px;}
  .tl-card{padding:26px 28px;}
}
.tl-foot{
  margin-top:26px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;
  padding:18px 22px;border-radius:var(--r-md);
  background:var(--teal-light);border:1px solid rgba(15,110,99,.16);
  font-size:15px;color:var(--teal-dark);
}

/* ---------- 图文模块 ---------- */
.media-row{display:grid;gap:26px;align-items:center;}
.media-row + .media-row{margin-top:34px;}
.media-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-card);background:var(--surface-2);
  aspect-ratio:16/10;
}
.media-figure img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.media-row:hover .media-figure img{transform:scale(1.03);}
.media-body h3{font-size:20px;}
.media-body p{margin-top:12px;color:var(--ink-2);font-size:16px;}
.check-list{margin-top:16px;}
.check-list li{
  position:relative;padding-left:26px;margin-bottom:10px;font-size:15.5px;color:var(--ink-2);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(-45deg);border-radius:1px;
}
@media (min-width:992px){
  .media-row{grid-template-columns:7fr 5fr;gap:52px;}
  .media-row.flip{grid-template-columns:5fr 7fr;}
  .media-row.flip .media-figure{order:2;}
  .media-row.flip .media-body{order:1;}
}

/* ---------- 数据条 ---------- */
.data-strip{
  display:grid;gap:16px;
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.data-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 20px;box-shadow:var(--sh-card);transition:all .25s ease;
}
.data-item:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.data-item .num{
  font-size:30px;font-weight:700;color:var(--brand);line-height:1.1;letter-spacing:.01em;
}
.data-item .num small{font-size:15px;font-weight:600;color:var(--brand-dark);margin-left:4px;}
.data-item .lbl{margin-top:8px;font-size:14px;color:var(--ink-2);}
@media (min-width:768px){.data-strip{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}}

/* ---------- 人群卡 ---------- */
.fit-grid{display:grid;gap:18px;grid-template-columns:1fr;}
.fit-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px 22px;box-shadow:var(--sh-card);transition:all .25s ease;height:100%;
}
.fit-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(226,84,42,.3);}
.fit-card .ico{
  width:42px;height:42px;border-radius:12px;background:var(--brand-light);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.fit-card .ico svg{width:22px;height:22px;color:var(--brand);}
.fit-card h3{font-size:18px;}
.fit-card p{margin-top:10px;color:var(--ink-2);font-size:15.5px;}
@media (min-width:768px){.fit-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}}
@media (min-width:1200px){.fit-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;gap:26px;}
.faq-aside h2{font-size:26px;}
.faq-aside p{margin-top:12px;color:var(--ink-2);font-size:15.5px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);
  overflow:hidden;transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item.open{border-color:rgba(226,84,42,.35);box-shadow:var(--sh-card);}
.faq-q{
  width:100%;background:none;border:none;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:17px 20px;font-size:16.5px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand-dark);}
.faq-q .sign{
  flex:0 0 auto;width:22px;height:22px;position:relative;
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform .25s ease,opacity .25s ease;
}
.faq-q .sign::before{left:3px;right:3px;top:10px;height:2px;}
.faq-q .sign::after{top:3px;bottom:3px;left:10px;width:2px;}
.faq-item.open .faq-q .sign::after{transform:scaleY(0);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .3s ease;
  border-left:3px solid transparent;
}
.faq-item.open .faq-a{
  max-height:420px;background:var(--brand-light);
  border-left-color:var(--brand);
}
.faq-a .inner{padding:4px 20px 20px;color:var(--ink-2);font-size:15.5px;line-height:1.85;}
@media (min-width:992px){
  .faq-layout{grid-template-columns:300px 1fr;gap:48px;}
  .faq-aside{position:sticky;top:110px;align-self:start;}
  .faq-aside h2{font-size:30px;}
}

/* ---------- CTA 面板 ---------- */
.cta-panel{
  background:var(--dark);color:#fff;border-radius:var(--r-lg);
  box-shadow:var(--sh-dark);padding:34px 24px;position:relative;overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;
  border-radius:50%;background:radial-gradient(circle,rgba(226,84,42,.32),transparent 68%);
}
.cta-panel h2{font-size:26px;color:#fff;position:relative;}
.cta-panel .sub{margin-top:12px;color:rgba(255,255,255,.78);font-size:15.5px;position:relative;}
.cta-panel hr{border-color:rgba(255,255,255,.12);margin:26px 0;position:relative;}
.form-grid{display:grid;gap:16px;position:relative;}
.field label{display:block;font-size:13.5px;color:rgba(255,255,255,.8);margin-bottom:7px;font-weight:600;}
.field input,.field textarea{
  width:100%;height:46px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);
  color:#fff;padding:0 14px;font-size:15px;transition:all .2s ease;
}
.field textarea{height:88px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.42);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(226,84,42,.22);background:rgba(255,255,255,.1);
}
.form-note{font-size:13px;color:rgba(255,255,255,.6);position:relative;}
.form-status{font-size:14px;margin-top:2px;position:relative;display:none;}
.form-status.ok{display:block;color:#8FE3C6;}
.form-status.err{display:block;color:#FFB4A4;}
.cta-side{position:relative;}
.cta-side ul{margin-top:20px;}
.cta-side li{
  position:relative;padding-left:24px;color:rgba(255,255,255,.82);
  font-size:15px;margin-bottom:10px;
}
.cta-side li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;
  background:var(--yellow);opacity:.85;
}
@media (min-width:992px){
  .cta-panel{padding:56px 56px;}
  .cta-panel h2{font-size:32px;}
  .cta-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start;}
  .form-grid{grid-template-columns:1fr 1fr;gap:18px;}
  .form-grid .full{grid-column:1 / -1;}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#C9D3D0;padding:56px 0 0;margin-top:0;}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr;}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.04em;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;font-size:14px;line-height:1.7;}
.footer-col ul li a{color:#C9D3D0;font-size:14px;border-bottom:2px solid transparent;padding-bottom:2px;}
.footer-col ul li a:hover{color:#fff;border-bottom-color:var(--brand);}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text em{color:rgba(255,255,255,.55);}
.footer-brand p{margin-top:16px;font-size:14px;color:#A9B6B2;line-height:1.85;max-width:340px;}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:13px;color:#8A9793;
}
@media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:36px;}}
@media (min-width:992px){
  .site-footer{padding-top:72px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;}
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:18px;bottom:18px;width:46px;height:46px;border-radius:50%;
  background:var(--dark);color:#fff;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.14);box-shadow:var(--sh-dark);
  opacity:0;visibility:hidden;transition:all .25s ease;z-index:1040;
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{background:var(--brand);transform:translateY(-3px);}
.to-top svg{width:18px;height:18px;}

/* roulang page: category4 */
:root{
  --brand:#E2542A;
  --brand-dark:#B93F1C;
  --brand-soft:#FBE9E2;
  --teal:#0F6E63;
  --teal-dark:#0A4F47;
  --teal-soft:#E3F1EF;
  --accent:#F2C14E;
  --ink:#191A1C;
  --ink-2:#5A6065;
  --ink-3:#8B9096;
  --paper:#FBF8F4;
  --surface:#FFFFFF;
  --surface-2:#F3EDE6;
  --panel:#121E1C;
  --line:#E6DED4;
  --line-soft:#EFE8E0;
  --success:#2E8B6E;
  --radius-btn:10px;
  --radius-sm:12px;
  --radius-md:16px;
  --radius-lg:20px;
  --shadow-card:0 2px 10px rgba(25,26,28,.06);
  --shadow-hover:0 10px 28px rgba(226,84,42,.14);
  --shadow-panel:0 18px 40px rgba(18,30,28,.18);
  --gap-section:96px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:0;line-height:1.35;}
p{margin:0 0 1em;}
button{font-family:inherit;}
:focus-visible{outline:2px solid rgba(226,84,42,.42);outline-offset:2px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 16px;
}
@media (min-width:768px){ .container{padding:0 24px;} }
@media (min-width:1200px){ .container{padding:0 32px;} }

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,248,244,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line-soft);
  transition:box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-stuck{
  border-bottom:1px solid var(--line);
  box-shadow:0 6px 18px rgba(25,26,28,.07);
}
.header-inner{
  display:flex;align-items:center;gap:18px;
  min-height:80px;
  transition:min-height .25s ease;
}
.site-header.is-stuck .header-inner{min-height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(226,84,42,.28);
}
.brand-mark svg{width:22px;height:22px;display:block;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:18px;font-weight:700;letter-spacing:.01em;color:var(--ink);}
.brand-text em{font-style:normal;font-size:11px;color:var(--ink-3);letter-spacing:.14em;}

.nav-panel{flex:1 1 auto;min-width:0;}
.nav-cards{
  display:flex;align-items:center;gap:8px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:8px 10px;
  box-shadow:var(--shadow-card);
}
.nav-card{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;
  border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;color:var(--ink-2);
  background:transparent;
  white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,transform .2s ease;
}
.nav-card svg{width:18px;height:18px;flex:0 0 18px;}
.nav-card:hover{
  background:var(--brand-soft);color:var(--brand);
  transform:translateY(-1px);
}
.nav-card.active{background:var(--brand-soft);color:var(--brand-dark);}
.nav-card.active::before{
  content:"";position:absolute;left:-3px;top:20%;bottom:20%;
  width:3px;border-radius:3px;background:var(--brand);
}
.header-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;
  margin-left:auto;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  padding:0;
  position:relative;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ============ buttons ============ */
.btn-brand,.btn-ghost,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;
  padding:12px 24px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-brand{background:var(--brand);color:#fff;}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(185,63,28,.26);}
.btn-brand:active{transform:translateY(0);box-shadow:none;}
.btn-line{background:transparent;border-color:var(--teal);color:var(--teal);}
.btn-line:hover{background:rgba(15,110,99,.08);border-color:var(--teal-dark);color:var(--teal-dark);}
.btn-line:active{transform:translateY(1px);}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:rgba(226,84,42,.4);color:var(--brand);transform:translateY(-2px);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-weight:600;font-size:15px;
}
.btn-text i{transition:transform .2s ease;}
.btn-text:hover{color:var(--brand-dark);text-decoration:underline;text-underline-offset:4px;}
.btn-text:hover i{transform:translateX(4px);}
.btn-brand[disabled],.btn-brand.disabled{background:var(--line);color:var(--ink-3);box-shadow:none;pointer-events:none;}

/* ============ breadcrumb ============ */
.crumb-bar{padding:16px 0 0;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);
}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--line);}
.crumb .now{color:var(--brand-dark);font-weight:600;}

/* ============ hero ============ */
.cat-hero{
  position:relative;
  margin-top:20px;
  border-radius:var(--radius-lg);
  overflow:hidden;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  box-shadow:var(--shadow-panel);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(18,30,28,.88) 0%,rgba(18,30,28,.62) 55%,rgba(15,110,99,.4) 100%);
}
.cat-hero-inner{
  position:relative;z-index:2;
  padding:44px 28px;
  max-width:760px;
}
.cat-hero .badge-line{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.24);
  color:#fff;font-size:13px;letter-spacing:.02em;
}
.cat-hero h1{
  margin:16px 0 12px;
  font-size:34px;
  color:#fff;
  letter-spacing:.005em;
}
.cat-hero p{
  color:rgba(255,255,255,.86);
  font-size:16px;
  margin:0;
  max-width:620px;
}
.hero-dots{display:flex;gap:6px;margin-top:18px;}
.hero-dots span{width:26px;height:4px;border-radius:4px;background:rgba(255,255,255,.35);}
.hero-dots span:first-child{background:var(--accent);width:40px;}

/* ============ sections ============ */
.section{padding:var(--gap-section) 0 0;}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.02em;color:var(--teal);
  background:var(--teal-soft);
  padding:6px 12px;border-radius:999px;
  margin-bottom:14px;
}
.section-head h2{font-size:30px;margin-bottom:12px;}
.section-head p{color:var(--ink-2);margin:0;font-size:16px;}

/* ============ 图文大卡 ============ */
.feature-card{
  display:grid;
  grid-template-columns:1fr;
  gap:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.feature-media{
  position:relative;
  min-height:260px;
  background:var(--surface-2);
}
.feature-media img{
  width:100%;height:100%;
  object-fit:cover;
  aspect-ratio:16/11;
}
.feature-body{padding:30px 26px;}
.feature-body h2{font-size:26px;margin-bottom:14px;}
.feature-body p{color:var(--ink-2);font-size:16px;}
.feature-list{list-style:none;padding:0;margin:18px 0 0;}
.feature-list li{
  display:flex;gap:10px;align-items:flex-start;
  padding:10px 0;
  border-top:1px solid var(--line-soft);
  font-size:15px;color:var(--ink-2);
}
.feature-list li:first-child{border-top:none;}
.feature-list i{color:var(--brand);margin-top:6px;font-size:13px;}

/* ============ 数据条 ============ */
.stat-strip{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
  margin-top:24px;
}
.stat-item{
  display:flex;flex-direction:column;gap:6px;
  background:var(--surface);
  border:1px solid var(--line);
  border-left:3px solid var(--brand);
  border-radius:var(--radius-sm);
  padding:20px 22px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.stat-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(226,84,42,.35);}
.stat-num{
  font-size:34px;font-weight:700;color:var(--brand);
  line-height:1.1;letter-spacing:.01em;
}
.stat-num small{font-size:16px;font-weight:600;margin-left:2px;color:var(--brand-dark);}
.stat-label{font-size:14px;color:var(--ink-2);}
.stat-note{font-size:13px;color:var(--ink-3);border-top:1px dashed var(--line);padding-top:8px;margin-top:4px;}

/* ============ 指标卡片网格 ============ */
.metric-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
.metric-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:22px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  height:100%;
}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(226,84,42,.3);}
.metric-top{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.metric-ico{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  background:var(--teal-soft);color:var(--teal);
  display:flex;align-items:center;justify-content:center;font-size:16px;
}
.metric-card h3{font-size:18px;}
.metric-card p{color:var(--ink-2);font-size:15px;line-height:1.75;margin:0 0 12px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:999px;
  font-size:13px;letter-spacing:.02em;
  background:var(--teal-soft);color:var(--teal-dark);
}
.tag-warm{background:var(--brand-soft);color:var(--brand-dark);}
.tag-neutral{background:var(--surface-2);color:var(--ink-2);}

/* ============ 对比块 ============ */
.compare{
  display:grid;grid-template-columns:1fr;gap:20px;
  margin-top:8px;
}
.compare-col{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:24px;
}
.compare-col.is-dark{
  background:var(--panel);border-color:rgba(255,255,255,.12);color:#fff;
}
.compare-col.is-dark p,.compare-col.is-dark li{color:rgba(255,255,255,.76);}
.compare-col h3{font-size:19px;margin-bottom:6px;}
.compare-col .sub{font-size:13px;color:var(--ink-3);margin-bottom:16px;display:block;}
.compare-col.is-dark .sub{color:rgba(255,255,255,.55);}
.compare-col ul{list-style:none;padding:0;margin:0;}
.compare-col li{
  display:flex;gap:10px;align-items:flex-start;
  padding:11px 0;border-top:1px solid var(--line-soft);
  font-size:15px;color:var(--ink-2);line-height:1.7;
}
.compare-col.is-dark li{border-top-color:rgba(255,255,255,.12);}
.compare-col li:first-child{border-top:none;padding-top:0;}
.compare-col li i{color:var(--accent);margin-top:6px;font-size:12px;}

/* ============ FAQ ============ */
.faq-wrap{
  display:grid;grid-template-columns:1fr;gap:24px;
}
.faq-side h2{font-size:26px;margin-bottom:10px;}
.faq-side p{color:var(--ink-2);font-size:15px;max-width:280px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  overflow:hidden;
  transition:border-color .2s ease,background-color .2s ease;
}
.faq-item.is-open{background:var(--brand-soft);border-color:rgba(226,84,42,.32);}
.faq-q{
  width:100%;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;
  background:none;border:0;
  font-size:16.5px;font-weight:600;color:var(--ink);
  cursor:pointer;
}
.faq-item.is-open .faq-q{color:var(--brand-dark);padding-left:23px;}
.faq-item.is-open{border-left:3px solid var(--brand);}
.faq-ico{
  flex:0 0 22px;width:22px;height:22px;border-radius:6px;
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);font-size:15px;font-weight:700;
}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a p{
  margin:0;padding:0 20px 20px;
  font-size:15px;color:var(--ink-2);line-height:1.8;
}

/* ============ CTA ============ */
.cta-panel{
  margin-top:var(--gap-section);
  background:var(--panel);
  border-radius:var(--radius-lg);
  padding:40px 26px;
  color:#fff;
  box-shadow:var(--shadow-panel);
  position:relative;
  overflow:hidden;
}
.cta-panel::after{
  content:"";position:absolute;right:-80px;top:-60px;
  width:280px;height:280px;border-radius:50%;
  border:1px solid rgba(255,255,255,.08);
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr;gap:28px;}
.cta-copy h2{font-size:28px;margin-bottom:12px;color:#fff;}
.cta-copy p{color:rgba(255,255,255,.76);font-size:16px;margin-bottom:18px;}
.cta-points{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:10px;}
.cta-points li{
  font-size:13px;color:rgba(255,255,255,.86);
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.16);
  padding:6px 12px;border-radius:999px;
}
.form-card{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-md);
  padding:22px;
}
.form-card label{
  display:block;font-size:13px;color:rgba(255,255,255,.72);
  margin-bottom:6px;letter-spacing:.02em;
}
.form-card .field{margin-bottom:14px;}
.form-card input,.form-card textarea{
  width:100%;min-height:46px;
  padding:11px 14px;
  border-radius:var(--radius-btn);
  border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.96);
  color:var(--ink);font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.form-card textarea{min-height:96px;resize:vertical;line-height:1.7;}
.form-card input:focus,.form-card textarea:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(226,84,42,.18);
}
.form-card .btn-brand{width:100%;}
.privacy-note{font-size:13px;color:rgba(255,255,255,.58);margin:12px 0 0;line-height:1.7;}
.form-status{font-size:14px;margin:10px 0 0;min-height:20px;}
.form-status.ok{color:#8FE0C3;}
.form-status.err{color:#F5A79A;}

/* ============ footer ============ */
.site-footer{
  margin-top:var(--gap-section);
  background:var(--panel);
  color:#C9D3D0;
  padding:56px 0 24px;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:32px;
  padding-bottom:28px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-col h4{
  font-size:14px;font-weight:700;color:#fff;
  margin-bottom:14px;letter-spacing:.02em;
}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:10px;font-size:14px;line-height:1.7;}
.footer-col a{font-size:14px;color:#C9D3D0;border-bottom:2px solid transparent;padding-bottom:2px;}
.footer-col a:hover{color:#fff;border-bottom-color:var(--brand);}
.footer-brand p{font-size:14px;color:rgba(201,211,208,.86);margin:14px 0 0;max-width:320px;line-height:1.8;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text em{color:rgba(201,211,208,.6);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:8px 20px;
  justify-content:space-between;
  padding-top:20px;
  font-size:13px;color:rgba(201,211,208,.66);
}

/* 返回顶部 */
.back-top{
  position:fixed;right:18px;bottom:22px;z-index:1040;
  width:46px;height:46px;border-radius:50%;
  background:var(--panel);color:#fff;border:1px solid rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-panel);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background-color .2s ease;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{background:var(--brand);color:#fff;}

/* ============ responsive ============ */
@media (max-width:991.98px){
  :root{--gap-section:72px;}
  .nav-toggle{display:block;order:2;}
  .brand{order:1;}
  .header-cta{
    order:3;
    display:none;
  }
  .nav-panel{
    order:4;flex:1 0 100%;
    margin:0 0 14px;
  }
  .nav-panel.show,.nav-panel.collapsing{display:block;}
  .nav-cards{
    flex-direction:column;align-items:stretch;
    padding:10px;border-radius:var(--radius-md);
    box-shadow:none;background:var(--surface);
  }
  .nav-card{justify-content:flex-start;padding:12px 14px;}
  .nav-card.active{background:var(--brand-soft);}
  .nav-card.active::before{
    left:0;right:0;top:auto;bottom:0;height:2px;width:auto;border-radius:2px;
  }
  .header-inner{flex-wrap:wrap;min-height:72px;padding-top:8px;}
  .site-header.is-stuck .header-inner{min-height:64px;}
  .faq-side p{max-width:none;}
}
@media (min-width:992px){
  .nav-toggle{display:none;}
  .nav-panel.collapse{display:flex !important;}
  .feature-card{grid-template-columns:1.1fr .9fr;}
  .feature-media{min-height:100%;}
  .feature-body{padding:40px 38px;}
  .stat-strip{grid-template-columns:repeat(3,1fr);gap:20px;}
  .metric-grid{grid-template-columns:repeat(3,1fr);}
  .compare{grid-template-columns:1fr 1fr;gap:24px;}
  .faq-wrap{grid-template-columns:280px 1fr;gap:40px;}
  .cta-grid{grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
  .cta-panel{padding:56px 48px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;}
  .section-head h2{font-size:32px;}
  .cat-hero-inner{padding:52px 44px;}
  .cat-hero h1{font-size:40px;}
}
@media (min-width:1200px){
  :root{--gap-section:104px;}
  .metric-grid{grid-template-columns:repeat(3,1fr);gap:24px;}
  .metric-grid .metric-card:nth-child(2){transform:translateY(-14px);}
  .metric-grid .metric-card:nth-child(2):hover{transform:translateY(-17px);}
}
@media (max-width:575.98px){
  body{font-size:16px;}
  .cat-hero h1{font-size:26px;}
  .section-head h2{font-size:22px;}
  .feature-body h2{font-size:22px;}
  .cta-copy h2{font-size:23px;}
  .stat-num{font-size:28px;}
  .brand-text strong{font-size:16px;}
}