/* roulang page: index */
/* ============ 设计令牌 ============ */
:root{
  --ink-900:#16142B;
  --ink-700:#2A2748;
  --ink-500:#4A4766;
  --sand-050:#F6F4EF;
  --sand-100:#EDEAE2;
  --line:#DCD7CC;
  --accent:#3FC1B0;
  --accent-strong:#2AA495;
  --glow:#FFC46B;
  --text:#1E1C33;
  --text-muted:#6B6880;
  --danger:#C8462F;
  --success:#2F8F6B;
  --radius-card:16px;
  --radius-img:12px;
  --radius-hero:20px;
  --shadow-1:0 1px 2px rgba(22,20,43,.06);
  --shadow-2:0 12px 32px -16px rgba(22,20,43,.16);
  --shadow-3:0 18px 44px -18px rgba(22,20,43,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1180px;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:Inter,"Helvetica Neue",Arial,sans-serif;
}
/* ============ reset & base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--sand-050);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none;margin:0;padding:0}
a{color:var(--ink-900);text-decoration:none;transition:color .2s var(--ease)}
a:hover,a:focus{color:var(--accent-strong)}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:600;line-height:1.2;letter-spacing:-.01em;color:var(--ink-900)}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
button,input,textarea,select{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:rgba(63,193,176,.28)}
.grid-container{max-width:var(--container);padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--sand{background:var(--sand-100)}
.section--dark{background:var(--ink-900);color:rgba(255,255,255,.78)}
.section--dark h2,.section--dark h3{color:#fff}
.eyebrow{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-muted);
  display:inline-block;
  margin-bottom:14px;
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(28px,3.6vw,40px)}
.section-head p{color:var(--text-muted);max-width:560px;font-size:15px;margin:10px 0 0}
.lead{font-size:17px;line-height:1.9;color:var(--ink-500)}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),
             border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  white-space:nowrap;line-height:1;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover,.btn-primary:focus{background:var(--accent-strong);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover,.btn-ghost:focus{border-color:var(--accent);color:var(--accent-strong)}
.btn-light{background:#fff;color:var(--ink-900);border-color:transparent}
.btn-light:hover,.btn-light:focus{background:var(--sand-100);color:var(--ink-900);transform:translateY(-1px)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.34);color:#fff}
.btn-outline-light:hover,.btn-outline-light:focus{border-color:#fff;color:#fff}
.btn-sm{height:44px;padding:0 22px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none}
.arrow-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink-900);
  border-bottom:1px solid transparent;padding-bottom:2px;position:relative;
}
.arrow-link::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:currentColor;
  transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
}
.arrow-link:hover::after,.arrow-link:focus::after{transform:scaleX(1)}
.arrow-link .ico{transition:transform .22s var(--ease)}
.arrow-link:hover .ico{transform:translateX(4px)}
/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;line-height:1;padding:7px 11px;border-radius:8px;
  background:var(--sand-100);color:var(--ink-700);font-weight:600;
}
.badge--glow{background:var(--glow);color:#4A3410}
.badge--dark{background:rgba(255,255,255,.1);color:rgba(255,255,255,.86);border:1px solid rgba(255,255,255,.16)}
.badge--accent{background:rgba(63,193,176,.14);color:#1F7C70}
/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.86);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background-color .25s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 0 rgba(22,20,43,.03),var(--shadow-1)}
.nav-wrap{display:flex;align-items:center;gap:28px;height:76px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:26px;height:26px;flex:0 0 26px}
.brand-text{font-family:var(--font-serif);font-size:17px;font-weight:600;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:12px}
.nav-link{
  position:relative;font-size:15px;color:var(--ink-500);padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.nav-link:hover,.nav-link:focus{color:var(--ink-900)}
.nav-link:hover::after,.nav-link:focus::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-900);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-cta{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{
  position:fixed;inset:64px 0 0 0;background:var(--ink-900);z-index:55;
  padding:32px 24px 40px;display:none;flex-direction:column;
  overflow-y:auto;
}
.drawer.is-open{display:flex}
.drawer a.drawer-link{
  color:rgba(255,255,255,.86);font-size:19px;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.12);
  font-family:var(--font-serif);
}
.drawer a.drawer-link.is-active,.drawer a.drawer-link:hover{color:#fff}
.drawer-foot{margin-top:28px;display:flex;flex-direction:column;gap:12px}
/* ============ Hero ============ */
.hero{position:relative;padding:80px 0 88px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(760px 420px at 82% 10%,rgba(63,193,176,.12),transparent 70%),
             radial-gradient(500px 320px at 6% 92%,rgba(255,196,107,.10),transparent 70%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero-copy{max-width:600px}
.hero h1{
  font-size:clamp(34px,5vw,60px);
  line-height:1.14;
  margin:18px 0 20px;
}
.hero-sub{font-size:17px;color:var(--text-muted);max-width:520px;margin-bottom:32px}
.hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-bottom:26px}
.hero-points{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--text-muted)}
.hero-points li{display:flex;align-items:center;gap:7px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}
.hero-visual{position:relative;border-radius:var(--radius-hero);overflow:hidden;aspect-ratio:16/10;background:linear-gradient(140deg,#1F1D3A,#2A2748)}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(155deg,rgba(22,20,43,.62),rgba(22,20,43,.06) 62%,rgba(22,20,43,0));
}
.hero-visual .float-card{
  position:absolute;left:22px;bottom:22px;right:22px;
  background:rgba(255,255,255,.94);border-radius:14px;padding:14px 18px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  box-shadow:var(--shadow-2);border:1px solid rgba(255,255,255,.6);
}
.float-card .fc-label{font-size:12px;color:var(--text-muted);letter-spacing:.08em}
.float-card strong{font-family:var(--font-num);font-size:20px;color:var(--ink-900)}
.stars span{
  position:absolute;width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.85);
  animation:twinkle 5s ease-in-out infinite;
}
.stars span:nth-child(1){top:16%;left:64%;animation-delay:.2s}
.stars span:nth-child(2){top:32%;left:82%;animation-delay:1.1s}
.stars span:nth-child(3){top:64%;left:72%;animation-delay:2.0s}
.stars span:nth-child(4){top:22%;left:46%;animation-delay:.7s}
.stars span:nth-child(5){top:76%;left:88%;animation-delay:1.6s}
.stars span:nth-child(6){top:48%;left:56%;animation-delay:2.6s}
@keyframes twinkle{0%,100%{opacity:.3}50%{opacity:.7}}
/* ============ 品牌主张条 ============ */
.claim-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--sand-050)}
.claim-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.claim-item{
  padding:26px 28px;font-size:15px;color:var(--ink-700);display:flex;align-items:center;gap:12px;
  border-left:1px solid var(--line);
}
.claim-item:first-child{border-left:0;padding-left:0}
.claim-item svg{flex:0 0 18px}
/* ============ 故事区 ============ */
.story{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.story h2{font-size:clamp(28px,3.6vw,40px);margin-bottom:22px}
.story p{color:var(--ink-500);margin-bottom:16px;max-width:520px}
.story-media{border-radius:var(--radius-hero);overflow:hidden;aspect-ratio:4/3;background:linear-gradient(140deg,#E7E3DA,#DCD7CC);position:relative}
.story-media img{width:100%;height:100%;object-fit:cover}
.story-media .quote{
  position:absolute;left:20px;bottom:20px;right:20px;background:rgba(22,20,43,.86);color:#fff;
  border-radius:12px;padding:16px 18px;font-size:14px;line-height:1.7;
}
/* ============ 精选内容卡 ============ */
.feature-grid{display:grid;grid-template-columns:8fr 4fr;gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;transition:transform .22s var(--ease),box-shadow .22s var(--ease);
  display:flex;flex-direction:column;height:100%;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.card-media{overflow:hidden;background:linear-gradient(140deg,#E7E3DA,#DCD7CC);aspect-ratio:16/10}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:26px 28px 28px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:22px}
.card--big .card-body h3{font-size:clamp(22px,2.4vw,28px)}
.card-body p{color:var(--ink-500);font-size:15px}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:14px;padding-top:6px}
.card--mini .card-media{aspect-ratio:16/9;border-radius:0}
.card--mini .card-body{padding:20px 22px 22px;gap:9px}
.card--mini .card-body h3{font-size:19px}
.stack{display:flex;flex-direction:column;gap:24px}
/* ============ 最新信息列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.news-card{
  display:grid;grid-template-columns:40% 1fr;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
.news-media{overflow:hidden;background:linear-gradient(140deg,#E7E3DA,#DCD7CC);min-height:170px}
.news-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.news-card:hover .news-media img{transform:scale(1.03)}
.news-body{padding:20px 22px;display:flex;flex-direction:column;gap:10px}
.news-body h3{font-size:18px;line-height:1.35}
.news-body h3 a{color:var(--ink-900)}
.news-body h3 a:hover{color:var(--accent-strong)}
.news-body p{font-size:14px;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;flex-wrap:wrap}
.news-meta time{font-family:var(--font-num);font-size:13px;color:var(--text-muted);letter-spacing:.02em}
.empty-state{
  grid-column:1 / -1;background:#fff;border:1px dashed var(--line);border-radius:var(--radius-card);
  padding:48px 28px;text-align:center;
}
.empty-state p{font-size:16px;color:var(--ink-500);margin-bottom:18px}
/* ============ 信任背书 ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:56px}
.stat{padding:8px 0;border-top:2px solid var(--ink-900)}
.stat-num{font-family:var(--font-num);font-size:clamp(40px,4.6vw,48px);font-weight:600;color:var(--ink-900);line-height:1.05;letter-spacing:-.02em;display:block;margin:20px 0 8px}
.stat-label{font-size:13px;color:var(--text-muted)}
.logo-row{display:flex;flex-wrap:wrap;gap:14px}
.logo-chip{
  font-size:13px;color:var(--ink-500);border:1px solid var(--line);border-radius:999px;
  padding:10px 18px;background:#fff;
}
.logo-chip:hover{border-color:var(--accent);color:var(--ink-900)}
/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--ink-900);font-family:var(--font-sans);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;position:relative;border-radius:50%;
  border:1px solid var(--line);transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink-700);border-radius:2px}
.faq-icon::before{left:50%;top:6px;width:1.5px;height:10px;transform:translateX(-50%)}
.faq-icon::after{top:50%;left:6px;height:1.5px;width:10px;transform:translateY(-50%)}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:var(--accent)}
.faq-item[open] .faq-icon::before,.faq-item[open] .faq-icon::after{background:var(--accent)}
.faq-answer{padding:0 4px 22px 38px;color:var(--ink-500);font-size:16px;line-height:1.85;max-width:860px}
/* ============ CTA 带 ============ */
.cta-band{background:var(--ink-900);color:rgba(255,255,255,.76);position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(600px 320px at 88% 20%,rgba(63,193,176,.18),transparent 68%);
}
.cta-inner{position:relative;display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.cta-inner h2{font-size:clamp(26px,3.2vw,36px);color:#fff;margin-bottom:14px}
.cta-form .field{display:flex;gap:12px}
.cta-form input[type=email]{
  flex:1;height:48px;border-radius:12px;border:1px solid rgba(255,255,255,.24);
  background:rgba(255,255,255,.06);color:#fff;padding:0 16px;font-size:15px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cta-form input[type=email]::placeholder{color:rgba(255,255,255,.5)}
.cta-form input[type=email]:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(63,193,176,.24)}
.cta-form.is-error input[type=email]{border-color:var(--danger);box-shadow:0 0 0 3px rgba(200,70,47,.2)}
.cta-form.is-success input[type=email]{border-color:var(--success);box-shadow:0 0 0 3px rgba(47,143,107,.2)}
.form-msg{margin-top:12px;font-size:13px;min-height:18px;color:rgba(255,255,255,.7)}
.form-msg.is-error{color:#F3A99A}
.form-msg.is-success{color:#8FE0C1}
.privacy{margin-top:10px;font-size:12px;color:rgba(255,255,255,.5);line-height:1.7}
/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:76px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:0}
.footer-col{padding:0 28px;border-left:1px solid rgba(255,255,255,.1)}
.footer-col:first-child{border-left:0;padding-left:0}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:18px;font-family:var(--font-sans);font-weight:600;letter-spacing:.02em}
.footer-col p{font-size:14px;line-height:1.8;max-width:300px;margin-top:14px}
.footer-col ul li{margin-bottom:11px}
.footer-col ul a{color:rgba(255,255,255,.72);font-size:14px}
.footer-col ul a:hover{color:#fff}
.footer-brand{display:inline-flex;align-items:center;gap:10px}
.footer-brand .brand-text{color:#fff}
.footer-bottom{
  margin-top:64px;border-top:1px solid rgba(255,255,255,.1);
  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,.55);
}
.footer-bottom a{color:rgba(255,255,255,.55)}
.footer-bottom a:hover{color:#fff}
/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
/* ============ 响应式 ============ */
@media screen and (max-width:1023px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .nav-wrap{height:64px}
  .hero{padding:56px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:2}
  .story{grid-template-columns:1fr;gap:36px}
  .feature-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .cta-inner{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:36px 0}
  .footer-col:nth-child(odd){border-left:0;padding-left:0}
  .section{padding:72px 0}
}
@media screen and (max-width:767px){
  .grid-container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .claim-list{grid-template-columns:1fr}
  .claim-item{border-left:0;border-top:1px solid var(--line);padding:18px 0}
  .claim-item:first-child{border-top:0}
  .news-card{grid-template-columns:1fr}
  .news-media{min-height:180px;aspect-ratio:16/9}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn,.hero-actions .arrow-link{justify-content:center}
  .cta-form .field{flex-direction:column}
  .cta-form .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-col{border-left:0;padding:0}
  .faq-answer{padding-left:0}
}
@media screen and (max-width:479px){
  .stats{grid-template-columns:repeat(2,1fr);gap:18px}
  .hero h1{font-size:32px}
  .float-card{flex-direction:column;align-items:flex-start;gap:4px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink-900:#16142B;
  --ink-700:#2A2748;
  --ink-500:#4A4766;
  --sand-050:#F6F4EF;
  --sand-100:#EDEAE2;
  --line:#DCD7CC;
  --accent:#3FC1B0;
  --accent-strong:#2AA495;
  --glow:#FFC46B;
  --text:#1E1C33;
  --text-muted:#6B6880;
  --danger:#C8462F;
  --success:#2F8F6B;
  --white:#FFFFFF;
  --radius-card:16px;
  --radius-img:12px;
  --radius-hero:20px;
  --shadow-1:0 1px 2px rgba(22,20,43,.06);
  --shadow-2:0 12px 32px -16px rgba(22,20,43,.16);
  --shadow-3:0 18px 44px -18px rgba(22,20,43,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter","SF Mono",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--sand-050);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{list-style:none;padding:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
::selection{background:rgba(63,193,176,.25)}

.grid-container{width:100%;max-width:1180px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding:96px 0}
.section-tight{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.eyebrow{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-muted);
  margin-bottom:14px;
  display:block;
}
.h2{font-family:var(--font-serif);font-weight:600;font-size:clamp(28px,3.6vw,40px);line-height:1.22;letter-spacing:-.01em;color:var(--ink-900)}
.h3{font-family:var(--font-serif);font-weight:600;font-size:clamp(20px,2.1vw,24px);line-height:1.3;letter-spacing:-.01em;color:var(--ink-900)}
.lead{color:var(--text-muted);max-width:600px;font-size:16px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;min-height:44px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--accent-strong);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0);background:#248f83}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-strong)}
.btn-nav{height:44px;padding:0 22px}
.btn-block{width:100%;display:flex}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.text-link{
  display:inline-flex;align-items:center;gap:6px;position:relative;
  font-size:15px;font-weight:600;color:var(--ink-900);padding-bottom:3px;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:currentColor;transform:scaleX(1);transform-origin:left;
  transition:transform .2s var(--ease),background-color .2s var(--ease);
}
.text-link:hover{color:var(--accent-strong)}
.text-link:hover::after{background:var(--accent-strong)}
.text-link .arrow{transition:transform .22s var(--ease)}
.text-link:hover .arrow{transform:translateX(4px)}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:8px;
  font-size:13px;font-weight:600;background:var(--sand-100);color:var(--ink-700);white-space:nowrap;
}
.badge-glow{background:rgba(255,196,107,.28);color:#7A4E12}
.badge-line{background:transparent;border:1px solid var(--line);color:var(--ink-500)}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,244,239,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(22,20,43,.06)}
.header-inner{display:flex;align-items:center;gap:24px;height:76px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:26px;height:26px;flex:0 0 auto}
.brand-text{font-family:var(--font-serif);font-size:18px;font-weight:600;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px;margin:0 auto}
.nav-link{position:relative;font-size:15px;color:var(--ink-500);padding:6px 0;transition:color .2s var(--ease)}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent);
  transition:width .2s var(--ease);
}
.nav-link:hover,.nav-link.is-active{color:var(--ink-900)}
.nav-link:hover::after,.nav-link.is-active::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:transparent;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:0;z-index:80;background:var(--ink-900);
  display:flex;flex-direction:column;justify-content:space-between;
  padding:96px 24px 40px;
  transform:translateY(-100%);opacity:0;visibility:hidden;
  transition:transform .22s var(--ease),opacity .22s var(--ease),visibility .22s;
}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{
  color:rgba(255,255,255,.82);font-family:var(--font-serif);font-size:22px;font-weight:600;
  padding:16px 0;border-bottom:1px solid rgba(255,255,255,.14);
}
.drawer-nav a:hover{color:#fff}
.drawer-actions{display:flex;flex-direction:column;gap:12px}
.drawer-close{
  position:absolute;top:20px;right:20px;width:44px;height:44px;border-radius:12px;
  border:1px solid rgba(255,255,255,.24);background:transparent;color:#fff;font-size:20px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}

/* 阅读进度 */
.read-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:90;transition:width .1s linear}

/* 文章头部 */
.article-head{position:relative;padding:44px 0 0;background:linear-gradient(180deg,rgba(63,193,176,.08),rgba(246,244,239,0) 70%);overflow:hidden}
.article-head .spark{position:absolute;width:5px;height:5px;border-radius:50%;background:var(--accent);opacity:.4;animation:twinkle 5.5s ease-in-out infinite}
.spark-1{top:36px;right:16%}
.spark-2{top:110px;right:8%;animation-delay:1.4s;background:var(--glow)}
.spark-3{top:186px;right:24%;animation-delay:2.6s}
@keyframes twinkle{0%,100%{opacity:.3;transform:scale(.9)}50%{opacity:.7;transform:scale(1.15)}}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-muted);position:relative;z-index:2}
.breadcrumb a:hover{color:var(--accent-strong)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink-900)}
.article-title{
  font-family:var(--font-serif);font-weight:600;
  font-size:clamp(28px,4.4vw,42px);line-height:1.26;letter-spacing:-.01em;
  color:var(--ink-900);margin:18px 0 20px;max-width:920px;position:relative;z-index:2;
}
.article-meta{
  display:flex;flex-wrap:wrap;gap:10px 26px;font-size:13px;color:var(--text-muted);
  font-variant-numeric:tabular-nums;position:relative;z-index:2;padding-bottom:28px;
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:8px}
.article-meta .meta-item::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);opacity:.7}
.head-divider{height:1px;background:var(--line)}

/* 正文 */
.article-main{padding:64px 0 80px}
.article-body{max-width:760px;margin:0 auto;font-size:17px;line-height:1.9;color:var(--text);overflow-wrap:break-word}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-family:var(--font-serif);font-weight:600;font-size:clamp(22px,2.8vw,30px);line-height:1.32;
  color:var(--ink-900);margin:48px 0 20px;padding-left:16px;border-left:3px solid var(--accent);
}
.article-body h3{font-family:var(--font-serif);font-weight:600;font-size:20px;line-height:1.4;color:var(--ink-900);margin:34px 0 14px}
.article-body h4{font-size:17px;font-weight:700;color:var(--ink-900);margin:26px 0 12px}
.article-body a{color:var(--accent-strong);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--ink-900)}
.article-body strong{color:var(--ink-900);font-weight:700}
.article-body blockquote{
  margin:28px 0;padding:20px 24px;background:var(--sand-100);
  border-left:3px solid var(--accent);border-radius:0 12px 12px 0;color:var(--ink-500);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);margin:28px auto}
.article-body figure{margin:28px 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-muted);margin-top:10px}
.article-body ul{margin:0 0 1.2em}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:10px}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.78em;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.article-body ol{list-style:decimal;margin:0 0 1.2em;padding-left:24px}
.article-body ol li{margin-bottom:10px;padding-left:4px}
.article-body table{margin:26px 0;font-size:15px}
.article-body th{background:var(--ink-900);color:#fff;padding:12px 14px;text-align:left;font-weight:600}
.article-body td{padding:12px 14px;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even){background:var(--sand-050)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}

/* 空态 */
.empty-state{
  max-width:760px;margin:0 auto;text-align:center;background:#fff;
  border:1px dashed var(--line);border-radius:var(--radius-card);padding:64px 24px;box-shadow:var(--shadow-1);
}
.empty-state p{font-size:16px;color:var(--text-muted);margin-bottom:22px}

/* 相关推荐 */
.related{padding:0 0 24px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3);border-color:#CFC9BC}
.card-media{aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,var(--sand-100),var(--sand-050))}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-title{font-family:var(--font-serif);font-size:19px;font-weight:600;line-height:1.4;color:var(--ink-900)}
.card-desc{font-size:14px;color:var(--text-muted);line-height:1.8}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:6px}

/* 返回入口 */
.back-row{display:flex;flex-wrap:wrap;gap:16px 36px;align-items:center;padding:32px 0 0}
.back-row .label{font-size:13px;color:var(--text-muted)}

/* CTA 带 */
.cta-band{padding:0 0 96px}
.cta-inner{
  background:var(--ink-900);border-radius:var(--radius-hero);padding:48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  background-image:linear-gradient(90deg,rgba(22,20,43,.96),rgba(22,20,43,.78)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.cta-inner .cta-title{font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);font-weight:600;color:#fff;line-height:1.3}
.cta-inner .cta-desc{color:rgba(255,255,255,.72);font-size:15px;margin-top:10px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-outline-light:hover{border-color:var(--accent);color:var(--accent)}
.cta-band .btn-primary{background:var(--accent);color:#fff}

/* 页脚 */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:0}
.footer-col{padding:0 28px;border-left:1px solid rgba(255,255,255,.14)}
.footer-col:first-child{border-left:0;padding-left:0}
.footer-col:last-child{padding-right:0}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{color:#fff;font-family:var(--font-serif);font-size:18px;font-weight:600}
.footer-col p{font-size:14px;line-height:1.8;max-width:300px;color:rgba(255,255,255,.62)}
.footer-col h3{font-size:14px;color:#fff;font-weight:600;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul li{font-size:14px;color:rgba(255,255,255,.62)}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s var(--ease)}
.footer-col ul a:hover{color:#fff}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.14);
  padding:24px 0 32px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}
.footer-bottom a{color:rgba(255,255,255,.72);text-decoration:underline;text-underline-offset:3px}
.footer-bottom a:hover{color:#fff}

/* 响应式 */
@media (max-width:1023px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .header-inner{height:64px;justify-content:space-between}
  .mobile-drawer{padding-top:88px}
  .section{padding:72px 0}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px 0}
  .footer-col:nth-child(3){border-left:0;padding-left:0}
  .footer-col{padding:0 20px}
}
@media (max-width:767px){
  .grid-container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .article-main{padding:40px 0 56px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .cta-inner{padding:32px 24px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .related{padding-bottom:16px}
  .cta-band{padding-bottom:64px}
  .back-row{gap:14px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-col{border-left:0;padding:0}
  .site-footer{padding-top:56px}
}
@media (max-width:479px){
  .article-title{font-size:26px}
  .breadcrumb{font-size:12px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .article-head .spark{animation:none;opacity:.35}
}

/* roulang page: category1 */
:root{
  --ink-900:#16142B;
  --ink-700:#2A2748;
  --ink-500:#4A4766;
  --sand-050:#F6F4EF;
  --sand-100:#EDEAE2;
  --line:#DCD7CC;
  --accent:#3FC1B0;
  --accent-strong:#2AA495;
  --glow:#FFC46B;
  --text:#1E1C33;
  --text-muted:#6B6880;
  --danger:#C8462F;
  --success:#2F8F6B;
  --r-card:16px;
  --r-img:12px;
  --r-hero:20px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(22,20,43,.06);
  --shadow-2:0 12px 32px -16px rgba(22,20,43,.16);
  --shadow-3:0 18px 44px -18px rgba(22,20,43,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--sand-050);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--ink-900);text-decoration:none;transition:color .2s var(--ease)}
p{margin:0 0 1.1em}
h1,h2,h3,h4{
  font-family:var(--font-serif);
  font-weight:600;
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--ink-900);
  margin:0;
}
button{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:6px;
}

.grid-container{
  max-width:1180px;
  margin-left:auto;
  margin-right:auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,244,239,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-1);
}
.nav-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:76px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{width:26px;height:26px;flex:0 0 auto}
.brand-text{
  font-family:var(--font-serif);
  font-size:19px;
  font-weight:600;
  color:var(--ink-900);
  letter-spacing:.01em;
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:30px;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  color:var(--ink-500);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  background:var(--accent);
  border-radius:2px;
  transition:width .2s var(--ease);
}
.nav-link:hover{color:var(--ink-900)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--ink-900);font-weight:600}
.nav-link.is-active::after{width:100%}
.nav-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 26px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-strong);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-outline-light:hover{border-color:var(--accent);color:var(--accent)}
.btn-block{width:100%}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding-bottom:2px;
  font-size:15px;
  font-weight:600;
  color:var(--ink-900);
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(var(--accent),var(--accent));
  background-repeat:no-repeat;
  background-size:0 1px;
  background-position:0 100%;
  transition:background-size .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.link-arrow::after{
  content:"→";
  font-family:var(--font-num);
  transition:transform .2s var(--ease);
}
.link-arrow:hover{color:var(--accent);border-color:transparent;background-size:100% 1px}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- 汉堡与抽屉 ---------- */
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--ink-900);
  transition:transform .2s var(--ease);
}
.nav-toggle span{position:relative}
.nav-toggle span::before{position:absolute;left:0;top:-6px}
.nav-toggle span::after{position:absolute;left:0;top:6px}

.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:90;
  display:flex;
  flex-direction:column;
  padding:22px 24px 32px;
  background:var(--ink-900);
  color:#fff;
  transform:translateY(-100%);
  transition:transform .28s var(--ease);
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0)}
.drawer-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:20px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.drawer-brand{
  font-family:var(--font-serif);
  font-size:18px;
  font-weight:600;
  color:#fff;
}
.drawer-close{
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.2);
  background:transparent;
  color:#fff;
  font-size:22px;
  line-height:1;
  cursor:pointer;
}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-nav{
  display:flex;
  flex-direction:column;
  padding:16px 0;
}
.drawer-nav a{
  padding:16px 0;
  font-size:17px;
  color:rgba(255,255,255,.82);
  border-bottom:1px solid rgba(255,255,255,.1);
}
.drawer-nav a.is-active{color:var(--accent)}
.drawer-nav a:hover{color:#fff}
.drawer-actions{
  margin-top:auto;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding-top:28px;
}

/* ---------- 窄带 Hero ---------- */
.page-hero{
  position:relative;
  min-height:300px;
  display:flex;
  align-items:center;
  padding:64px 0;
  background:var(--ink-900);
  overflow:hidden;
  color:#fff;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.42;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(22,20,43,.95) 0%,rgba(22,20,43,.68) 55%,rgba(22,20,43,.88) 100%);
}
.page-hero .grid-container{position:relative;z-index:3;width:100%}
.stars{position:absolute;inset:0;z-index:2;pointer-events:none}
.star{
  position:absolute;
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--glow);
  opacity:.4;
  animation:twinkle 5.5s ease-in-out infinite;
}
.star.s1{top:24%;left:70%;animation-delay:.2s}
.star.s2{top:62%;left:82%;width:4px;height:4px;animation-delay:1.4s}
.star.s3{top:34%;left:52%;width:3px;height:3px;animation-delay:2.6s}
.star.s4{top:76%;left:62%;width:4px;height:4px;animation-delay:3.4s}
.star.s5{top:18%;left:88%;width:3px;height:3px;animation-delay:4.2s}
@keyframes twinkle{
  0%,100%{opacity:.3;transform:scale(1)}
  50%{opacity:.7;transform:scale(1.25)}
}

.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(255,255,255,.6);
  margin-bottom:18px;
}
.breadcrumb a{color:rgba(255,255,255,.62)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb em{font-style:normal;color:#fff}
.breadcrumb .sep{color:rgba(255,255,255,.36)}

.page-hero h1{
  color:#fff;
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.16;
  max-width:820px;
  animation:fadeUp .5s var(--ease) both;
}
.hero-sub{
  margin:16px 0 0;
  font-size:clamp(15px,1.6vw,17px);
  color:rgba(255,255,255,.76);
  max-width:520px;
  animation:fadeUp .5s .08s var(--ease) both;
}
@keyframes fadeUp{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}

/* ---------- 分类 chips ---------- */
.chip-section{
  background:#fff;
  border-bottom:1px solid var(--line);
}
.chip-row{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  padding:22px 0;
}
.chip{
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:#fff;
  font-size:14px;
  color:var(--ink-700);
  transition:all .2s var(--ease);
}
.chip:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.chip.is-active{
  border-color:var(--accent);
  color:var(--accent);
  background:rgba(63,193,176,.08);
  box-shadow:inset 0 0 0 1px var(--accent);
}

/* ---------- 板块通用 ---------- */
.section-head{
  max-width:660px;
  margin-bottom:40px;
}
.eyebrow{
  display:block;
  font-family:var(--font-num);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-muted);
  margin-bottom:14px;
}
.section-head h2{
  font-size:clamp(28px,3.4vw,40px);
}
.section-lead{
  margin:14px 0 0;
  font-size:16px;
  color:var(--text-muted);
  max-width:560px;
}

/* ---------- 图文交替长条 ---------- */
.strips-section{
  padding:96px 0 72px;
}
.strip{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  padding:44px 0;
  border-top:1px solid var(--line);
}
.strip:first-of-type{border-top:none;padding-top:8px}
.strip.reverse .strip-media{order:2}
.strip-media{
  position:relative;
  border-radius:var(--r-hero);
  overflow:hidden;
  box-shadow:var(--shadow-2);
  background:linear-gradient(140deg,var(--ink-700),var(--ink-900));
}
.strip-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .28s var(--ease);
}
.strip:hover .strip-media img{transform:scale(1.03)}
.strip-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(22,20,43,.18) 0%,rgba(22,20,43,0) 42%);
  pointer-events:none;
}
.strip-body{padding:4px 0}
.strip-num{
  display:block;
  font-family:var(--font-num);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-muted);
  margin-bottom:12px;
}
.strip-body h3{
  font-size:clamp(20px,2.2vw,24px);
  margin-bottom:14px;
}
.strip-body p{
  margin:0 0 10px;
  font-size:15.5px;
  color:var(--ink-500);
  line-height:1.85;
}
.strip-body .link-arrow{margin-top:10px}

/* ---------- 数字背书条 ---------- */
.stats-band{
  padding:80px 0;
  background:#fff;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:40px;
}
.stat{
  padding-left:22px;
  border-left:2px solid var(--accent);
}
.stat-num{
  display:block;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  font-size:clamp(40px,4.6vw,48px);
  line-height:1.05;
  color:var(--ink-900);
  letter-spacing:-.02em;
}
.stat-label{
  display:block;
  margin-top:8px;
  font-size:15px;
  font-weight:600;
  color:var(--ink-700);
}
.stat p{
  margin:8px 0 0;
  font-size:13px;
  color:var(--text-muted);
  line-height:1.75;
}

/* ---------- CTA 带 ---------- */
.cta-band{
  padding:80px 0;
  background:var(--ink-900);
  color:#fff;
  position:relative;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;
  background-position:center right;
  opacity:.16;
}
.cta-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.25fr .75fr;
  gap:40px;
  align-items:center;
}
.cta-copy h2{
  color:#fff;
  font-size:clamp(26px,3.2vw,36px);
}
.cta-copy p{
  margin:14px 0 0;
  max-width:520px;
  font-size:16px;
  color:rgba(255,255,255,.74);
}
.cta-actions{
  display:flex;
  gap:14px;
  justify-content:flex-end;
  flex-wrap:wrap;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.72);
  padding:64px 0 26px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:36px;
}
.footer-col h3{
  color:#fff;
  font-size:15px;
  font-family:var(--font-sans);
  font-weight:600;
  letter-spacing:.02em;
  margin-bottom:16px;
}
.footer-col p{
  margin:14px 0 0;
  line-height:1.85;
  font-size:13.5px;
}
.footer-col ul li{
  margin-bottom:10px;
  font-size:13.5px;
  line-height:1.7;
}
.footer-col a{color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.footer-brand .brand-mark{width:24px;height:24px}
.footer-brand .brand-text{
  color:#fff;
  font-size:17px;
  font-family:var(--font-serif);
  white-space:normal;
}
.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.6);
}
.footer-col + .footer-col{
  border-left:1px solid rgba(255,255,255,.1);
  padding-left:26px;
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links,.nav-actions{display:none}
  .nav-toggle{display:inline-flex}
  .strip{
    grid-template-columns:1fr;
    gap:24px;
    padding:36px 0;
  }
  .strip.reverse .strip-media{order:0}
  .cta-grid{grid-template-columns:1fr}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .footer-col + .footer-col{border-left:none;padding-left:0}
  .strips-section{padding:72px 0 56px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .grid-container{padding-left:20px;padding-right:20px}
  .nav-bar{height:64px}
  .brand-text{font-size:17px}
  .page-hero{min-height:260px;padding:48px 0}
  .strips-section{padding:56px 0 40px}
  .stats-band,.cta-band{padding:56px 0}
  .stats-grid{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn{width:100%;height:48px}
  .nav-toggle,.drawer-close{width:44px;height:44px}
  .drawer-actions .btn{width:100%}
  .cta-actions{flex-direction:column}
  .chip{height:38px;padding:0 15px;font-size:13.5px}
}
@media (max-width:479px){
  .page-hero h1{font-size:26px}
  .section-head h2{font-size:24px}
  .stat-num{font-size:38px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --ink-900:#16142B;
  --ink-700:#2A2748;
  --ink-500:#4A4766;
  --sand-050:#F6F4EF;
  --sand-100:#EDEAE2;
  --line:#DCD7CC;
  --accent:#3FC1B0;
  --accent-strong:#2AA495;
  --glow:#FFC46B;
  --text:#1E1C33;
  --text-muted:#6B6880;
  --danger:#C8462F;
  --success:#2F8F6B;
  --white:#FFFFFF;
  --radius-card:16px;
  --radius-img:12px;
  --radius-hero:20px;
  --shadow-1:0 1px 2px rgba(22,20,43,.06);
  --shadow-2:0 12px 32px -16px rgba(22,20,43,.16);
  --shadow-3:0 18px 44px -18px rgba(22,20,43,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-head:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--sand-050);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
::selection{background:rgba(63,193,176,.28);}

/* ---------- 容器 ---------- */
.grid-container{
  max-width:1180px;
  width:100%;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.section{padding:96px 0;}
.section--tight{padding-top:72px;}
.section--sand{background:var(--sand-100);}
.eyebrow{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--text-muted);
  margin-bottom:14px;
  display:block;
}
h1,h2,h3{font-family:var(--font-head);font-weight:600;letter-spacing:-.01em;line-height:1.2;color:var(--ink-900);}
h2{font-size:clamp(28px,3.4vw,40px);}
h3{font-size:clamp(20px,2vw,24px);}
.section-head{max-width:640px;margin-bottom:40px;}
.section-head p{color:var(--text-muted);margin-top:14px;font-size:16px;}
.section-head--row{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--accent-strong);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:transparent;border-color:var(--line);color:var(--ink-900);}
.btn-outline:hover{border-color:var(--accent);color:var(--accent-strong);transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--ink-900);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.link-arrow span{transition:transform .2s var(--ease);}
.link-arrow:hover{color:var(--accent-strong);border-bottom-color:var(--accent-strong);}
.link-arrow:hover span{transform:translateX(4px);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.92);
  backdrop-filter:saturate(150%) blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1);}
.header-inner{
  height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:26px;height:26px;flex-shrink:0;}
.brand-text{
  font-family:var(--font-head);font-size:18px;font-weight:600;color:var(--ink-900);letter-spacing:-.01em;
}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-link{
  position:relative;font-size:15px;color:var(--ink-500);padding:6px 0;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left center;transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--ink-900);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink-900);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:#fff;padding:0;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--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);}
.mobile-drawer{
  background:var(--ink-900);
  padding:20px 24px 28px;
  border-top:1px solid rgba(255,255,255,.14);
}
.mobile-drawer[hidden]{display:none;}
.mobile-drawer a{
  display:block;padding:14px 0;color:rgba(255,255,255,.82);font-size:16px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.mobile-drawer a.is-active{color:var(--accent);font-weight:600;}
.mobile-drawer .drawer-actions{display:flex;flex-direction:column;gap:12px;margin-top:20px;}
.mobile-drawer .btn-outline{border-color:rgba(255,255,255,.28);color:#fff;}
.mobile-drawer .btn-outline:hover{border-color:var(--accent);color:var(--accent);}

/* ---------- 窄带 Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--ink-900);
  padding:76px 0 80px;
  min-height:300px;
  display:flex;align-items:center;
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.36;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(22,20,43,.95) 0%,rgba(22,20,43,.74) 52%,rgba(22,20,43,.42) 100%);
}
.page-hero-inner{position:relative;z-index:2;}
.page-hero h1{
  color:#fff;
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.22;
  margin:16px 0 14px;
  max-width:760px;
}
.hero-sub{
  color:rgba(255,255,255,.74);
  font-size:17px;max-width:560px;
}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;
}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border-radius:999px;font-size:13px;
  border:1px solid rgba(255,255,255,.22);
  color:rgba(255,255,255,.82);
  background:rgba(255,255,255,.06);
}
.chip--active{border-color:var(--accent);color:var(--accent);background:rgba(63,193,176,.12);}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-muted);
}
.breadcrumb a{color:rgba(255,255,255,.72);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:rgba(255,255,255,.36);}
.breadcrumb .current{color:#fff;}
.page-hero-stars{position:absolute;inset:0;z-index:1;pointer-events:none;}
.star{
  position:absolute;width:4px;height:4px;border-radius:50%;
  background:var(--glow);opacity:.4;
  animation:twinkle 4.6s ease-in-out infinite;
}
.star-1{top:24%;left:58%;animation-delay:.2s;}
.star-2{top:62%;left:70%;animation-delay:1.1s;}
.star-3{top:36%;left:84%;animation-delay:2.2s;}
.star-4{top:74%;left:48%;animation-delay:.7s;}
.star-5{top:18%;left:72%;animation-delay:3s;}
@keyframes twinkle{0%,100%{opacity:.3;}50%{opacity:.7;}}

/* ---------- 三步流程 ---------- */
.steps{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  counter-reset:step;
}
.step{
  position:relative;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px 26px 26px;
  box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-3);}
.step-num{
  font-family:var(--font-num);
  font-size:36px;font-weight:600;color:var(--accent);
  line-height:1;display:block;margin-bottom:16px;
}
.step h3{margin-bottom:10px;}
.step p{color:var(--text-muted);font-size:15px;}

/* ---------- 帮助卡片网格（两列错落） ---------- */
.help-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.help-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 26px 24px;box-shadow:var(--shadow-1);
  display:flex;flex-direction:column;gap:12px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.help-card:nth-child(even){margin-top:40px;}
.help-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-3);border-color:#cfc9bb;}
.help-card h3{font-size:21px;}
.help-card p{color:var(--text-muted);font-size:15px;}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:8px;
  font-size:13px;background:var(--sand-100);color:var(--ink-700);font-weight:500;
  align-self:flex-start;
}
.badge--glow{background:var(--glow);color:#3B2A05;}
.help-card .link-arrow{margin-top:4px;}

/* ---------- FAQ ---------- */
.faq-list{
  max-width:900px;
  border-top:1px solid var(--line);
}
.faq-item{
  border-bottom:1px solid var(--line);
}
.faq-q{
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 4px;cursor:pointer;list-style:none;
  font-size:17px;font-weight:600;color:var(--ink-900);font-family:var(--font-body);
  transition:color .2s var(--ease);
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q:hover{color:var(--accent-strong);}
.faq-icon{
  flex-shrink:0;width:22px;height:22px;position:relative;margin-top:3px;
  transition:transform .22s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--accent);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-a{
  padding:0 40px 24px 4px;
  color:var(--ink-500);font-size:16px;line-height:1.85;
}

/* ---------- 表单区 ---------- */
.form-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:start;
}
.form-media{
  border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-2);background:linear-gradient(135deg,#2A2748,#16142B);
}
.form-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.form-aside p{color:var(--text-muted);margin-top:14px;}
.aside-list{margin-top:26px;border-top:1px solid var(--line);}
.aside-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-500);
}
.aside-list li strong{color:var(--ink-900);font-weight:600;min-width:76px;}
.help-form{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-2);
}
.field{margin-bottom:18px;}
.field label{
  display:block;font-size:14px;font-weight:600;color:var(--ink-700);margin-bottom:8px;
}
.field input,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:12px;
  padding:12px 14px;font-size:15px;font-family:var(--font-body);color:var(--text);
  background:var(--sand-050);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.field input{height:48px;padding:0 14px;}
.field textarea{min-height:132px;resize:vertical;line-height:1.75;}
.field input::placeholder,.field textarea::placeholder{color:#9C99AA;}
.field input:focus,.field textarea:focus{
  outline:none;background:#fff;border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(63,193,176,.18);
}
.field-error{
  display:none;font-size:12px;color:var(--danger);margin-top:6px;
}
.field.has-error input,.field.has-error textarea{
  border-color:var(--danger);background:#FDF4F2;
}
.field.has-error .field-error{display:block;}
.form-success{
  display:none;margin-top:16px;padding:12px 14px;border-radius:12px;
  background:rgba(47,143,107,.1);border:1px solid rgba(47,143,107,.35);
  color:var(--success);font-size:14px;
}
.form-success.is-visible{display:block;}
form.is-sent .field input,form.is-sent .field textarea{border-color:rgba(47,143,107,.5);}
.form-tip{font-size:12px;color:var(--text-muted);margin-top:14px;line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);color:rgba(255,255,255,.72);
  padding:72px 0 28px;margin-top:0;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:0;
}
.footer-col{padding:0 28px;border-left:1px solid rgba(255,255,255,.12);}
.footer-col:first-child{padding-left:0;border-left:none;}
.footer-col:last-child{padding-right:0;}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;
}
.footer-brand .brand-text{color:#fff;}
.footer-col p{font-size:14px;line-height:1.8;}
.footer-col h3{
  font-family:var(--font-body);font-size:14px;font-weight:600;color:#fff;
  margin-bottom:16px;letter-spacing:.02em;
}
.footer-col ul li{margin-bottom:10px;font-size:14px;}
.footer-col ul li a{transition:color .2s var(--ease);}
.footer-col ul li a:hover{color:#fff;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;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;}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .grid-container{padding-left:22px;padding-right:22px;}
  .nav-links,.header-actions{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{height:64px;}
  .section{padding:72px 0;}
  .page-hero{padding:60px 0 64px;min-height:260px;}
  .steps{grid-template-columns:1fr;gap:18px;}
  .help-grid{grid-template-columns:1fr;}
  .help-card:nth-child(even){margin-top:0;}
  .form-grid{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;row-gap:36px;}
  .footer-col{padding:0 0 0 24px;}
  .footer-col:nth-child(odd){padding-left:0;border-left:none;}
}
@media (max-width:767px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:28px;}
  .section-head--row{flex-direction:column;align-items:flex-start;gap:14px;}
  .btn{height:48px;width:100%;}
  .header-actions .btn{width:auto;}
  .hero-meta{margin-top:20px;}
  .page-hero h1{margin-top:12px;}
  .faq-q{font-size:16px;padding:18px 2px;}
  .faq-a{padding-right:12px;}
  .help-form{padding:22px;}
  .form-media img{aspect-ratio:4/3;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-col{padding:0;border-left:none;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:479px){
  h2{font-size:26px;}
  .step{padding:22px 20px;}
  .help-card{padding:22px 20px;}
  .page-hero{padding:48px 0 52px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}