/* roulang page: index */
:root{
  --bg: #f4f8fd;
  --bg-soft: #eef4fb;
  --surface: rgba(255,255,255,.92);
  --surface-strong: #ffffff;
  --surface-soft: #f7fbff;
  --line: #dbe5f1;
  --line-strong: #c8d6e6;
  --text: #16324a;
  --muted: #5e7287;
  --primary: #2f6fed;
  --primary-strong: #2458c3;
  --primary-soft: rgba(47,111,237,.12);
  --accent: #15a7c8;
  --accent-soft: rgba(21,167,200,.12);
  --success: #0fb27a;
  --warning: #f59f00;
  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --shadow-lg: 0 26px 60px rgba(31, 62, 116, .10);
  --shadow-md: 0 14px 38px rgba(31, 62, 116, .08);
  --shadow-sm: 0 8px 24px rgba(31, 62, 116, .06);
  --container: 1200px;
  --gap: 1.5rem;
  --gap-lg: 2.2rem;
  --section-space: 5rem;
}

*,
*::before,
*::after{
  box-sizing: border-box;
}

html{
  scroll-behavior: smooth;
}

body{
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 10%, rgba(47,111,237,.10), transparent 25%),
    radial-gradient(circle at 85% 0%, rgba(21,167,200,.10), transparent 22%),
    linear-gradient(180deg, #fbfdff 0%, var(--bg) 100%);
  font-family: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a{
  color: inherit;
  text-decoration: none;
  transition: color .24s ease, opacity .24s ease, transform .24s ease, box-shadow .24s ease, background-color .24s ease, border-color .24s ease;
}

a:hover{
  color: var(--primary-strong);
}

img{
  max-width: 100%;
  display: block;
}

button,
input,
select,
textarea{
  font: inherit;
}

::selection{
  background: rgba(47,111,237,.16);
  color: var(--text);
}

:focus-visible{
  outline: 3px solid rgba(47,111,237,.20);
  outline-offset: 3px;
}

.grid-container{
  max-width: var(--container);
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(250, 252, 255, .80);
  border-bottom: 1px solid rgba(219,229,241,.88);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 1rem;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  min-width: 0;
  color: var(--text);
}

.brand-badge{
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(135deg, rgba(47,111,237,1), rgba(21,167,200,1));
  color: #fff;
  font-weight: 800;
  letter-spacing: .02em;
  box-shadow: 0 10px 24px rgba(47,111,237,.22);
  flex: 0 0 auto;
}

.brand-text{
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-name{
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: .01em;
  line-height: 1.2;
  color: var(--text);
}

.brand-sub{
  font-size: .88rem;
  color: var(--muted);
  line-height: 1.2;
  margin-top: .15rem;
}

.top-nav{
  display: flex;
  align-items: center;
  gap: .75rem;
}

.top-link{
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .72rem 1rem;
  border: 1px solid rgba(219,229,241,.95);
  border-radius: 999px;
  background: rgba(255,255,255,.88);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.top-link:hover{
  transform: translateY(-1px);
  border-color: rgba(47,111,237,.22);
  box-shadow: 0 12px 28px rgba(31,62,116,.08);
}

.hero-section{
  position: relative;
  padding: 2.2rem 0 1rem;
  overflow: hidden;
}

.hero-section::before,
.hero-section::after{
  content: "";
  position: absolute;
  inset: auto;
  border-radius: 999px;
  pointer-events: none;
  filter: blur(4px);
  opacity: .75;
}

.hero-section::before{
  width: 16rem;
  height: 16rem;
  right: -6rem;
  top: 6%;
  background: radial-gradient(circle, rgba(47,111,237,.14) 0%, rgba(47,111,237,0) 70%);
}

.hero-section::after{
  width: 14rem;
  height: 14rem;
  left: -5rem;
  bottom: -2rem;
  background: radial-gradient(circle, rgba(21,167,200,.12) 0%, rgba(21,167,200,0) 72%);
}

.hero-grid{
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  gap: 1.4rem;
  align-items: stretch;
}

.hero-copy{
  position: relative;
  padding: 2.6rem 2.2rem 2.2rem;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(219,229,241,.94);
  background:
    linear-gradient(180deg, rgba(255,255,255,.95), rgba(247,251,255,.90));
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-copy::after{
  content: "";
  position: absolute;
  width: 18rem;
  height: 18rem;
  right: -7rem;
  top: -6rem;
  background: radial-gradient(circle, rgba(47,111,237,.10), rgba(47,111,237,0) 70%);
  pointer-events: none;
}

.hero-kicker{
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .4rem .75rem;
  border-radius: 999px;
  color: var(--primary-strong);
  background: rgba(47,111,237,.10);
  border: 1px solid rgba(47,111,237,.14);
  font-size: .94rem;
  font-weight: 700;
}

.hero-title{
  margin: 1rem 0 .9rem;
  font-size: clamp(2.2rem, 5vw, 4.25rem);
  line-height: 1.08;
  letter-spacing: -.03em;
  font-weight: 800;
  color: #10273c;
}

.hero-desc{
  max-width: 40rem;
  margin: 0;
  font-size: 1.03rem;
  color: var(--muted);
}

.hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.65rem;
}

.btn-ui{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: .82rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  line-height: 1;
  box-shadow: none;
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary{
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
  box-shadow: 0 16px 28px rgba(47,111,237,.22);
}

.btn-primary:hover{
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 18px 34px rgba(47,111,237,.28);
}

.btn-secondary{
  color: var(--primary-strong);
  background: rgba(47,111,237,.08);
  border-color: rgba(47,111,237,.15);
}

.btn-secondary:hover{
  transform: translateY(-2px);
  background: rgba(47,111,237,.12);
  border-color: rgba(47,111,237,.24);
}

.btn-ghost{
  color: var(--text);
  background: rgba(255,255,255,.72);
  border-color: rgba(219,229,241,.96);
}

.btn-ghost:hover{
  transform: translateY(-2px);
  border-color: rgba(47,111,237,.22);
  background: rgba(255,255,255,.94);
}

.hero-points{
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.5rem;
}

.hero-chip{
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .6rem .85rem;
  border-radius: 999px;
  background: rgba(255,255,255,.92);
  border: 1px solid rgba(219,229,241,.96);
  color: var(--muted);
  box-shadow: var(--shadow-sm);
  font-size: .92rem;
}

.hero-bento{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: minmax(162px, auto);
  gap: 1rem;
}

.hero-card{
  padding: 1.2rem 1.15rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(219,229,241,.95);
  background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(247,251,255,.92));
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.hero-card--wide{
  grid-column: 1 / -1;
  min-height: 230px;
  background:
    radial-gradient(circle at right top, rgba(47,111,237,.12), transparent 26%),
    linear-gradient(180deg, rgba(255,255,255,.98), rgba(245,249,255,.95));
}

.card-label{
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .82rem;
  font-weight: 700;
  color: var(--primary-strong);
  padding: .3rem .55rem;
  border-radius: 999px;
  background: rgba(47,111,237,.10);
  border: 1px solid rgba(47,111,237,.14);
}

.card-title{
  margin: .82rem 0 .35rem;
  font-size: 1.08rem;
  line-height: 1.35;
  font-weight: 800;
  color: #17324a;
}

.card-text{
  margin: 0;
  color: var(--muted);
  font-size: .96rem;
  line-height: 1.7;
}

.panel-list{
  list-style: none;
  margin: .95rem 0 0;
  padding: 0;
  display: grid;
  gap: .7rem;
}

.panel-list li{
  display: flex;
  align-items: flex-start;
  gap: .65rem;
  color: var(--text);
  font-size: .95rem;
}

.panel-dot{
  width: .7rem;
  height: .7rem;
  border-radius: 999px;
  margin-top: .42rem;
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 0 4px rgba(47,111,237,.10);
}

.panel-bar{
  margin-top: 1rem;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(47,111,237,.15), rgba(21,167,200,.15));
  overflow: hidden;
}

.panel-bar span{
  display: block;
  height: 100%;
  width: 74%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.panel-stats{
  display: grid;
  gap: .8rem;
}

.panel-stat{
  padding: .95rem 1rem;
  border-radius: 18px;
  background: rgba(255,255,255,.82);
  border: 1px solid rgba(219,229,241,.96);
}

.panel-stat strong{
  display: block;
  font-size: 1.28rem;
  line-height: 1.2;
  color: #11273a;
}

.panel-stat span{
  display: block;
  margin-top: .24rem;
  color: var(--muted);
  font-size: .88rem;
}

.pill-wrap{
  margin-top: 1rem;
  padding: .8rem;
  border-radius: 22px;
  border: 1px solid rgba(219,229,241,.96);
  background: rgba(255,255,255,.84);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.pill-scroll{
  display: flex;
  align-items: center;
  gap: .72rem;
  overflow-x: auto;
  padding-bottom: .15rem;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.pill-scroll::-webkit-scrollbar{
  display: none;
}

.pill-link{
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: .62rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(219,229,241,.96);
  background: rgba(248,251,255,.96);
  color: var(--text);
  font-size: .94rem;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(31,62,116,.04);
}

.pill-link:hover{
  color: var(--primary-strong);
  border-color: rgba(47,111,237,.24);
  transform: translateY(-1px);
}

.pill-link.is-active{
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  border-color: rgba(47,111,237,.24);
  box-shadow: 0 12px 24px rgba(47,111,237,.22);
}

.section{
  padding: var(--section-space) 0;
  scroll-margin-top: 96px;
}

.section--alt{
  background: linear-gradient(180deg, rgba(245,249,255,.64), rgba(240,246,252,.84));
  border-top: 1px solid rgba(219,229,241,.56);
  border-bottom: 1px solid rgba(219,229,241,.56);
}

.section-head{
  display: grid;
  gap: .8rem;
  margin-bottom: 1.6rem;
  max-width: 44rem;
}

.section-kicker{
  display: inline-flex;
  align-items: center;
  width: fit-content;
  gap: .4rem;
  padding: .36rem .68rem;
  border-radius: 999px;
  background: rgba(47,111,237,.10);
  border: 1px solid rgba(47,111,237,.14);
  color: var(--primary-strong);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .03em;
}

.section-title{
  margin: 0;
  font-size: clamp(1.55rem, 2.5vw, 2.35rem);
  line-height: 1.18;
  font-weight: 800;
  color: #13283b;
  letter-spacing: -.02em;
}

.section-desc{
  margin: 0;
  color: var(--muted);
  font-size: 1.01rem;
  line-height: 1.8;
}

.soft-card{
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(219,229,241,.95);
  background: rgba(255,255,255,.94);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.soft-card:hover{
  transform: translateY(-3px);
  box-shadow: 0 18px 44px rgba(31,62,116,.10);
}

.soft-card .card-inner{
  padding: 1.25rem 1.2rem;
}

.icon-circle{
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(47,111,237,.12), rgba(21,167,200,.12));
  color: var(--primary-strong);
  font-weight: 800;
  border: 1px solid rgba(47,111,237,.12);
}

.feature-grid{
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card{
  height: 100%;
}

.feature-card .card-inner{
  display: grid;
  gap: .85rem;
}

.feature-card h3{
  margin: 0;
  font-size: 1.04rem;
  line-height: 1.35;
  font-weight: 800;
}

.feature-card p{
  margin: 0;
  color: var(--muted);
  font-size: .94rem;
  line-height: 1.7;
}

.dual-grid{
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 1rem;
  align-items: stretch;
}

.solution-panel{
  padding: 1.5rem;
}

.solution-lead{
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.check-list{
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: .8rem;
}

.check-list li{
  display: flex;
  gap: .75rem;
  align-items: flex-start;
  color: var(--text);
  font-size: .96rem;
}

.check-mark{
  width: 24px;
  height: 24px;
  border-radius: 999px;
  display: inline-grid;
  place-items: center;
  background: rgba(15,178,122,.12);
  color: var(--success);
  border: 1px solid rgba(15,178,122,.14);
  flex: 0 0 auto;
  margin-top: .08rem;
  font-weight: 800;
  font-size: .84rem;
}

.stack-cards{
  display: grid;
  gap: 1rem;
}

.mini-card{
  padding: 1.1rem 1.15rem;
  border-radius: 22px;
  border: 1px solid rgba(219,229,241,.95);
  background:
    linear-gradient(180deg, rgba(255,255,255,.96), rgba(245,249,255,.92));
  box-shadow: var(--shadow-sm);
}

.mini-card strong{
  display: block;
  font-size: 1rem;
  line-height: 1.35;
  margin-bottom: .45rem;
  color: #10273c;
}

.mini-card span{
  display: block;
  color: var(--muted);
  font-size: .93rem;
  line-height: 1.75;
}

.metric-grid{
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.metric-card{
  padding: 1.35rem 1.2rem;
}

.metric-number{
  display: block;
  font-size: 2rem;
  line-height: 1;
  font-weight: 900;
  color: var(--primary-strong);
  letter-spacing: -.04em;
}

.metric-label{
  margin-top: .45rem;
  font-size: .95rem;
  font-weight: 800;
  color: #17324a;
}

.metric-desc{
  margin-top: .4rem;
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.72;
}

.progress-shell{
  padding: 1.45rem;
}

.progress-track{
  position: relative;
  margin-top: .9rem;
  height: 12px;
  border-radius: 999px;
  background: rgba(47,111,237,.10);
  overflow: hidden;
}

.progress-track span{
  display: block;
  width: 78%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.step-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.2rem;
}

.step-card{
  padding: 1.15rem 1.1rem;
}

.step-index{
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: rgba(47,111,237,.10);
  color: var(--primary-strong);
  font-weight: 800;
  font-size: .92rem;
  border: 1px solid rgba(47,111,237,.12);
}

.step-card h3{
  margin: .8rem 0 .35rem;
  font-size: 1.02rem;
  line-height: 1.35;
  font-weight: 800;
}

.step-card p{
  margin: 0;
  color: var(--muted);
  font-size: .94rem;
  line-height: 1.75;
}

.quote-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.quote-card{
  padding: 1.2rem;
}

.quote-top{
  display: flex;
  align-items: center;
  gap: .8rem;
  margin-bottom: .85rem;
}

.avatar{
  width: 44px;
  height: 44px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 10px 24px rgba(47,111,237,.18);
  flex: 0 0 auto;
}

.quote-name{
  font-weight: 800;
  color: #11273a;
  line-height: 1.25;
}

.quote-tag{
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.25;
  margin-top: .1rem;
}

.stars{
  display: inline-flex;
  gap: .18rem;
  color: #f0b429;
  font-size: .9rem;
  letter-spacing: .03em;
}

.quote-body{
  margin: 0;
  color: var(--text);
  font-size: .96rem;
  line-height: 1.82;
}

.topic-layout{
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: 1rem;
  align-items: start;
}

.topic-cloud{
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.topic-chip{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .7rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(219,229,241,.96);
  background: rgba(255,255,255,.90);
  color: var(--text);
  font-size: .94rem;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

.topic-chip:hover{
  transform: translateY(-2px);
  border-color: rgba(47,111,237,.20);
  color: var(--primary-strong);
}

.topic-grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.topic-card{
  padding: 1.2rem 1.15rem;
}

.topic-card .card-title{
  margin-top: .65rem;
}

.guide-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.guide-card{
  padding: 1.3rem 1.15rem;
}

.guide-card .step-index{
  width: 40px;
  height: 40px;
  border-radius: 14px;
}

.guide-card h3{
  margin: .85rem 0 .35rem;
  font-size: 1.04rem;
  line-height: 1.35;
  font-weight: 800;
}

.guide-card p{
  margin: 0;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.78;
}

.update-layout{
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(0, .97fr);
  gap: 1rem;
  align-items: start;
}

.update-list{
  display: grid;
  gap: 1rem;
}

.update-card-link{
  display: block;
  height: 100%;
}

.update-card{
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 1.15rem 1.15rem 1rem;
}

.update-meta{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .8rem;
  flex-wrap: wrap;
  margin-bottom: .7rem;
}

.badge{
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .36rem .6rem;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 800;
  color: var(--primary-strong);
  background: rgba(47,111,237,.10);
  border: 1px solid rgba(47,111,237,.14);
}

.update-time{
  color: var(--muted);
  font-size: .88rem;
}

.update-card h3{
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.45;
  font-weight: 800;
  color: #10273c;
}

.update-card p{
  margin: .55rem 0 0;
  color: var(--muted);
  font-size: .94rem;
  line-height: 1.72;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.update-card .card-foot{
  margin-top: auto;
  padding-top: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .8rem;
}

.update-link-text{
  color: var(--primary-strong);
  font-weight: 800;
  font-size: .92rem;
}

.empty-state{
  min-height: 240px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(219,229,241,.96);
  background: rgba(255,255,255,.76);
  color: var(--muted);
  box-shadow: var(--shadow-sm);
}

.faq-card{
  padding: 1.1rem 1rem;
}

.accordion{
  margin: 0;
  background: transparent;
}

.accordion-item{
  margin-bottom: .85rem;
  border: 1px solid rgba(219,229,241,.96);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background: rgba(255,255,255,.94);
}

.accordion-title{
  padding: 1rem 1.15rem;
  font-size: 1rem;
  font-weight: 800;
  color: #11273a;
  background: transparent;
  border: 0;
}

.accordion-title:hover{
  background: rgba(47,111,237,.04);
}

.accordion-title::before{
  right: 1.15rem;
  color: var(--primary-strong);
  margin-top: -.2rem;
}

.accordion-content{
  padding: 0 1.15rem 1.05rem;
  color: var(--muted);
  font-size: .96rem;
  line-height: 1.82;
  border-top: 0;
  background: transparent;
}

.cta-wrap{
  position: relative;
  padding-bottom: 1rem;
}

.cta-panel{
  padding: 1.65rem;
  border-radius: 28px;
  border: 1px solid rgba(219,229,241,.96);
  background:
    linear-gradient(135deg, rgba(47,111,237,.09), rgba(21,167,200,.07) 42%, rgba(255,255,255,.96) 100%);
  box-shadow: var(--shadow-lg);
}

.cta-panel .section-title{
  max-width: 28rem;
}

.cta-panel p{
  max-width: 40rem;
}

.cta-actions{
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 1.35rem;
}

.floating-rail{
  margin-top: 1rem;
  padding: .95rem 1rem;
  border-radius: 22px;
  border: 1px solid rgba(219,229,241,.96);
  background: rgba(255,255,255,.94);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.floating-rail strong{
  display: block;
  font-size: .98rem;
  color: #11273a;
}

.floating-rail span{
  display: block;
  color: var(--muted);
  font-size: .92rem;
}

.rail-actions{
  display: flex;
  align-items: center;
  gap: .7rem;
  flex-wrap: wrap;
}

.site-footer{
  padding: 2rem 0 2.8rem;
  background: linear-gradient(180deg, rgba(241,246,252,.78), rgba(239,244,251,.96));
  border-top: 1px solid rgba(219,229,241,.72);
}

.footer-inner{
  display: grid;
  gap: 1rem;
}

.footer-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-brand{
  display: inline-flex;
  align-items: center;
  gap: .8rem;
}

.footer-note{
  margin: 0;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.8;
}

.footer-meta{
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1rem;
  color: var(--muted);
  font-size: .92rem;
}

.footer-meta a{
  color: var(--primary-strong);
  font-weight: 700;
}

.link-line{
  display: inline-flex;
  align-items: center;
  gap: .28rem;
  color: var(--primary-strong);
  font-weight: 800;
}

.link-line:hover{
  transform: translateY(-1px);
}

.mobile-only{
  display: none;
}

@media (max-width: 1024px){
  :root{
    --section-space: 4.2rem;
  }

  .hero-grid,
  .dual-grid,
  .topic-layout,
  .update-layout{
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .metric-grid,
  .quote-grid,
  .guide-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-bento{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-card--wide{
    min-height: 210px;
  }

  .brand-sub{
    display: none;
  }
}

@media (max-width: 768px){
  :root{
    --section-space: 3.6rem;
  }

  .header-inner{
    min-height: 70px;
  }

  .hero-copy{
    padding: 1.8rem 1.35rem;
    border-radius: 24px;
  }

  .hero-title{
    font-size: clamp(1.95rem, 9vw, 2.95rem);
  }

  .hero-desc{
    font-size: .98rem;
  }

  .hero-bento{
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }

  .hero-card--wide{
    grid-column: auto;
  }

  .feature-grid,
  .metric-grid,
  .quote-grid,
  .guide-grid,
  .step-grid,
  .topic-grid{
    grid-template-columns: 1fr;
  }

  .section-head{
    margin-bottom: 1.25rem;
  }

  .pill-wrap{
    margin-top: .85rem;
  }

  .floating-rail{
    flex-direction: column;
    align-items: flex-start;
  }

  .rail-actions,
  .cta-actions,
  .hero-actions{
    width: 100%;
  }

  .btn-ui{
    width: 100%;
  }

  .top-nav{
    gap: .5rem;
  }
}

@media (max-width: 520px){
  .header-inner{
    gap: .6rem;
  }

  .brand-badge{
    width: 38px;
    height: 38px;
    border-radius: 13px;
  }

  .brand-name{
    font-size: .98rem;
  }

  .top-link{
    padding: .6rem .86rem;
  }

  .hero-copy{
    padding: 1.45rem 1rem;
  }

  .hero-kicker,
  .section-kicker,
  .badge,
  .card-label{
    font-size: .78rem;
  }

  .hero-chip{
    width: 100%;
    justify-content: flex-start;
  }

  .soft-card .card-inner,
  .metric-card,
  .guide-card,
  .step-card,
  .topic-card,
  .update-card,
  .quote-card,
  .mini-card,
  .solution-panel{
    padding: 1rem;
  }

  .accordion-title{
    padding: .95rem 1rem;
    font-size: .98rem;
  }

  .accordion-content{
    padding: 0 1rem 1rem;
  }

  .site-footer{
    padding-bottom: 4rem;
  }
}

a,
button,
.top-link,
.btn-ui,
.pill-link,
.topic-chip,
.soft-card,
.update-card-link,
.accordion-title{
  transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease, background-color .24s ease, color .24s ease, opacity .24s ease;
}

.soft-card:hover,
.update-card-link:hover .soft-card,
.topic-chip:hover,
.pill-link:hover,
.btn-ui:hover,
.top-link:hover{
  will-change: transform;
}

/* roulang page: article */
:root{
      --bg: #f4f8fd;
      --bg-soft: #eef4fb;
      --surface: rgba(255,255,255,.92);
      --surface-strong: #ffffff;
      --surface-soft: #f7fbff;
      --line: #dbe5f1;
      --line-strong: #c8d6e6;
      --text: #16324a;
      --muted: #5e7287;
      --primary: #2f6fed;
      --primary-strong: #2458c3;
      --primary-soft: rgba(47,111,237,.12);
      --accent: #15a7c8;
      --accent-soft: rgba(21,167,200,.12);
      --success: #0fb27a;
      --warning: #f59f00;
      --radius-xl: 30px;
      --radius-lg: 24px;
      --radius-md: 18px;
      --radius-sm: 14px;
      --shadow-lg: 0 26px 60px rgba(31, 62, 116, .10);
      --shadow-md: 0 14px 38px rgba(31, 62, 116, .08);
      --shadow-sm: 0 8px 24px rgba(31, 62, 116, .06);
      --container: 1200px;
      --gap: 1.5rem;
      --gap-lg: 2.2rem;
      --section-space: 3.8rem;
    }
    *{
      box-sizing: border-box;
    }
    html{
      scroll-behavior: smooth;
    }
    body{
      margin: 0;
      color: var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(47,111,237,.10), transparent 24%),
        radial-gradient(circle at 88% 0%, rgba(21,167,200,.11), transparent 20%),
        linear-gradient(180deg, #fbfdff 0%, var(--bg) 100%);
      font-family: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      line-height: 1.75;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img{
      max-width: 100%;
      display: block;
    }
    a{
      color: inherit;
      text-decoration: none;
      transition: color .24s ease, opacity .24s ease, transform .24s ease, box-shadow .24s ease, background-color .24s ease, border-color .24s ease;
    }
    a:hover{
      color: var(--primary-strong);
    }
    button,
    input,
    textarea,
    select{
      font: inherit;
    }
    ::selection{
      background: rgba(47,111,237,.16);
      color: var(--text);
    }
    .grid-container{
      max-width: var(--container);
      padding-left: 1rem;
      padding-right: 1rem;
    }
    .site-header{
      position: sticky;
      top: 0;
      z-index: 80;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      background: rgba(250, 252, 255, .82);
      border-bottom: 1px solid rgba(219,229,241,.88);
    }
    .header-inner{
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 76px;
      gap: 1rem;
    }
    .brand{
      display: inline-flex;
      align-items: center;
      gap: .8rem;
      min-width: 0;
      color: var(--text);
      flex: 0 1 auto;
    }
    .brand:hover{
      color: var(--text);
      transform: translateY(-1px);
    }
    .brand-badge{
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      color: #fff;
      font-weight: 800;
      letter-spacing: .02em;
      box-shadow: 0 10px 24px rgba(47,111,237,.22);
      flex: 0 0 auto;
    }
    .brand-text{
      display: flex;
      flex-direction: column;
      min-width: 0;
    }
    .brand-name{
      font-size: 1.02rem;
      font-weight: 800;
      letter-spacing: .01em;
      line-height: 1.2;
      color: var(--text);
    }
    .brand-sub{
      font-size: .88rem;
      color: var(--muted);
      line-height: 1.2;
      margin-top: .14rem;
    }
    .top-nav{
      display: flex;
      align-items: center;
      gap: .75rem;
      flex: 0 0 auto;
    }
    .top-link{
      position: relative;
      display: inline-flex;
      align-items: center;
      min-height: 42px;
      padding: .6rem 1rem;
      border-radius: 999px;
      color: var(--muted);
      background: rgba(255,255,255,.62);
      border: 1px solid rgba(219,229,241,.9);
      box-shadow: var(--shadow-sm);
      font-weight: 700;
      letter-spacing: .01em;
    }
    .top-link:hover,
    .top-link:focus-visible{
      color: var(--primary-strong);
      border-color: rgba(47,111,237,.22);
      transform: translateY(-1px);
      box-shadow: 0 10px 26px rgba(47,111,237,.10);
      outline: none;
    }
    .top-link[aria-current="page"],
    .top-link.is-active{
      color: #fff;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
      border-color: transparent;
      box-shadow: 0 12px 28px rgba(47,111,237,.22);
    }
    .page-wrap{
      position: relative;
      padding-bottom: 2.4rem;
    }
    .article-hero{
      position: relative;
      padding: 2.1rem 0 1.2rem;
      overflow: hidden;
      scroll-margin-top: 96px;
    }
    .article-hero::before,
    .article-hero::after{
      content: "";
      position: absolute;
      border-radius: 999px;
      pointer-events: none;
      filter: blur(4px);
      opacity: .8;
    }
    .article-hero::before{
      width: 18rem;
      height: 18rem;
      right: -6rem;
      top: 2%;
      background: radial-gradient(circle, rgba(47,111,237,.13) 0%, rgba(47,111,237,0) 70%);
    }
    .article-hero::after{
      width: 16rem;
      height: 16rem;
      left: -5rem;
      bottom: -2rem;
      background: radial-gradient(circle, rgba(21,167,200,.12) 0%, rgba(21,167,200,0) 72%);
    }
    .article-hero-grid{
      display: grid;
      grid-template-columns: minmax(0, 1.14fr) minmax(300px, .86fr);
      gap: 1.4rem;
      align-items: stretch;
    }
    .article-hero-copy,
    .article-hero-panel,
    .article-card,
    .side-card,
    .related-card,
    .faq-card,
    .cta-panel,
    .crumb-bar{
      border: 1px solid rgba(219,229,241,.96);
      background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(247,251,255,.90));
      box-shadow: var(--shadow-lg);
    }
    .article-hero-copy{
      position: relative;
      border-radius: var(--radius-xl);
      padding: 2.4rem 2.2rem 2.1rem;
      overflow: hidden;
    }
    .article-hero-copy::after{
      content: "";
      position: absolute;
      width: 20rem;
      height: 20rem;
      right: -8rem;
      top: -7rem;
      background: radial-gradient(circle, rgba(47,111,237,.10) 0%, rgba(47,111,237,0) 68%);
      pointer-events: none;
    }
    .hero-kicker{
      display: inline-flex;
      align-items: center;
      gap: .45rem;
      padding: .4rem .78rem;
      border-radius: 999px;
      color: var(--primary-strong);
      background: rgba(47,111,237,.10);
      border: 1px solid rgba(47,111,237,.14);
      font-size: .94rem;
      font-weight: 700;
      letter-spacing: .01em;
    }
    .article-title{
      margin: 1rem 0 .9rem;
      font-size: clamp(2.05rem, 4.8vw, 4.1rem);
      line-height: 1.1;
      letter-spacing: -.03em;
      font-weight: 800;
      color: #10273c;
    }
    .article-lead{
      max-width: 45rem;
      margin: 0;
      font-size: 1.03rem;
      line-height: 1.9;
      color: var(--muted);
    }
    .hero-actions{
      display: flex;
      flex-wrap: wrap;
      gap: .8rem;
      margin-top: 1.65rem;
    }
    .btn-ui{
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: .82rem 1.2rem;
      border-radius: 999px;
      border: 1px solid transparent;
      font-weight: 700;
      line-height: 1;
      white-space: nowrap;
      cursor: pointer;
      transition: transform .24s ease, box-shadow .24s ease, background-color .24s ease, border-color .24s ease, color .24s ease;
    }
    .btn-ui:hover,
    .btn-ui:focus-visible{
      transform: translateY(-2px);
      outline: none;
    }
    .btn-primary{
      color: #fff;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
      box-shadow: 0 16px 28px rgba(47,111,237,.22);
    }
    .btn-primary:hover,
    .btn-primary:focus-visible{
      color: #fff;
      box-shadow: 0 18px 34px rgba(47,111,237,.28);
    }
    .btn-secondary{
      color: var(--primary-strong);
      background: rgba(47,111,237,.08);
      border-color: rgba(47,111,237,.15);
    }
    .btn-secondary:hover,
    .btn-secondary:focus-visible{
      color: var(--primary-strong);
      background: rgba(47,111,237,.12);
      border-color: rgba(47,111,237,.24);
    }
    .hero-chips{
      display: flex;
      flex-wrap: wrap;
      gap: .7rem;
      margin-top: 1.5rem;
    }
    .hero-chip,
    .tag-pill,
    .mini-pill{
      display: inline-flex;
      align-items: center;
      gap: .45rem;
      padding: .62rem .85rem;
      border-radius: 999px;
      background: rgba(255,255,255,.92);
      border: 1px solid rgba(219,229,241,.96);
      color: var(--muted);
      box-shadow: var(--shadow-sm);
      font-size: .92rem;
    }
    .hero-chip strong,
    .tag-pill strong,
    .mini-pill strong{
      color: var(--text);
      font-weight: 700;
    }
    .article-hero-panel{
      position: relative;
      border-radius: var(--radius-xl);
      padding: 1rem;
      overflow: hidden;
    }
    .hero-poster{
      position: relative;
      min-height: 100%;
      aspect-ratio: 5 / 7;
      border-radius: calc(var(--radius-xl) - 4px);
      overflow: hidden;
      background:
        linear-gradient(180deg, rgba(255,255,255,.12), rgba(255,255,255,.04)),
        linear-gradient(135deg, rgba(47,111,237,.96) 0%, rgba(21,167,200,.92) 100%);
      box-shadow: 0 28px 54px rgba(47,111,237,.24);
      transform: translateY(6px) rotate(1.1deg);
      isolation: isolate;
    }
    .hero-poster::before,
    .hero-poster::after{
      content: "";
      position: absolute;
      border-radius: 999px;
      pointer-events: none;
    }
    .hero-poster::before{
      inset: 10% auto auto -15%;
      width: 56%;
      height: 56%;
      background: radial-gradient(circle, rgba(255,255,255,.24), rgba(255,255,255,0) 68%);
      filter: blur(2px);
    }
    .hero-poster::after{
      inset: auto -10% -14% auto;
      width: 48%;
      height: 48%;
      background: radial-gradient(circle, rgba(255,255,255,.18), rgba(255,255,255,0) 68%);
    }
    .poster-inner{
      position: relative;
      z-index: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
      padding: 1.2rem;
      color: #fff;
    }
    .poster-top{
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: .8rem;
    }
    .poster-brand{
      display: inline-flex;
      align-items: center;
      gap: .6rem;
      min-width: 0;
    }
    .poster-badge{
      width: 38px;
      height: 38px;
      border-radius: 13px;
      display: grid;
      place-items: center;
      background: rgba(255,255,255,.18);
      border: 1px solid rgba(255,255,255,.26);
      font-weight: 800;
    }
    .poster-brand span{
      display: block;
      line-height: 1.2;
    }
    .poster-brand strong{
      font-size: .98rem;
      letter-spacing: .01em;
    }
    .poster-brand small{
      color: rgba(255,255,255,.8);
      font-size: .84rem;
    }
    .poster-badge-line{
      display: inline-flex;
      align-items: center;
      padding: .36rem .68rem;
      border-radius: 999px;
      background: rgba(255,255,255,.16);
      border: 1px solid rgba(255,255,255,.2);
      font-size: .84rem;
      font-weight: 700;
    }
    .poster-card{
      display: grid;
      gap: .95rem;
      align-content: end;
      margin-top: auto;
      padding: 1rem;
      border-radius: 22px;
      background: rgba(255,255,255,.12);
      border: 1px solid rgba(255,255,255,.16);
      backdrop-filter: blur(10px);
    }
    .poster-card strong{
      display: block;
      font-size: 1.32rem;
      line-height: 1.25;
      margin-bottom: .4rem;
    }
    .poster-card p{
      margin: 0;
      color: rgba(255,255,255,.88);
      line-height: 1.8;
      font-size: .94rem;
    }
    .poster-metrics{
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: .7rem;
    }
    .poster-metric{
      padding: .75rem .7rem;
      border-radius: 18px;
      background: rgba(255,255,255,.14);
      border: 1px solid rgba(255,255,255,.16);
      text-align: center;
    }
    .poster-metric b{
      display: block;
      font-size: 1.15rem;
      line-height: 1.2;
      margin-bottom: .1rem;
    }
    .poster-metric span{
      font-size: .82rem;
      color: rgba(255,255,255,.82);
    }
    .section-wrap{
      padding: var(--section-space) 0 0;
    }
    .crumb-bar{
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: .5rem .75rem;
      padding: .9rem 1.05rem;
      border-radius: 20px;
      margin-bottom: 1rem;
      color: var(--muted);
    }
    .crumb-bar a{
      color: var(--primary-strong);
      font-weight: 700;
    }
    .crumb-bar .divider{
      color: #95a7ba;
    }
    .content-grid{
      display: grid;
      grid-template-columns: minmax(0, 1.48fr) minmax(280px, .62fr);
      gap: 1.2rem;
      align-items: start;
    }
    .article-card{
      border-radius: var(--radius-xl);
      padding: 1.35rem 1.35rem 1.5rem;
      overflow: hidden;
    }
    .article-body{
      font-size: 1.06rem;
      line-height: 1.95;
      color: var(--text);
      word-break: break-word;
    }
    .article-body > :first-child{
      margin-top: 0;
    }
    .article-body > :last-child{
      margin-bottom: 0;
    }
    .article-body h2,
    .article-body h3,
    .article-body h4{
      color: #12324b;
      line-height: 1.28;
      letter-spacing: -.01em;
      margin: 2rem 0 1rem;
    }
    .article-body h2{
      font-size: clamp(1.32rem, 2vw, 1.82rem);
    }
    .article-body h3{
      font-size: clamp(1.14rem, 1.6vw, 1.42rem);
    }
    .article-body p{
      margin: 0 0 1.1rem;
      color: #254055;
    }
    .article-body a{
      color: var(--primary-strong);
      text-decoration: none;
      border-bottom: 1px solid rgba(47,111,237,.22);
    }
    .article-body a:hover{
      color: var(--primary);
      border-bottom-color: rgba(47,111,237,.42);
    }
    .article-body ul,
    .article-body ol{
      margin: 0 0 1.15rem 1.25rem;
      padding: 0;
      color: #254055;
    }
    .article-body li{
      margin: .45rem 0;
    }
    .article-body blockquote{
      margin: 1.3rem 0;
      padding: 1rem 1.15rem;
      border-left: 4px solid var(--primary);
      background: rgba(47,111,237,.06);
      color: #27435a;
      border-radius: 0 16px 16px 0;
    }
    .article-body figure{
      margin: 1.5rem 0;
    }
    .article-body figcaption{
      margin-top: .55rem;
      color: var(--muted);
      font-size: .92rem;
      text-align: center;
    }
    .article-body img{
      border-radius: 18px;
      box-shadow: var(--shadow-md);
      margin: .2rem 0;
    }
    .article-body table{
      width: 100%;
      border-collapse: collapse;
      margin: 1.35rem 0;
      background: #fff;
      border-radius: 18px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: block;
      overflow-x: auto;
    }
    .article-body table thead th{
      background: rgba(47,111,237,.08);
      color: #11324c;
      font-weight: 700;
    }
    .article-body table th,
    .article-body table td{
      padding: .82rem .95rem;
      border-bottom: 1px solid rgba(219,229,241,.9);
      text-align: left;
      white-space: nowrap;
    }
    .article-body code{
      padding: .14rem .38rem;
      border-radius: 8px;
      background: rgba(47,111,237,.08);
      color: #234e9f;
      font-size: .94em;
    }
    .article-body pre{
      margin: 1.2rem 0;
      padding: 1rem 1.05rem;
      overflow: auto;
      background: #0f1c2c;
      color: #e8f2ff;
      border-radius: 18px;
      box-shadow: var(--shadow-sm);
    }
    .article-body pre code{
      padding: 0;
      background: transparent;
      color: inherit;
    }
    .side-stack{
      display: grid;
      gap: 1rem;
    }
    .side-card{
      border-radius: 22px;
      padding: 1rem 1rem 1.05rem;
    }
    .side-head{
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: .75rem;
      margin-bottom: .85rem;
    }
    .side-title{
      font-size: 1.02rem;
      font-weight: 800;
      letter-spacing: .01em;
      margin: 0;
      color: #11324c;
    }
    .side-badge{
      display: inline-flex;
      align-items: center;
      gap: .35rem;
      padding: .32rem .6rem;
      border-radius: 999px;
      font-size: .82rem;
      color: var(--primary-strong);
      background: rgba(47,111,237,.1);
      border: 1px solid rgba(47,111,237,.14);
      white-space: nowrap;
    }
    .side-list{
      display: grid;
      gap: .75rem;
      margin: 0;
      padding: 0;
      list-style: none;
    }
    .side-list li{
      display: flex;
      align-items: flex-start;
      gap: .7rem;
      color: #345166;
    }
    .side-list li::before{
      content: "";
      width: 9px;
      height: 9px;
      flex: 0 0 auto;
      margin-top: .52rem;
      border-radius: 999px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow: 0 0 0 4px rgba(47,111,237,.08);
    }
    .meta-grid{
      display: grid;
      gap: .7rem;
    }
    .meta-row{
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 1rem;
      padding: .78rem .85rem;
      border-radius: 16px;
      background: var(--surface-soft);
      border: 1px solid rgba(219,229,241,.9);
    }
    .meta-row span{
      color: var(--muted);
      flex: 0 0 auto;
      font-size: .92rem;
    }
    .meta-row strong{
      color: var(--text);
      text-align: right;
      font-weight: 700;
      min-width: 0;
    }
    .tag-cloud{
      display: flex;
      flex-wrap: wrap;
      gap: .6rem;
      margin-top: .2rem;
    }
    .tag-pill{
      background: rgba(47,111,237,.07);
      border-color: rgba(47,111,237,.12);
      color: #355b80;
    }
    .quick-links{
      display: grid;
      gap: .7rem;
    }
    .quick-link{
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: .85rem;
      padding: .85rem .95rem;
      border-radius: 16px;
      background: #fff;
      border: 1px solid rgba(219,229,241,.94);
      color: var(--text);
    }
    .quick-link:hover{
      color: var(--primary-strong);
      border-color: rgba(47,111,237,.22);
      transform: translateY(-1px);
      box-shadow: var(--shadow-sm);
    }
    .quick-link small{
      color: var(--muted);
    }
    .reading-notes{
      margin: 0;
      padding-left: 1.05rem;
      color: #36556e;
    }
    .reading-notes li{
      margin: .45rem 0;
    }
    .related-section,
    .faq-section,
    .cta-section{
      padding: var(--section-space) 0 0;
    }
    .section-head{
      margin-bottom: 1.1rem;
    }
    .section-kicker{
      display: inline-flex;
      align-items: center;
      gap: .45rem;
      padding: .4rem .74rem;
      border-radius: 999px;
      color: var(--primary-strong);
      background: rgba(47,111,237,.10);
      border: 1px solid rgba(47,111,237,.14);
      font-size: .92rem;
      font-weight: 700;
    }
    .section-title{
      margin: .8rem 0 .35rem;
      font-size: clamp(1.48rem, 2.6vw, 2.1rem);
      line-height: 1.22;
      letter-spacing: -.02em;
      color: #11324c;
      font-weight: 800;
    }
    .section-desc{
      margin: 0;
      color: var(--muted);
      max-width: 44rem;
    }
    .related-grid{
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 1rem;
    }
    .related-card{
      display: flex;
      flex-direction: column;
      gap: .65rem;
      min-height: 100%;
      padding: 1.05rem 1.05rem 1rem;
      border-radius: 22px;
      position: relative;
      overflow: hidden;
    }
    .related-card::after{
      content: "";
      position: absolute;
      inset: auto -12% -12% auto;
      width: 8rem;
      height: 8rem;
      background: radial-gradient(circle, rgba(47,111,237,.12), rgba(47,111,237,0) 68%);
      pointer-events: none;
    }
    .related-card .related-kicker{
      display: inline-flex;
      align-items: center;
      align-self: flex-start;
      padding: .32rem .6rem;
      border-radius: 999px;
      color: var(--primary-strong);
      background: rgba(47,111,237,.10);
      border: 1px solid rgba(47,111,237,.14);
      font-size: .82rem;
      font-weight: 700;
    }
    .related-card strong{
      font-size: 1.08rem;
      line-height: 1.35;
      color: #11324c;
    }
    .related-card p{
      margin: 0;
      color: var(--muted);
      line-height: 1.8;
      flex: 1 1 auto;
    }
    .related-card .card-action{
      color: var(--primary-strong);
      font-weight: 700;
    }
    .faq-list{
      display: grid;
      gap: .85rem;
    }
    .faq-card{
      border-radius: 22px;
      overflow: hidden;
    }
    .faq-card details{
      padding: 0;
    }
    .faq-card summary{
      list-style: none;
      cursor: pointer;
      padding: 1rem 1.05rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      font-weight: 800;
      color: #12324b;
      outline: none;
    }
    .faq-card summary::-webkit-details-marker{
      display: none;
    }
    .faq-card summary::after{
      content: "+";
      width: 30px;
      height: 30px;
      display: grid;
      place-items: center;
      border-radius: 999px;
      background: rgba(47,111,237,.08);
      color: var(--primary-strong);
      flex: 0 0 auto;
      transition: transform .24s ease, background-color .24s ease;
    }
    .faq-card[open] summary::after{
      content: "–";
      background: rgba(47,111,237,.12);
    }
    .faq-answer{
      padding: 0 1.05rem 1.05rem;
      color: var(--muted);
      line-height: 1.9;
    }
    .faq-answer p{
      margin: 0;
    }
    .cta-panel{
      border-radius: var(--radius-xl);
      overflow: hidden;
      padding: 1.35rem 1.35rem 1.3rem;
      background:
        radial-gradient(circle at 10% 10%, rgba(47,111,237,.12), transparent 32%),
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,255,.92));
    }
    .cta-grid{
      display: grid;
      grid-template-columns: minmax(0, 1.2fr) auto;
      gap: 1rem;
      align-items: center;
    }
    .cta-title{
      margin: 0 0 .35rem;
      font-size: clamp(1.38rem, 2.4vw, 2rem);
      line-height: 1.22;
      letter-spacing: -.02em;
      font-weight: 800;
      color: #11324c;
    }
    .cta-desc{
      margin: 0;
      color: var(--muted);
      max-width: 48rem;
    }
    .cta-actions{
      display: flex;
      flex-wrap: wrap;
      gap: .8rem;
      justify-content: flex-end;
    }
    .cta-ghost{
      color: var(--primary-strong);
      background: rgba(47,111,237,.08);
      border: 1px solid rgba(47,111,237,.14);
    }
    .cta-ghost:hover,
    .cta-ghost:focus-visible{
      color: var(--primary-strong);
      background: rgba(47,111,237,.12);
      border-color: rgba(47,111,237,.24);
    }
    .empty-state{
      display: grid;
      place-items: center;
      min-height: 280px;
      text-align: center;
      padding: 1.4rem;
      border-radius: 22px;
      background:
        radial-gradient(circle at top, rgba(47,111,237,.08), transparent 42%),
        rgba(247,251,255,.95);
      border: 1px dashed rgba(47,111,237,.18);
    }
    .empty-state h2{
      margin: 0 0 .6rem;
      font-size: 1.55rem;
      line-height: 1.25;
      color: #12324b;
    }
    .empty-state p{
      margin: 0 0 1rem;
      color: var(--muted);
    }
    .empty-state .btn-ui{
      min-width: 160px;
    }
    .site-footer{
      margin-top: var(--section-space);
      padding: 1.6rem 0 2rem;
      border-top: 1px solid rgba(219,229,241,.9);
      background: rgba(250,252,255,.7);
    }
    .footer-inner{
      display: grid;
      gap: 1rem;
    }
    .footer-top{
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .footer-brand{
      flex: 0 1 auto;
    }
    .link-line{
      color: var(--primary-strong);
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: .35rem;
    }
    .link-line:hover{
      color: var(--primary);
    }
    .footer-note{
      margin: 0;
      color: var(--muted);
      line-height: 1.85;
    }
    .footer-meta{
      display: flex;
      flex-wrap: wrap;
      gap: .75rem 1rem;
      color: #7a8da2;
      font-size: .92rem;
    }
    .footer-meta span{
      display: inline-flex;
      align-items: center;
      gap: .45rem;
    }
    .footer-meta span + span::before{
      content: "·";
      color: #a2b3c4;
      margin-right: 1rem;
      display: none;
    }
    .focusable:focus-visible,
    a:focus-visible,
    summary:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible{
      outline: 3px solid rgba(47,111,237,.22);
      outline-offset: 2px;
    }
    @media (max-width: 1100px){
      .article-hero-grid{
        grid-template-columns: minmax(0, 1fr);
      }
      .article-hero-panel{
        padding: 0;
      }
      .hero-poster{
        aspect-ratio: 16 / 10;
        transform: none;
      }
      .content-grid{
        grid-template-columns: minmax(0, 1fr);
      }
      .related-grid{
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
      .cta-grid{
        grid-template-columns: 1fr;
      }
      .cta-actions{
        justify-content: flex-start;
      }
    }
    @media (max-width: 768px){
      .header-inner{
        min-height: 70px;
      }
      .brand-badge{
        width: 38px;
        height: 38px;
        border-radius: 12px;
      }
      .brand-name{
        font-size: .98rem;
      }
      .brand-sub{
        font-size: .82rem;
      }
      .top-link{
        min-height: 40px;
        padding: .55rem .9rem;
      }
      .article-hero{
        padding-top: 1.5rem;
      }
      .article-hero-copy,
      .article-card,
      .side-card,
      .cta-panel,
      .related-card,
      .faq-card{
        border-radius: 20px;
      }
      .article-hero-copy{
        padding: 1.6rem 1.2rem 1.3rem;
      }
      .article-title{
        font-size: clamp(1.72rem, 7vw, 2.5rem);
      }
      .hero-actions{
        gap: .7rem;
      }
      .btn-ui{
        min-height: 44px;
        padding: .74rem 1rem;
      }
      .poster-metrics{
        grid-template-columns: 1fr;
      }
      .related-grid{
        grid-template-columns: 1fr;
      }
      .section-wrap,
      .related-section,
      .faq-section,
      .cta-section{
        padding-top: 2.8rem;
      }
      .article-body{
        font-size: 1.02rem;
      }
    }
    @media (max-width: 520px){
      .grid-container{
        padding-left: .82rem;
        padding-right: .82rem;
      }
      .header-inner{
        gap: .75rem;
      }
      .top-nav{
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
        max-width: 42%;
        padding-bottom: .2rem;
      }
      .top-nav::-webkit-scrollbar{
        display: none;
      }
      .article-hero-copy{
        padding: 1.35rem 1rem 1.1rem;
      }
      .hero-actions,
      .hero-chips,
      .cta-actions{
        flex-direction: column;
        align-items: stretch;
      }
      .btn-ui{
        width: 100%;
      }
      .crumb-bar{
        padding: .85rem .92rem;
      }
      .article-card{
        padding: 1rem 1rem 1.1rem;
      }
      .side-card{
        padding: .95rem .95rem 1rem;
      }
      .meta-row{
        padding: .72rem .75rem;
      }
      .faq-card summary{
        padding: .95rem .95rem;
      }
      .faq-answer{
        padding: 0 .95rem .95rem;
      }
      .site-footer{
        padding: 1.3rem 0 1.7rem;
      }
    }