/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --c-bg: #F5F2EB;
  --c-surface: #FFFFFF;
  --c-ink: #1A1816;
  --c-muted: #6F6A5E;
  --c-line: rgba(26, 24, 22, .12);
  --c-accent: #D98E32;
  --c-accent-strong: #BF6F1C;
  --c-on-accent: #1A1816;
  --c-dark-block: #121110;
  --c-on-dark: #F5F2EB;
  --c-on-dark-muted: #A9A193;
  --radius-btn: 6px;
  --radius-card: 12px;
  --radius-img: 8px;
  --shadow-1: 0 1px 2px rgba(18,17,16,.05);
  --shadow-2: 0 8px 24px rgba(18,17,16,.08);
  --shadow-3: 0 16px 40px rgba(18,17,16,.12);
  --header-h: 72px;
  --header-h-s: 56px;
  --font-main: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

/* ========== Base / Reset ========== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background-color: var(--c-bg);
  color: var(--c-ink);
  line-height: 1.65;
  margin: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease, border-color .2s ease, background-color .2s ease; }
a:hover { color: var(--c-accent-strong); }
button { font-family: inherit; }
input, textarea, select { font-family: inherit; }
h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 .5em;
  text-wrap: balance;
}
p { margin: 0 0 1em; text-align: left; }
.container { max-width: 1200px; }
.section { padding: clamp(64px, 9vw, 112px) 0; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent-strong);
  margin-bottom: 16px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--c-accent);
  display: inline-block;
  border-radius: 2px;
}
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); margin-bottom: 12px; }
.section-head p { color: var(--c-muted); max-width: 640px; }
.section-head-line {
  width: 40px;
  height: 3px;
  background: var(--c-accent);
  border: none;
  margin: 24px 0 0;
  opacity: 1;
}

/* ========== Bootstrap 重写 ========== */
.btn {
  border-radius: var(--radius-btn);
  font-weight: 600;
  padding: 0 24px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  transition: all .2s ease;
  font-size: .95rem;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}
.btn-accent {
  background: var(--c-accent);
  color: var(--c-on-accent);
  border-color: var(--c-accent);
}
.btn-accent:hover {
  background: var(--c-accent-strong);
  border-color: var(--c-accent-strong);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-3);
}
.btn-accent:active {
  transform: translateY(1px) scale(.995);
  box-shadow: var(--shadow-1);
}
.btn-ghost {
  background: transparent;
  color: var(--c-on-dark);
  border: 1px solid rgba(245,242,235,.35);
}
.btn-ghost:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  transform: translateY(-1px);
}
.btn-ghost-light {
  background: transparent;
  color: var(--c-ink);
  border: 1px solid var(--c-line);
}
.btn-ghost-light:hover {
  border-color: var(--c-accent);
  color: var(--c-accent-strong);
}
.btn-lg { height: 52px; padding: 0 32px; font-size: 1rem; }
.btn-sm { height: 36px; padding: 0 16px; font-size: .85rem; }

.navbar { padding: 0; }
.card {
  border-radius: var(--radius-card);
  border: 1px solid var(--c-line);
  background: var(--c-surface);
  box-shadow: var(--shadow-1);
}
.form-control, .form-select {
  border-radius: var(--radius-btn);
  border: 1px solid var(--c-line);
  height: 44px;
  font-size: .95rem;
  background-color: var(--c-surface);
  color: var(--c-ink);
  padding: 0 16px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-control:focus, .form-select:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(217,142,50,.18);
  color: var(--c-ink);
}
.form-control::placeholder { color: #9C958A; }

.accordion { --bs-accordion-bg: transparent; --bs-accordion-border-width: 0; --bs-accordion-btn-focus-box-shadow: none; --bs-accordion-active-bg: transparent; --bs-accordion-active-color: var(--c-accent-strong); }
.accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--c-line);
  border-radius: 0 !important;
}
.accordion-button {
  background: transparent;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--c-ink);
  padding: 20px 0;
  box-shadow: none !important;
  border-radius: 0 !important;
}
.accordion-button:hover { color: var(--c-accent-strong); }
.accordion-button:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }
.accordion-button:not(.collapsed) { color: var(--c-accent-strong); background: transparent; }
.accordion-button::after {
  background-image: none;
  content: "";
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--c-ink);
  border-bottom: 2px solid var(--c-ink);
  transform: rotate(45deg);
  transition: transform .25s ease;
  opacity: .55;
}
.accordion-button:not(.collapsed)::after {
  background-image: none;
  transform: rotate(225deg);
  border-color: var(--c-accent-strong);
}
.accordion-body { padding: 0 0 20px; color: var(--c-muted); line-height: 1.75; }

/* ========== Header ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1080;
  height: var(--header-h);
  background: rgba(245,242,235,.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: height .3s ease, background .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.site-header.scrolled {
  height: var(--header-h-s);
  background: rgba(245,242,235,.92);
  box-shadow: var(--shadow-2);
  border-bottom: 1px solid var(--c-line);
}
.site-header .container { height: 100%; }
.site-header .navbar { height: 100%; }
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  margin: 0;
  color: var(--c-ink) !important;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--c-accent);
}
.brand-text { font-size: 1.25rem; font-weight: 800; letter-spacing: -.01em; }
.brand-tag {
  font-size: 11px;
  font-weight: 700;
  background: var(--c-accent);
  color: var(--c-on-accent);
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: .04em;
  transform: translateY(-2px);
}
.navbar-nav { gap: 4px; }
.navbar-nav .nav-link {
  font-size: .95rem;
  font-weight: 500;
  color: var(--c-ink);
  padding: 8px 16px !important;
  border-radius: 6px;
  position: relative;
  transition: color .2s ease, background-color .2s ease;
}
.navbar-nav .nav-link:hover { color: var(--c-accent-strong); background: rgba(217,142,50,.06); }
.navbar-nav .nav-link.active { font-weight: 700; color: var(--c-ink); }
.navbar-nav .nav-link.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background: var(--c-accent);
  border-radius: 2px;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-search { position: relative; display: flex; align-items: center; }
.search-toggle {
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  color: var(--c-ink);
  font-size: 1.15rem;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color .2s ease, background .2s ease;
}
.search-toggle:hover { color: var(--c-accent-strong); background: rgba(217,142,50,.08); }
.search-toggle:focus-visible { outline: 2px solid var(--c-accent); outline-offset: -2px; }
.search-form {
  position: absolute;
  right: 40px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  opacity: 0;
  overflow: hidden;
  transition: width .3s ease, opacity .2s ease;
}
.search-form.open { width: 220px; opacity: 1; }
.search-form input {
  width: 100%;
  height: 40px;
  border: 1px solid var(--c-line);
  border-left: none;
  background: var(--c-surface);
  padding: 0 12px 0 12px;
  border-radius: 0 6px 6px 0;
  font-size: .9rem;
}
.search-form input:focus { outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(217,142,50,.16); }
.nav-login {
  font-size: .95rem;
  font-weight: 500;
  color: var(--c-ink);
  padding: 8px 12px;
  border-radius: 6px;
}
.nav-login:hover { color: var(--c-accent-strong); background: rgba(217,142,50,.06); }
.navbar-toggler {
  border: none;
  padding: 8px 10px;
  color: var(--c-ink);
  font-size: 1.4rem;
  box-shadow: none !important;
  border-radius: 6px;
}
.navbar-toggler:hover { background: rgba(217,142,50,.08); }
.navbar-toggler:focus { box-shadow: none; }
.navbar-toggler:focus-visible { outline: 2px solid var(--c-accent); }
.mobile-search input {
  width: 100%;
  height: 44px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-btn);
  padding: 0 16px;
  background: var(--c-surface);
  font-size: .95rem;
}
.mobile-search input:focus { outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(217,142,50,.16); }

/* ========== Hero ========== */
.hero {
  position: relative;
  background: linear-gradient(85deg, rgba(18,17,16,.95) 0%, rgba(18,17,16,.88) 50%, rgba(18,17,16,.78) 100%), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  background-color: var(--c-dark-block);
  color: var(--c-on-dark);
  padding: calc(var(--header-h) + clamp(56px, 8vw, 100px)) 0 clamp(56px, 7vw, 90px);
  overflow: hidden;
}
.hero-waves {
  position: absolute;
  right: 5%;
  bottom: 40px;
  display: flex;
  gap: 6px;
  z-index: 1;
  opacity: .3;
  pointer-events: none;
}
.hero-waves span {
  display: block;
  width: 2px;
  border-radius: 2px;
  background: var(--c-accent);
  height: calc(8px + (var(--i) * 5px));
  animation: heroWave .8s ease-in-out infinite alternate;
  animation-delay: calc((var(--i) * -0.08s));
}
@keyframes heroWave {
  from { transform: scaleY(.45); transform-origin: bottom; }
  to { transform: scaleY(1.15); transform-origin: bottom; }
}
.hero .container { position: relative; z-index: 2; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-accent);
  background: rgba(217,142,50,.12);
  border: 1px solid rgba(217,142,50,.25);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4.2rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -.02em;
  line-height: 1.15;
}
.hero-lead {
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
  color: rgba(245,242,235,.85);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}
.hero-trust span {
  font-size: 13px;
  color: rgba(245,242,235,.75);
  border: 1px solid rgba(245,242,235,.18);
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.04);
}
.hero-visual { position: relative; }
.hero-visual img {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: 0 24px 64px rgba(0,0,0,.4);
  border: 1px solid rgba(255,255,255,.1);
}
.hero-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--c-accent);
  color: var(--c-on-accent);
  font-size: 12px;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: 999px;
  box-shadow: var(--shadow-3);
  letter-spacing: .04em;
}
.hero-scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(245,242,235,.5);
  font-size: 1.4rem;
  animation: heroScroll 2s ease-in-out infinite;
}
@keyframes heroScroll {
  0%, 100% { transform: translate(-50%, 0); opacity: .5; }
  50% { transform: translate(-50%, 8px); opacity: .9; }
}

/* ========== 痛点引言 ========== */
.pain-point { background: var(--c-bg); }
.pain-inner { max-width: 760px; padding: clamp(48px, 7vw, 80px) 0; }
.pain-inner blockquote {
  font-size: clamp(1.4rem, 2.4vw, 1.75rem);
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-ink);
  margin: 0;
  text-align: left;
  letter-spacing: -.01em;
}

/* ========== 核心解决方案 ========== */
.solutions { background: var(--c-surface); border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); }
.solutions .sticky-head { position: sticky; top: calc(var(--header-h) + 40px); }
.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-auto-rows: minmax(170px, auto);
  gap: 24px;
}
.solution-card {
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.solution-card:hover {
  border-color: rgba(217,142,50,.4);
  box-shadow: var(--shadow-3);
  transform: translateY(-2px);
}
.solution-card-featured { grid-row: span 2; }
.solution-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(217,142,50,.12);
  border: 1px solid rgba(217,142,50,.2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--c-accent-strong);
  font-size: 1.3rem;
  margin-bottom: 16px;
}
.solution-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.solution-card p { font-size: .92rem; color: var(--c-muted); line-height: 1.65; margin-bottom: 0; }
.solution-card .solution-cover { margin: 18px -28px -28px; margin-top: auto; }
.solution-card .solution-cover img { width: 100%; height: 160px; object-fit: cover; border-radius: 0 0 var(--radius-card) var(--radius-card); }
.solution-card-featured .solution-cover img { height: 220px; }

/* ========== 数据区 ========== */
.stats { background: var(--c-bg); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--c-line); }
.stat-item { border-bottom: 1px solid var(--c-line); padding: 32px 16px 28px; }
.stat-item + .stat-item { border-left: 1px solid var(--c-line); }
.stat-num {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--c-ink);
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -.02em;
}
.stat-num::after { content: "+"; color: var(--c-accent); font-size: .6em; margin-left: 2px; }
.stat-label { font-size: .9rem; color: var(--c-muted); }

/* ========== 证言区 ========== */
.testimonials { background: var(--c-dark-block); color: var(--c-on-dark); position: relative; overflow: hidden; }
.testimonials::before {
  content: "";
  position: absolute;
  top: -60px;
  left: -60px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(217,142,50,.14) 0%, transparent 70%);
  pointer-events: none;
}
.testimonial-main { max-width: 720px; margin-bottom: 56px; }
.testimonial-main blockquote {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 600;
  line-height: 1.5;
  color: #fff;
  margin: 0 0 20px;
  letter-spacing: -.01em;
}
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(217,142,50,.2);
  border: 1px solid rgba(217,142,50,.35);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--c-accent);
  font-size: 1.1rem;
  font-weight: 700;
  flex-shrink: 0;
}
.testimonial-name { font-size: .95rem; font-weight: 600; color: var(--c-on-dark); }
.testimonial-role { font-size: .8rem; color: var(--c-on-dark-muted); }
.testimonial-sub { display: flex; flex-direction: column; gap: 16px; }
.testimonial-card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-card);
  padding: 24px;
}
.testimonial-card p {
  color: rgba(245,242,235,.75);
  font-size: .95rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

/* ========== 资讯区 ========== */
.news { background: var(--c-surface); }
.news-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 32px;
  margin-top: 40px;
}
.news-column { display: flex; flex-direction: column; gap: 16px; }
.news-featured {
  position: relative;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-card);
  padding: 36px;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
}
.news-featured::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--c-accent);
}
.news-featured:hover { box-shadow: var(--shadow-3); transform: translateY(-2px); border-color: rgba(217,142,50,.3); }
.news-featured .news-badge { position: absolute; top: 24px; left: 24px; }
.news-featured h3 { font-size: 1.4rem; font-weight: 700; margin: 0 0 10px; }
.news-featured p { color: var(--c-muted); font-size: .95rem; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-featured time { font-size: .82rem; color: var(--c-muted); }
.news-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: var(--c-accent-strong);
  background: rgba(217,142,50,.12);
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: .05em;
}
.news-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--c-line);
  transition: padding-left .25s ease, border-color .25s ease;
}
.news-item:last-child { border-bottom: none; }
.news-item:hover { padding-left: 8px; border-color: rgba(217,142,50,.35); }
.news-item .news-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.news-item time { font-size: .8rem; color: var(--c-muted); flex-shrink: 0; }
.news-item h3 { font-size: 1rem; font-weight: 600; margin: 0; line-height: 1.4; }
.news-item p {
  font-size: .88rem;
  color: var(--c-muted);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  grid-column: 1 / -1;
  padding: 60px 24px;
  text-align: center;
  color: var(--c-muted);
  border: 1px dashed var(--c-line);
  border-radius: var(--radius-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.news-empty i { font-size: 2.2rem; color: var(--c-accent); opacity: .5; }
.news-empty p { margin: 0; font-size: .95rem; }

/* ========== FAQ 支持区 ========== */
.support-faq { background: var(--c-bg); }
.support-faq .faq-wrap { max-width: 780px; margin-top: 8px; }

/* ========== 最终 CTA ========== */
.cta-final {
  background: var(--c-dark-block);
  color: var(--c-on-dark);
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: clamp(72px, 10vw, 120px) 0;
}
.cta-final::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -20px;
  transform: translateX(-50%);
  width: 160%;
  height: 320px;
  background: radial-gradient(ellipse at center, rgba(217,142,50,.12) 0%, transparent 65%);
  pointer-events: none;
}
.cta-final .container { position: relative; z-index: 2; }
.cta-final h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: #fff;
  margin-bottom: 16px;
}
.cta-final p {
  color: var(--c-on-dark-muted);
  max-width: 560px;
  margin: 0 auto 36px;
  font-size: 1.05rem;
}
.cta-btn-group { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; align-items: center; }
.cta-link {
  color: var(--c-on-dark-muted);
  font-size: .95rem;
  border-bottom: 1px solid var(--c-on-dark-muted);
  padding-bottom: 2px;
}
.cta-link:hover { color: var(--c-accent); border-color: var(--c-accent); }

/* ========== Footer ========== */
.site-footer { background: var(--c-dark-block); color: var(--c-on-dark); border-top: 1px solid var(--c-accent); }
.footer-top {
  padding: clamp(48px, 6vw, 72px) 0 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .brand { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.footer-brand .brand-mark { color: var(--c-accent); }
.footer-brand .brand-text { font-size: 1.2rem; font-weight: 800; color: var(--c-on-dark); }
.footer-brand .brand-tag {
  font-size: 10px;
  font-weight: 700;
  background: rgba(217,142,50,.18);
  color: var(--c-accent);
  border: 1px solid rgba(217,142,50,.3);
  padding: 2px 8px;
  border-radius: 999px;
}
.footer-brand p { color: var(--c-on-dark-muted); font-size: .9rem; line-height: 1.7; max-width: 260px; }
.footer-col h4 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--c-on-dark);
  margin-bottom: 18px;
  letter-spacing: .04em;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--c-on-dark-muted); font-size: .9rem; transition: color .2s ease; }
.footer-col a:hover { color: var(--c-accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { margin: 0; font-size: .85rem; color: var(--c-on-dark-muted); }
.footer-bottom .footer-legal a { color: var(--c-on-dark-muted); font-size: .85rem; margin-left: 20px; }
.footer-bottom .footer-legal a:hover { color: var(--c-accent); }

/* ========== 滚动显现 ========== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ========== 响应式 ========== */
@media (max-width: 1199.98px) {
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .stat-item:nth-child(4) { display: none; }
}
@media (max-width: 991.98px) {
  .site-header { height: 56px; }
  .site-header.scrolled { height: 56px; }
  .navbar-collapse {
    background: var(--c-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-3);
    margin-top: 10px;
    border: 1px solid var(--c-line);
  }
  .navbar-nav { gap: 0; text-align: left; }
  .navbar-nav .nav-link { padding: 12px 8px !important; border-radius: 6px; }
  .navbar-nav .nav-link.active::after { bottom: 4px; }
  .nav-actions { margin-top: 12px; justify-content: flex-start; flex-wrap: wrap; }
  .header-search { display: flex; }
  .search-form { position: static; transform: none; width: 0; }
  .search-form.open { width: 180px; }
  .solution-grid { grid-template-columns: 1fr; grid-auto-rows: auto; }
  .solution-card-featured { grid-row: auto; }
  .news-grid { grid-template-columns: 1fr; }
  .testimonial-sub { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .hero-visual { margin-top: 40px; }
  .hero-waves { opacity: .18; }
}
@media (max-width: 767.98px) {
  .hero { padding-top: calc(var(--header-h) + 48px); }
  .hero h1 { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-trust span { font-size: 12px; padding: 5px 10px; }
  .testimonial-sub { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item:nth-child(4) { display: block; }
  .stat-item:nth-child(even) { border-left: none; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-bottom .footer-legal { display: flex; gap: 16px; }
  .footer-bottom .footer-legal a { margin-left: 0; }
  .news-featured { padding: 28px 20px; }
  .news-featured h3 { font-size: 1.2rem; }
  .solution-card { padding: 22px; }
  .section-head-line { margin-top: 16px; }
}
@media (max-width: 575.98px) {
  .btn { height: 40px; padding: 0 20px; }
  .btn-lg { height: 48px; }
  .hero-actions .btn { width: 100%; }
  .hero-actions .btn-ghost { width: 100%; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item { border-left: none !important; }
  .stat-item:nth-child(even) { border-left: none; }
  .news-grid { gap: 20px; }
  .pain-inner blockquote { font-size: 1.25rem; }
}

/* ========== 动效降级 ========== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* roulang page: article */
:root {
    --c-bg: #F5F2EB;
    --c-surface: #FFFFFF;
    --c-ink: #1A1816;
    --c-muted: #6F6A5E;
    --c-line: rgba(26, 24, 22, .12);
    --c-accent: #D98E32;
    --c-accent-strong: #BF6F1C;
    --c-on-accent: #1A1816;
    --c-dark-block: #121110;
    --c-on-dark: #F5F2EB;
    --c-on-dark-muted: #A9A193;
    --shadow-1: 0 1px 2px rgba(18,17,16,.05);
    --shadow-2: 0 8px 24px rgba(18,17,16,.08);
    --shadow-3: 0 16px 40px rgba(18,17,16,.12);
    --radius-btn: 6px;
    --radius-card: 12px;
    --radius-img: 8px;
    --container-w: 1200px;
    --header-h: 72px;
    --header-h-scroll: 56px;
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
  }

  body {
    font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--c-bg);
    color: var(--c-ink);
    font-size: 1rem;
    line-height: 1.7;
    font-variant-numeric: tabular-nums;
    overflow-x: hidden;
  }

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

  a {
    color: inherit;
    text-decoration: none;
    transition: color .25s ease, background-color .25s ease, border-color .25s ease, box-shadow .25s ease;
  }

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

  button,
  input,
  select {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
  }

  button:focus-visible,
  a:focus-visible,
  input:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
  }

  .container {
    max-width: var(--container-w);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }

  /* ============ Header / Nav ============ */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-h);
    background: rgba(245, 242, 235, .92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--c-line);
    transition: height .3s ease, background .3s ease, box-shadow .3s ease;
  }

  .site-header.scrolled {
    height: var(--header-h-scroll);
    box-shadow: var(--shadow-1);
    background: rgba(245, 242, 235, .97);
  }

  .site-header .container {
    height: 100%;
    display: flex;
    align-items: center;
  }

  .site-header .navbar {
    width: 100%;
    height: 100%;
    padding: 0;
    flex-wrap: nowrap;
  }

  .navbar-brand {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0;
    margin: 0;
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--c-ink);
    letter-spacing: .01em;
    white-space: nowrap;
  }

  .navbar-brand:hover {
    color: var(--c-ink);
  }

  .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
  }

  .brand-text {
    font-size: 1.25rem;
    font-weight: 800;
  }

  .brand-tag {
    display: inline-block;
    background: rgba(217, 142, 50, .15);
    color: var(--c-accent-strong);
    font-size: .6875rem;
    font-weight: 700;
    line-height: 1;
    padding: 4px 7px;
    border-radius: 999px;
    margin-left: 4px;
    letter-spacing: .04em;
  }

  .navbar-nav {
    gap: 4px;
    align-items: center;
  }

  .navbar-nav .nav-item {
    list-style: none;
  }

  .navbar-nav .nav-link {
    display: inline-block;
    padding: 10px 16px;
    color: var(--c-ink);
    font-size: .9375rem;
    font-weight: 500;
    border-radius: var(--radius-btn);
    position: relative;
    transition: color .25s ease, background .25s ease;
  }

  .navbar-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 4px;
    height: 2px;
    background: var(--c-accent);
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform .3s ease;
  }

  .navbar-nav .nav-link:hover,
  .navbar-nav .nav-link.active {
    color: var(--c-ink);
    font-weight: 700;
  }

  .navbar-nav .nav-link:hover::after,
  .navbar-nav .nav-link.active::after {
    transform: scaleX(1);
  }

  .nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-left: 16px;
  }

  .header-search {
    display: flex;
    align-items: center;
    position: relative;
  }

  .search-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 44px;
    border: none;
    background: transparent;
    color: var(--c-ink);
    font-size: 1.125rem;
    cursor: pointer;
    border-radius: var(--radius-btn);
    transition: color .25s, background .25s;
  }

  .search-toggle:hover {
    background: rgba(26, 24, 22, .06);
    color: var(--c-accent-strong);
  }

  .search-form {
    position: absolute;
    right: 40px;
    top: 50%;
    transform: translateY(-50%) scaleX(.92);
    opacity: 0;
    pointer-events: none;
    transform-origin: right center;
    transition: opacity .25s ease, transform .25s ease;
  }

  .search-form.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-50%) scaleX(1);
  }

  .search-form input {
    width: 220px;
    height: 44px;
    border: 1px solid var(--c-line);
    border-radius: var(--radius-btn);
    background: var(--c-surface);
    padding: 0 42px 0 16px;
    font-size: .875rem;
    box-shadow: var(--shadow-1);
  }

  .search-form input:focus {
    border-color: var(--c-accent);
    box-shadow: 0 0 0 3px rgba(217, 142, 50, .15);
    outline: none;
  }

  .nav-login {
    font-size: .9375rem;
    font-weight: 500;
    color: var(--c-ink);
    white-space: nowrap;
    padding: 0 4px;
  }

  .nav-login:hover {
    color: var(--c-accent-strong);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 24px;
    border-radius: var(--radius-btn);
    font-size: .9375rem;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all .25s ease;
  }

  .btn-accent {
    background: var(--c-accent);
    color: var(--c-on-accent);
    border-color: var(--c-accent);
    white-space: nowrap;
  }

  .btn-accent:hover {
    background: var(--c-accent-strong);
    border-color: var(--c-accent-strong);
    color: var(--c-on-accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow-2);
  }

  .btn-accent:active {
    transform: translateY(1px);
    box-shadow: none;
  }

  .btn-outline {
    background: transparent;
    border-color: var(--c-line);
    color: var(--c-ink);
  }

  .btn-outline:hover {
    border-color: var(--c-accent);
    color: var(--c-accent-strong);
    background: rgba(217, 142, 50, .05);
  }

  .navbar-toggler {
    border: none;
    background: transparent;
    color: var(--c-ink);
    font-size: 1.5rem;
    padding: 4px 8px;
    border-radius: var(--radius-btn);
    box-shadow: none !important;
  }

  .navbar-toggler:hover {
    background: rgba(26, 24, 22, .05);
  }

  .mobile-search form {
    display: flex;
  }

  .mobile-search input {
    flex: 1;
    height: 44px;
    border: 1px solid var(--c-line);
    border-radius: var(--radius-btn);
    background: var(--c-surface);
    padding: 0 16px;
    font-size: .875rem;
  }

  .mobile-search input:focus {
    border-color: var(--c-accent);
    box-shadow: 0 0 0 3px rgba(217, 142, 50, .15);
    outline: none;
  }

  /* ============ Page Banner ============ */
  .page-banner {
    position: relative;
    min-height: 220px;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    overflow: hidden;
  }

  .banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(18, 17, 16, .88) 0%, rgba(18, 17, 16, .72) 55%, rgba(18, 17, 16, .55) 100%);
  }

  .page-banner .container {
    position: relative;
    z-index: 2;
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .breadcrumb-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: .8125rem;
    color: var(--c-on-dark-muted);
    margin-bottom: 16px;
  }

  .breadcrumb-nav a {
    color: rgba(245, 242, 235, .75);
    transition: color .25s;
  }

  .breadcrumb-nav a:hover {
    color: var(--c-accent);
  }

  .breadcrumb-nav .sep {
    color: rgba(245, 242, 235, .4);
  }

  .breadcrumb-nav .current {
    color: var(--c-on-dark);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 460px;
  }

  .banner-title {
    font-size: clamp(1.6rem, 3.2vw, 2.6rem);
    font-weight: 800;
    color: var(--c-on-dark);
    line-height: 1.35;
    letter-spacing: -.01em;
    margin-bottom: 18px;
    max-width: 760px;
    overflow-wrap: break-word;
  }

  .article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
    font-size: .875rem;
    color: var(--c-on-dark-muted);
  }

  .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .meta-item i {
    color: var(--c-accent);
    font-size: .9375rem;
  }

  /* ============ Article Body ============ */
  .article-wrap {
    padding: 64px 0 40px;
  }

  .article-body {
    max-width: 720px;
    margin: 0 auto;
  }

  .cms-content {
    font-size: 1.0625rem;
    line-height: 1.9;
    color: var(--c-ink);
  }

  .cms-content p {
    margin-bottom: 24px;
    font-size: 1.0625rem;
    line-height: 1.9;
    text-align: left;
  }

  .cms-content h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 40px 0 18px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--c-line);
    line-height: 1.4;
  }

  .cms-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 32px 0 14px;
    line-height: 1.5;
  }

  .cms-content h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin: 24px 0 10px;
  }

  .cms-content ul,
  .cms-content ol {
    margin: 0 0 24px 0;
    padding-left: 24px;
  }

  .cms-content li {
    margin-bottom: 8px;
    line-height: 1.8;
  }

  .cms-content blockquote {
    margin: 28px 0;
    padding: 20px 24px;
    border-left: 3px solid var(--c-accent);
    background: rgba(217, 142, 50, .06);
    border-radius: 0 var(--radius-card) var(--radius-card) 0;
    font-size: 1rem;
    color: var(--c-muted);
    line-height: 1.8;
  }

  .cms-content blockquote p:last-child {
    margin-bottom: 0;
  }

  .cms-content img {
    border-radius: var(--radius-img);
    margin: 24px 0 8px;
    width: 100%;
    height: auto;
    object-fit: cover;
  }

  .cms-content figure {
    margin: 24px 0;
    text-align: center;
  }

  .cms-content figure img {
    margin: 0 auto;
  }

  .cms-content figcaption {
    font-size: .8125rem;
    color: var(--c-muted);
    margin-top: 10px;
    text-align: center;
  }

  .cms-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: .9375rem;
  }

  .cms-content th,
  .cms-content td {
    border: 1px solid var(--c-line);
    padding: 10px 14px;
    text-align: left;
  }

  .cms-content th {
    background: rgba(26, 24, 22, .04);
    font-weight: 600;
  }

  .cms-content pre {
    background: #1E1D1B;
    color: #F5F2EB;
    padding: 20px;
    border-radius: var(--radius-card);
    overflow-x: auto;
    font-size: .875rem;
    line-height: 1.7;
    margin: 24px 0;
  }

  .cms-content code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    background: rgba(26, 24, 22, .06);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: .875rem;
  }

  .cms-content pre code {
    background: transparent;
    padding: 0;
  }

  .cms-content a {
    color: var(--c-accent-strong);
    text-decoration: underline;
    text-underline-offset: 3px;
  }

  .cms-content a:hover {
    color: var(--c-ink);
  }

  .cms-content hr {
    border: none;
    border-top: 1px solid var(--c-line);
    margin: 40px 0;
  }

  /* ============ Article Empty ============ */
  .article-empty {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
    padding: 56px 24px;
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--radius-card);
  }

  .article-empty .empty-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(217, 142, 50, .1);
    color: var(--c-accent);
    font-size: 1.75rem;
    margin-bottom: 16px;
  }

  .article-empty h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .article-empty p {
    color: var(--c-muted);
    margin-bottom: 24px;
  }

  /* ============ Tags & Back ============ */
  .article-footer {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 0 0;
  }

  .article-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 24px 0;
    border-top: 1px solid var(--c-line);
    border-bottom: 1px solid var(--c-line);
    margin-bottom: 24px;
  }

  .tag-label {
    font-size: .875rem;
    color: var(--c-muted);
    font-weight: 600;
    margin-right: 4px;
  }

  .tag-item {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(217, 142, 50, .1);
    color: var(--c-accent-strong);
    font-size: .8125rem;
    font-weight: 600;
    border-radius: 999px;
    transition: background .25s ease, color .25s ease;
  }

  .tag-item:hover {
    background: var(--c-accent);
    color: var(--c-on-accent);
  }

  .article-back {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding: 8px 0 16px;
  }

  .back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: .9375rem;
    font-weight: 500;
    color: var(--c-muted);
    transition: color .25s, gap .25s;
  }

  .back-link:hover {
    color: var(--c-accent-strong);
    gap: 10px;
  }

  /* ============ Related Posts ============ */
  .related-section {
    padding: 64px 0 80px;
  }

  .section-heading {
    max-width: 720px;
    margin: 0 auto 40px;
    text-align: center;
  }

  .eye-brow {
    display: inline-block;
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--c-accent-strong);
    margin-bottom: 8px;
  }

  .section-heading h2 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -.01em;
  }

  .section-heading p {
    color: var(--c-muted);
    font-size: .9375rem;
  }

  .related-list {
    max-width: 960px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid var(--c-line);
  }

  .related-item {
    display: block;
    padding: 28px 24px;
    border-bottom: 1px solid var(--c-line);
    border-right: 1px solid var(--c-line);
    transition: background .3s ease, box-shadow .3s ease;
  }

  .related-item:first-child {
    border-left: 1px solid var(--c-line);
  }

  .related-item:hover {
    background: var(--c-surface);
    box-shadow: var(--shadow-2);
    transform: translateY(-2px);
  }

  .related-index {
    font-size: .75rem;
    font-weight: 800;
    color: var(--c-accent);
    letter-spacing: .08em;
    margin-bottom: 12px;
    display: block;
  }

  .related-cat {
    display: inline-block;
    font-size: .75rem;
    font-weight: 600;
    color: var(--c-accent-strong);
    background: rgba(217, 142, 50, .1);
    padding: 4px 10px;
    border-radius: 999px;
    margin-bottom: 12px;
  }

  .related-item h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 8px;
    color: var(--c-ink);
    transition: color .25s;
  }

  .related-item:hover h3 {
    color: var(--c-accent-strong);
  }

  .related-item p {
    font-size: .875rem;
    color: var(--c-muted);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 14px;
  }

  .related-date {
    font-size: .8125rem;
    color: var(--c-muted);
    display: block;
  }

  /* ============ Footer ============ */
  .site-footer {
    background: var(--c-dark-block);
    color: var(--c-on-dark);
    border-top: 1px solid var(--c-accent);
    padding: 64px 0 0;
  }

  .footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 48px;
  }

  .footer-brand .brand {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 16px;
  }

  .footer-brand .brand-text {
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--c-on-dark);
  }

  .footer-brand p {
    font-size: .875rem;
    color: var(--c-on-dark-muted);
    line-height: 1.8;
    max-width: 300px;
    margin-bottom: 0;
  }

  .footer-col h4 {
    font-size: .9375rem;
    font-weight: 700;
    color: var(--c-on-dark);
    margin-bottom: 18px;
  }

  .footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .footer-col li {
    margin-bottom: 10px;
  }

  .footer-col a {
    font-size: .875rem;
    color: var(--c-on-dark-muted);
    transition: color .25s;
  }

  .footer-col a:hover {
    color: var(--c-accent);
  }

  .footer-bottom {
    border-top: 1px solid rgba(245, 242, 235, .08);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
  }

  .footer-bottom p {
    font-size: .8125rem;
    color: var(--c-on-dark-muted);
    margin: 0;
  }

  .footer-legal {
    display: flex;
    gap: 20px;
  }

  .footer-legal a {
    font-size: .8125rem;
    color: var(--c-on-dark-muted);
  }

  .footer-legal a:hover {
    color: var(--c-accent);
  }

  /* ============ Reveal Animation ============ */
  .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity .6s ease, transform .6s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* ============ Responsive ============ */
  @media (max-width: 991.98px) {
    .navbar-collapse {
      background: var(--c-bg);
      border: 1px solid var(--c-line);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-2);
      padding: 20px;
      margin-top: 12px;
    }

    .navbar-nav {
      gap: 0;
      margin-bottom: 16px;
    }

    .navbar-nav .nav-link {
      display: block;
      padding: 12px 8px;
      border-radius: var(--radius-btn);
    }

    .navbar-nav .nav-link::after {
      display: none;
    }

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      background: rgba(217, 142, 50, .1);
    }

    .nav-actions {
      display: flex;
      gap: 12px;
      margin-left: 0;
      flex-wrap: wrap;
    }

    .header-search {
      display: none;
    }

    .mobile-search {
      display: block;
    }

    .footer-top {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
  }

  @media (max-width: 767.98px) {
    .related-list {
      grid-template-columns: 1fr;
    }

    .related-item {
      border-right: none;
      border-left: 1px solid var(--c-line);
    }

    .section-heading {
      text-align: left;
    }
  }

  @media (max-width: 575.98px) {
    .container {
      padding-left: 16px;
      padding-right: 16px;
    }

    .banner-title {
      font-size: 1.4rem;
    }

    .article-meta {
      gap: 12px;
    }

    .footer-top {
      grid-template-columns: 1fr;
      gap: 28px;
    }

    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }

    .btn {
      height: 40px;
      padding: 0 18px;
      font-size: .875rem;
    }
  }

  /* ============ Reduced Motion ============ */
  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation-duration: .01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: .01ms !important;
      scroll-behavior: auto !important;
    }
  }

/* roulang page: category1 */
:root {
  --c-bg: #F5F2EB;
  --c-surface: #FFFFFF;
  --c-ink: #1A1816;
  --c-muted: #6F6A5E;
  --c-line: rgba(26, 24, 22, .12);
  --c-accent: #D98E32;
  --c-accent-strong: #BF6F1C;
  --c-on-accent: #1A1816;
  --c-dark-block: #121110;
  --c-on-dark: #F5F2EB;
  --c-on-dark-muted: #A9A193;
  --font-sans: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --shadow-1: 0 1px 2px rgba(18,17,16,.05);
  --shadow-2: 0 8px 24px rgba(18,17,16,.08);
  --shadow-3: 0 16px 40px rgba(18,17,16,.12);
  --radius-btn: 6px;
  --radius-card: 12px;
  --radius-img: 8px;
  --radius-input: 6px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: inherit; }
button { font-family: inherit; }
input { font-family: inherit; }
:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; border-radius: 2px; }
.container { max-width: 1200px; }
section[id] { scroll-margin-top: 84px; }
h1, h2, h3, h4 { margin-top: 0; font-weight: 700; line-height: 1.25; }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 800; }
h3 { font-size: 1.25rem; }
.eyebrow { display: inline-block; font-size: .75rem; letter-spacing: .12em; color: var(--c-accent-strong); font-weight: 700; text-transform: uppercase; margin-bottom: 10px; }
.lead { font-size: 1.05rem; line-height: 1.8; }
.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head p { color: var(--c-muted); margin-bottom: 0; }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.revealed { opacity: 1; transform: none; }

.btn { border-radius: var(--radius-btn); }
.btn-accent {
  background: var(--c-accent);
  color: var(--c-on-accent);
  border: 1px solid transparent;
  font-weight: 600;
  height: 44px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-btn);
  transition: background .2s ease, color .2s ease, transform .12s ease, box-shadow .2s ease;
}
.btn-accent:hover { background: var(--c-accent-strong); color: var(--c-on-accent); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(191,111,28,.22); }
.btn-accent:active { transform: translateY(0) scale(.99); }
.btn-accent.btn-lg { height: 48px; padding: 0 30px; font-size: 1.05rem; }
.btn-outline-dark {
  background: transparent;
  color: var(--c-ink);
  border: 1px solid rgba(26,24,22,.2);
  font-weight: 600;
  height: 44px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-btn);
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .12s ease;
}
.btn-outline-dark:hover { border-color: var(--c-accent); color: var(--c-accent-strong); background: rgba(217,142,50,.08); }
.btn-outline-dark:active { transform: translateY(0) scale(.99); }
.btn-outline-dark.btn-sm { height: 38px; padding: 0 16px; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1030;
  height: 72px;
  background: rgba(245,242,235,.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(26,24,22,.08);
  transition: height .3s ease, background .3s ease, box-shadow .3s ease;
}
.site-header.scrolled { height: 56px; background: rgba(245,242,235,.96); box-shadow: var(--shadow-1); }
.site-header .container,
.site-header .navbar { height: 100%; }
.site-header .navbar { padding: 0; }
.navbar-brand { display: inline-flex; align-items: center; gap: 8px; padding: 0; margin: 0; }
.brand-mark { display: inline-flex; }
.brand-text { font-size: 1.35rem; font-weight: 800; color: var(--c-ink); letter-spacing: -.02em; }
.brand-tag { font-size: .7rem; font-weight: 600; color: var(--c-accent-strong); background: rgba(217,142,50,.12); border: 1px solid rgba(217,142,50,.24); padding: 2px 8px; border-radius: 999px; }
.navbar-toggler { border: none; color: var(--c-ink); font-size: 1.5rem; padding: 4px 8px; background: transparent; }
.navbar-toggler:focus { box-shadow: none; outline: 2px solid var(--c-accent); }
.site-header .navbar-nav { gap: 8px; }
.site-header .nav-link {
  position: relative;
  font-size: .95rem;
  font-weight: 500;
  color: var(--c-ink);
  padding: 8px 14px !important;
  transition: color .2s ease;
}
.site-header .nav-link:hover { color: var(--c-accent-strong); }
.site-header .nav-link.active { font-weight: 700; }
.site-header .nav-link.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--c-accent);
  border-radius: 2px;
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.header-search { position: relative; }
.search-toggle {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: var(--radius-btn);
  font-size: 1rem;
  color: var(--c-ink);
  transition: background .2s ease;
}
.search-toggle:hover { background: rgba(26,24,22,.06); }
.search-form {
  position: absolute;
  right: 42px;
  top: 50%;
  transform: translateY(-50%) scale(.95);
  transform-origin: right center;
  width: 220px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
.search-form.open { opacity: 1; pointer-events: auto; transform: translateY(-50%) scale(1); }
.search-form input {
  width: 100%;
  height: 40px;
  border: 1px solid var(--c-line);
  background: var(--c-surface);
  border-radius: var(--radius-input);
  padding: 0 14px;
  font-size: .875rem;
  color: var(--c-ink);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.search-form input:focus { outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(217,142,50,.15); }
.nav-login { color: var(--c-ink); text-decoration: none; font-weight: 500; font-size: .9rem; padding: 6px 10px; transition: color .2s ease; }
.nav-login:hover { color: var(--c-accent-strong); }
.mobile-search { display: none; }

.page-hero {
  position: relative;
  padding: 180px 0 84px;
  background: var(--c-dark-block) url('/assets/images/backpic/back-1.png') center 30% / cover no-repeat;
  color: var(--c-on-dark);
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(18,17,16,.95) 0%, rgba(18,17,16,.82) 52%, rgba(18,17,16,.45) 100%);
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb-nav { font-size: .875rem; color: var(--c-on-dark-muted); margin-bottom: 24px; display: flex; align-items: center; gap: 6px; }
.breadcrumb-nav a { color: rgba(245,242,235,.72); text-decoration: none; transition: color .2s; }
.breadcrumb-nav a:hover { color: var(--c-accent); }
.breadcrumb-nav .sep { opacity: .5; }
.page-hero h1 { font-size: clamp(2.2rem, 4.5vw, 3.4rem); font-weight: 800; color: var(--c-on-dark); margin-bottom: 18px; max-width: 640px; }
.page-hero .lead { color: rgba(245,242,235,.85); font-size: 1.05rem; line-height: 1.8; max-width: 560px; }
.beat-lines { display: flex; align-items: center; gap: 5px; height: 46px; margin-top: 28px; }
.beat-lines span {
  display: block;
  width: 2px;
  background: var(--c-accent);
  border-radius: 2px;
  transform-origin: bottom;
  animation: beatPulse .8s ease-in-out infinite alternate;
}
.beat-lines span:nth-child(1) { height: 14px; animation-delay: 0s; }
.beat-lines span:nth-child(2) { height: 28px; animation-delay: .1s; }
.beat-lines span:nth-child(3) { height: 40px; animation-delay: .2s; }
.beat-lines span:nth-child(4) { height: 24px; animation-delay: .3s; }
.beat-lines span:nth-child(5) { height: 34px; animation-delay: .15s; }
.beat-lines span:nth-child(6) { height: 20px; animation-delay: .25s; }
.beat-lines span:nth-child(7) { height: 34px; animation-delay: .05s; }
@keyframes beatPulse { from { transform: scaleY(.65); } to { transform: scaleY(1); } }

.product-story { padding: clamp(64px, 9vw, 112px) 0; }
.feature-row { margin-bottom: 88px; }
.feature-row:last-child { margin-bottom: 0; }
.feature-media { position: relative; }
.feature-media img {
  width: 100%;
  border-radius: var(--radius-img);
  box-shadow: var(--shadow-2);
  transition: transform .45s ease;
}
.feature-media:hover img { transform: scale(1.02); }
.feature-content .eyebrow { margin-bottom: 12px; }
.feature-content h2 { margin-bottom: 16px; }
.feature-content p { color: var(--c-muted); font-size: 1rem; line-height: 1.8; margin-bottom: 24px; }
.feature-tick-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.feature-tick-list li { display: flex; align-items: center; gap: 10px; font-size: .95rem; font-weight: 500; }
.feature-tick-list i { color: var(--c-accent-strong); font-size: 1.1rem; }

.proof-strip {
  padding: clamp(48px, 7vw, 80px) 0;
  background: var(--c-surface);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.proof-item { display: flex; flex-direction: column; gap: 8px; border-bottom: 1px solid var(--c-line); padding-bottom: 20px; }
.proof-num { font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 800; line-height: 1.1; font-variant-numeric: tabular-nums; }
.proof-label { font-size: .875rem; color: var(--c-muted); }

.compare-section { padding: clamp(64px, 9vw, 112px) 0; }
.compare-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: stretch; }
.compare-card {
  position: relative;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-card);
  padding: 36px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-1);
  transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
}
.compare-card:hover { box-shadow: var(--shadow-3); transform: translateY(-4px); border-color: rgba(217,142,50,.35); }
.compare-card.featured { border-color: rgba(217,142,50,.55); box-shadow: var(--shadow-2); }
.compare-card.featured:hover { box-shadow: var(--shadow-3); }
.corner-label {
  position: absolute;
  top: 16px;
  right: 16px;
  display: inline-block;
  background: var(--c-accent);
  color: var(--c-on-accent);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 4px 10px;
  border-radius: 999px;
}
.compare-title { margin-bottom: 20px; }
.compare-title .version-icon {
  display: inline-flex;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: rgba(217,142,50,.12);
  color: var(--c-accent-strong);
  border-radius: 6px;
  font-weight: 800;
  margin-bottom: 12px;
}
.compare-title h3 { font-size: 1.3rem; font-weight: 800; margin: 0 0 4px; }
.compare-title p { color: var(--c-muted); font-size: .875rem; margin: 0; }
.spec-list { list-style: none; padding: 0; margin: 0 0 28px; }
.spec-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .95rem;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-line);
}
.spec-list li:last-child { border-bottom: 0; }
.spec-list i { font-size: 1.05rem; }
.spec-list .has i { color: var(--c-accent-strong); }
.spec-list .not i { color: #C4BDB3; }
.compare-card .btn { margin-top: auto; align-self: flex-start; }

.mini-cta {
  position: relative;
  padding: clamp(64px, 9vw, 96px) 0;
  background: var(--c-dark-block);
  color: var(--c-on-dark);
  overflow: hidden;
}
.mini-cta::after {
  content: '';
  position: absolute;
  right: -80px;
  bottom: -100px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217,142,50,.18) 0%, transparent 70%);
}
.mini-cta .container { position: relative; z-index: 1; text-align: center; }
.mini-cta .beat-lines { justify-content: center; margin-top: 0; margin-bottom: 24px; }
.mini-cta h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800; margin-bottom: 16px; color: var(--c-on-dark); }
.mini-cta p { color: var(--c-on-dark-muted); max-width: 560px; margin: 0 auto 28px; }
.cta-group { display: flex; justify-content: center; align-items: center; gap: 20px; flex-wrap: wrap; }
.link-ghost { color: var(--c-on-dark-muted); text-decoration: none; font-weight: 500; font-size: .95rem; padding: 8px 12px; transition: color .2s ease; }
.link-ghost:hover { color: var(--c-accent); }

.site-footer {
  background: var(--c-dark-block);
  color: var(--c-on-dark-muted);
  padding: 64px 0 32px;
  border-top: 2px solid var(--c-accent);
}
.footer-top { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 44px; }
.footer-brand .brand { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.footer-brand p { font-size: .875rem; line-height: 1.8; color: var(--c-on-dark-muted); max-width: 300px; margin: 0; }
.footer-col h4 { color: var(--c-on-dark); font-size: .95rem; font-weight: 700; margin-bottom: 14px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { line-height: 2.2; }
.footer-col a { color: var(--c-on-dark-muted); text-decoration: none; font-size: .875rem; transition: color .2s ease; }
.footer-col a:hover { color: var(--c-accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(245,242,235,.12); padding-top: 24px; font-size: .8125rem; color: rgba(169,161,147,.75); }
.footer-bottom a { color: rgba(169,161,147,.75); text-decoration: none; margin-left: 24px; transition: color .2s ease; }
.footer-bottom a:hover { color: var(--c-accent); }

@media (max-width: 991.98px) {
  .site-header .navbar-collapse {
    background: var(--c-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-2);
    padding: 20px;
    margin-top: 12px;
    border: 1px solid var(--c-line);
  }
  .site-header .navbar-nav { align-items: flex-start; }
  .site-header .nav-link.active::after { left: 0; right: auto; width: 18px; }
  .site-header .nav-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--c-line);
    width: 100%;
  }
  .site-header .header-search { display: none; }
  .mobile-search { display: block; margin-top: 12px; width: 100%; }
  .mobile-search form { display: flex; }
  .mobile-search input {
    flex: 1;
    width: 100%;
    height: 44px;
    border: 1px solid var(--c-line);
    background: var(--c-surface);
    border-radius: var(--radius-input);
    padding: 0 14px;
    font-size: .9rem;
  }
  .mobile-search input:focus { outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(217,142,50,.15); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767.98px) {
  .page-hero { padding: 136px 0 56px; }
  .page-hero h1 { font-size: clamp(1.8rem, 5vw, 2.2rem); }
  .page-hero .lead { font-size: .95rem; }
  .product-story { padding: 56px 0; }
  .feature-row { margin-bottom: 56px; }
  .proof-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .compare-wrap { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .site-header .navbar-collapse { max-height: calc(100vh - 80px); overflow-y: auto; }
}

@media (max-width: 575.98px) {
  .brand-text { font-size: 1.15rem; }
  .brand-tag { font-size: .65rem; padding: 1px 6px; }
  .site-header { height: 60px; }
  .page-hero { padding: 116px 0 44px; }
  .section-head { margin-bottom: 32px; }
  .compare-card { padding: 26px 22px; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
  .footer-bottom a { margin: 0 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* roulang page: category2 */
:root {
  --c-bg: #F5F2EB;
  --c-surface: #FFFFFF;
  --c-ink: #1A1816;
  --c-muted: #6F6A5E;
  --c-line: rgba(26, 24, 22, .12);
  --c-accent: #D98E32;
  --c-accent-strong: #BF6F1C;
  --c-on-accent: #1A1816;
  --c-dark-block: #121110;
  --c-on-dark: #F5F2EB;
  --c-on-dark-muted: #A9A193;
  --shadow-1: 0 1px 2px rgba(18,17,16,.05);
  --shadow-2: 0 8px 24px rgba(18,17,16,.08);
  --shadow-3: 0 16px 40px rgba(18,17,16,.12);
  --radius-btn: 6px;
  --radius-card: 12px;
  --radius-img: 8px;
  --radius-input: 6px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--c-bg);
  color: var(--c-ink);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--c-accent-strong); }
button { font-family: inherit; }
h1, h2, h3, h4, h5 { font-weight: 700; color: var(--c-ink); line-height: 1.25; margin: 0 0 .5em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.container { max-width: 1200px; }
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: left; }
.section-head .eyebrow, .eyebrow {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--c-accent-strong);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); margin-bottom: 12px; }
.section-head p { color: var(--c-muted); font-size: 1rem; margin: 0; }
.section-head::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--c-accent);
  margin-top: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 24px;
  border-radius: 6px;
  font-size: .9375rem;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease, transform .15s ease;
}
.btn:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }
.btn-accent { background-color: var(--c-accent); color: var(--c-on-accent); border-color: transparent; }
.btn-accent:hover { background-color: var(--c-accent-strong); color: var(--c-on-accent); transform: translateY(-1px); box-shadow: var(--shadow-2); }
.btn-accent:active { transform: translateY(0); box-shadow: var(--shadow-1); }
.btn-ghost { background-color: transparent; border-color: var(--c-line); color: var(--c-ink); }
.btn-ghost:hover { border-color: var(--c-accent); color: var(--c-accent-strong); transform: translateY(-1px); box-shadow: var(--shadow-1); }
.btn-ghost-light { background-color: transparent; border-color: rgba(245,242,235,.35); color: var(--c-on-dark); }
.btn-ghost-light:hover { border-color: var(--c-accent); color: var(--c-accent); box-shadow: var(--shadow-1); }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1040;
  height: 72px;
  background: rgba(245,242,235,.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-line);
  transition: height .3s ease, background .3s ease, box-shadow .3s ease;
}
.site-header.scrolled { height: 56px; background: rgba(245,242,235,.96); box-shadow: var(--shadow-1); }
.site-header .navbar { min-height: 72px; padding: 10px 0; transition: min-height .3s ease, padding .3s ease; }
.site-header.scrolled .navbar { min-height: 56px; padding: 5px 0; }
.site-header .navbar-brand { display: inline-flex; align-items: center; gap: 8px; padding: 0; margin: 0; font-size: 0; }
.site-header .brand-mark { display: inline-flex; flex-shrink: 0; }
.site-header .brand-text { font-size: 1.35rem; font-weight: 800; color: var(--c-ink); letter-spacing: -.01em; }
.site-header .brand-tag {
  font-size: .6875rem;
  font-weight: 700;
  color: var(--c-accent-strong);
  background: rgba(217,142,50,.12);
  border: 1px solid rgba(217,142,50,.28);
  border-radius: 4px;
  padding: 2px 7px;
  line-height: 1.2;
  letter-spacing: .02em;
  white-space: nowrap;
}
.site-header .navbar-nav { align-items: center; }
.site-header .navbar-nav .nav-link {
  font-size: .9375rem;
  font-weight: 500;
  color: var(--c-muted);
  padding: 8px 18px;
  margin: 0 2px;
  position: relative;
  white-space: nowrap;
  transition: color .2s ease;
}
.site-header .navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--c-accent);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width .25s ease;
}
.site-header .navbar-nav .nav-link:hover { color: var(--c-ink); }
.site-header .navbar-nav .nav-link.active { color: var(--c-ink); font-weight: 700; }
.site-header .navbar-nav .nav-link.active::after { width: 18px; }
.nav-actions { display: flex; align-items: center; gap: 18px; }
.header-search { position: relative; display: flex; align-items: center; }
.header-search .search-toggle {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 0; background: transparent; color: var(--c-ink);
  font-size: 1.05rem; cursor: pointer; border-radius: 6px;
  transition: color .2s ease, background-color .2s ease;
}
.header-search .search-toggle:hover { color: var(--c-accent-strong); }
.header-search .search-form {
  display: flex;
  align-items: center;
  width: 0;
  opacity: 0;
  overflow: hidden;
  transition: width .3s ease, opacity .3s ease, margin-left .3s ease;
  margin-left: 0;
}
.header-search .search-form.open { width: 220px; opacity: 1; margin-left: 8px; }
.header-search .search-form input {
  width: 100%;
  height: 36px;
  border: 1px solid var(--c-line);
  border-radius: 6px;
  padding: 0 12px;
  font-size: .875rem;
  background: var(--c-surface);
  color: var(--c-ink);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.header-search .search-form input:focus { outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(217,142,50,.14); }
.nav-login { font-size: .9375rem; font-weight: 600; color: var(--c-muted); white-space: nowrap; }
.nav-login:hover { color: var(--c-accent-strong); }
.mobile-search input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--c-line);
  border-radius: 6px;
  padding: 0 14px;
  font-size: .9375rem;
  background: var(--c-surface);
  color: var(--c-ink);
}
.mobile-search input:focus { outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(217,142,50,.14); }
.site-header .navbar-toggler { border: 0; font-size: 1.3rem; color: var(--c-ink); padding: 4px 8px; box-shadow: none; }
.site-header .navbar-toggler:focus { box-shadow: none; outline: 2px solid var(--c-accent); outline-offset: 2px; }
@media (max-width: 991.98px) {
  .site-header { height: auto; }
  .site-header.scrolled { height: auto; }
  .site-header .navbar { padding-top: 8px; padding-bottom: 8px; }
  .site-header.scrolled .navbar { padding-top: 8px; padding-bottom: 8px; }
  .site-header .navbar-collapse { background: var(--c-bg); padding: 16px 8px 20px; border-radius: 12px; margin-top: 8px; border: 1px solid var(--c-line); box-shadow: var(--shadow-2); }
  .site-header .navbar-nav { align-items: flex-start; gap: 4px; margin-bottom: 12px; }
  .site-header .navbar-nav .nav-link { padding: 10px 12px; font-size: 1rem; width: 100%; }
  .site-header .navbar-nav .nav-link::after { display: none; }
  .nav-actions { width: 100%; justify-content: flex-start; gap: 14px; padding: 8px 12px; border-top: 1px solid var(--c-line); }
  .mobile-search { padding: 8px 12px 4px; }
  .header-search .search-form.open { width: 170px; }
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  background: var(--c-dark-block);
  padding: 92px 0 76px;
  color: var(--c-on-dark);
  overflow: hidden;
}
.page-hero .hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center 30%;
  opacity: .4;
}
.page-hero .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(18,17,16,.94) 25%, rgba(18,17,16,.76) 60%, rgba(18,17,16,.48) 100%);
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumbs { display: flex; align-items: center; gap: 8px; font-size: .8125rem; color: var(--c-on-dark-muted); margin-bottom: 22px; flex-wrap: wrap; }
.breadcrumbs a { color: var(--c-on-dark-muted); }
.breadcrumbs a:hover { color: var(--c-accent); }
.breadcrumbs .sep { opacity: .5; }
.breadcrumbs .current { color: var(--c-on-dark); }
.page-hero h1 { color: var(--c-on-dark); font-size: clamp(2.1rem, 4vw, 3.1rem); font-weight: 800; margin-bottom: 14px; letter-spacing: -.01em; }
.page-hero .lead-text { max-width: 640px; font-size: 1.0625rem; color: var(--c-on-dark-muted); line-height: 1.8; margin-bottom: 22px; }
.page-hero .hero-tags { display: flex; gap: 10px; flex-wrap: wrap; }
.page-hero .hero-tags span {
  font-size: .75rem;
  color: var(--c-accent);
  border: 1px solid rgba(217,142,50,.4);
  background: rgba(217,142,50,.08);
  padding: 4px 14px;
  border-radius: 999px;
  line-height: 1.4;
}
.hero-wave { position: absolute; right: 5%; bottom: 44px; display: flex; align-items: flex-end; gap: 7px; z-index: 1; opacity: .45; pointer-events: none; }
.hero-wave i { width: 2px; background: var(--c-accent); border-radius: 2px; transform-origin: bottom; animation: wavePulse .8s ease-in-out infinite alternate; }
@keyframes wavePulse { from { transform: scaleY(.8); opacity: .35; } to { transform: scaleY(1); opacity: .9; } }

/* ===== Tutorial Paths ===== */
.tutorial-paths { padding: clamp(64px, 8vw, 96px) 0 56px; }
.path-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); }
.path-item { padding: 40px 20px 40px 0; position: relative; }
.path-item + .path-item { border-left: 1px solid var(--c-line); padding-left: 40px; }
.path-item .path-num { font-variant-numeric: tabular-nums; font-size: .8125rem; font-weight: 700; color: var(--c-accent-strong); letter-spacing: .08em; display: block; margin-bottom: 14px; }
.path-item h3 { font-size: 1.2rem; margin-bottom: 8px; }
.path-item p { margin: 0; color: var(--c-muted); font-size: .9375rem; line-height: 1.7; }
@media (max-width: 767.98px) {
  .path-grid { grid-template-columns: 1fr; gap: 0; }
  .path-item { padding: 28px 0; }
  .path-item + .path-item { border-left: 0; border-top: 1px solid var(--c-line); padding-left: 0; }
}

/* ===== Timeline ===== */
.timeline-section { padding: 56px 0 clamp(64px, 8vw, 100px); background: var(--c-surface); border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); }
.timeline-wrap { position: relative; max-width: 880px; margin: 0 auto; padding-left: 36px; }
.timeline-wrap::before { content: ''; position: absolute; left: 7px; top: 8px; bottom: 32px; width: 2px; background: var(--c-line); }
.timeline-item { position: relative; margin-bottom: 36px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker { position: absolute; left: -36px; top: 12px; width: 17px; height: 17px; display: flex; align-items: center; justify-content: center; }
.timeline-marker .dot { width: 11px; height: 11px; border-radius: 50%; background: var(--c-accent); border: 3px solid var(--c-surface); box-shadow: 0 0 0 2px var(--c-accent), 0 0 0 4px rgba(217,142,50,.15); }
.timeline-card {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 12px;
  padding: 30px 32px 0;
  box-shadow: var(--shadow-1);
  transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
  overflow: hidden;
}
.timeline-card:hover { box-shadow: var(--shadow-2); transform: translateY(-2px); border-color: rgba(217,142,50,.25); }
.timeline-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 12px; }
.timeline-num { font-variant-numeric: tabular-nums; font-size: .8125rem; font-weight: 700; color: var(--c-accent-strong); letter-spacing: .08em; line-height: 1.6; }
.timeline-title h3 { font-size: 1.35rem; font-weight: 700; margin: 0; }
.timeline-title span { font-size: .8125rem; color: var(--c-muted); letter-spacing: .02em; }
.timeline-card p { color: var(--c-muted); font-size: .9688rem; line-height: 1.8; margin-bottom: 18px; max-width: 92%; }
.timeline-cover { display: block; width: 100%; height: 220px; object-fit: cover; border-radius: 8px 8px 0 0; margin: 12px -32px 0; max-width: calc(100% + 64px); border-top: 1px solid var(--c-line); }
@media (max-width: 575.98px) {
  .timeline-wrap { padding-left: 24px; }
  .timeline-marker { left: -24px; }
  .timeline-card { padding: 24px 20px 0; }
  .timeline-cover { margin: 10px -20px 0; max-width: calc(100% + 40px); height: 170px; }
}

/* ===== Resource Card ===== */
.resource-section { padding: clamp(64px, 8vw, 100px) 0; }
.resource-card {
  display: grid;
  grid-template-columns: 6fr 5fr;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-1);
  transition: box-shadow .3s ease;
}
.resource-card:hover { box-shadow: var(--shadow-2); }
.resource-body { padding: 48px 56px; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }
.resource-body h2 { font-size: clamp(1.6rem, 2.6vw, 2.2rem); margin-bottom: 14px; }
.resource-body p { color: var(--c-muted); font-size: 1rem; line-height: 1.8; margin-bottom: 28px; max-width: 480px; }
.resource-media { position: relative; min-height: 260px; }
.resource-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 767.98px) {
  .resource-card { grid-template-columns: 1fr; }
  .resource-body { padding: 32px 24px; }
  .resource-media { min-height: 200px; }
  .resource-media img { position: static; }
}

/* ===== Stats ===== */
.stats-section { padding: 0 0 clamp(64px, 8vw, 96px); }
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; border-top: 1px solid var(--c-line); }
.stat-item { padding: 36px 20px 12px 0; }
.stat-item + .stat-item { border-left: 1px solid var(--c-line); padding-left: 30px; }
.stat-num { font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; font-variant-numeric: tabular-nums; font-size: 2.4rem; font-weight: 700; color: var(--c-ink); display: block; line-height: 1.2; margin-bottom: 8px; }
.stat-label { font-size: .875rem; color: var(--c-muted); }
@media (max-width: 991.98px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 0; }
  .stat-item:nth-child(3) { border-left: 0; }
  .stat-item { padding-left: 0 !important; }
}
@media (max-width: 575.98px) {
  .stats-row { grid-template-columns: 1fr 1fr; }
  .stat-num { font-size: 2rem; }
}

/* ===== FAQ ===== */
.faq-section { padding: clamp(64px, 8vw, 100px) 0; background: var(--c-surface); border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--c-line); }
.faq-item:first-child { border-top: 1px solid var(--c-line); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 8px;
  background: transparent;
  border: 0;
  text-align: left;
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--c-ink);
  cursor: pointer;
  transition: color .2s ease;
}
.faq-question:hover { color: var(--c-accent-strong); }
.faq-question i { font-size: 1.1rem; color: var(--c-accent); transition: transform .3s ease, color .2s ease; flex-shrink: 0; }
.faq-item.open .faq-question i { transform: rotate(45deg); }
.faq-item.open .faq-question { color: var(--c-accent-strong); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease, padding .35s ease; padding: 0 8px; }
.faq-item.open .faq-answer { max-height: 320px; padding: 0 8px 20px; }
.faq-answer p { margin: 0; color: var(--c-muted); font-size: .9688rem; line-height: 1.8; }

/* ===== CTA ===== */
.cta-section { position: relative; padding: clamp(64px, 9vw, 112px) 0; background: var(--c-dark-block); color: var(--c-on-dark); overflow: hidden; }
.cta-section::before {
  content: '';
  position: absolute;
  right: -10%;
  top: 50%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle at center, rgba(217,142,50,.12) 0%, transparent 65%);
  pointer-events: none;
}
.cta-inner { position: relative; z-index: 2; text-align: center; max-width: 640px; margin: 0 auto; }
.cta-inner h2 { color: var(--c-on-dark); font-size: clamp(1.9rem, 3vw, 2.8rem); margin-bottom: 16px; }
.cta-inner p { color: var(--c-on-dark-muted); font-size: 1.0625rem; line-height: 1.8; margin-bottom: 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-wave { position: absolute; left: 6%; bottom: 32px; display: flex; align-items: flex-end; gap: 6px; opacity: .18; pointer-events: none; }
.cta-wave i { width: 2px; background: var(--c-accent); border-radius: 2px; }
@media (max-width: 575.98px) {
  .cta-actions .btn { width: 100%; }
}

/* ===== Footer ===== */
.site-footer { background: var(--c-dark-block); color: var(--c-on-dark-muted); border-top: 1px solid var(--c-accent); padding: 64px 0 32px; }
.footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .brand { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; }
.footer-brand .brand-text { font-size: 1.25rem; font-weight: 800; color: var(--c-on-dark); }
.footer-brand .brand-tag { font-size: .6875rem; font-weight: 700; color: var(--c-accent); background: rgba(217,142,50,.12); border: 1px solid rgba(217,142,50,.28); border-radius: 4px; padding: 2px 7px; line-height: 1.2; }
.footer-brand p { font-size: .9375rem; line-height: 1.75; color: var(--c-on-dark-muted); margin: 0; max-width: 300px; }
.footer-col h4 { font-size: .9375rem; font-weight: 700; color: var(--c-on-dark); margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: .875rem; color: var(--c-on-dark-muted); transition: color .2s ease; }
.footer-col ul li a:hover { color: var(--c-accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 16px; border-top: 1px solid rgba(245,242,235,.1); padding-top: 24px; font-size: .8125rem; flex-wrap: wrap; }
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { color: var(--c-on-dark-muted); }
.footer-legal a:hover { color: var(--c-accent); }
@media (max-width: 991.98px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 575.98px) {
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-legal { flex-wrap: wrap; gap: 12px; }
}

/* ===== Reveal Animation ===== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.revealed { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

/* roulang page: category3 */
:root {
            --c-bg: #F5F2EB;
            --c-surface: #FFFFFF;
            --c-ink: #1A1816;
            --c-muted: #6F6A5E;
            --c-line: rgba(26, 24, 22, .12);
            --c-accent: #D98E32;
            --c-accent-strong: #BF6F1C;
            --c-on-accent: #1A1816;
            --c-dark-block: #121110;
            --c-on-dark: #F5F2EB;
            --c-on-dark-muted: #A9A193;
            --shadow-1: 0 1px 2px rgba(18, 17, 16, .05);
            --shadow-2: 0 8px 24px rgba(18, 17, 16, .08);
            --shadow-3: 0 16px 40px rgba(18, 17, 16, .12);
            --radius-btn: 6px;
            --radius-card: 12px;
            --radius-img: 8px;
            --font-sans: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            padding-top: 72px;
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--c-ink);
            background: var(--c-bg);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        img {
            max-width: 100%;
            height: auto;
        }

        a {
            color: var(--c-ink);
            text-decoration: none;
            transition: color .2s ease;
        }

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

        .container {
            max-width: 1200px;
        }

        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            padding: 0 24px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid transparent;
            transition: background .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
            line-height: 1;
            white-space: nowrap;
        }

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

        .btn:active {
            transform: translateY(0);
        }

        .btn:focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 2px;
        }

        .btn-accent {
            background: var(--c-accent);
            color: var(--c-on-accent);
            border-color: var(--c-accent);
        }

        .btn-accent:hover {
            background: var(--c-accent-strong);
            color: #fff;
            border-color: var(--c-accent-strong);
            box-shadow: var(--shadow-2);
        }

        .eyebrow {
            display: inline-block;
            font-size: .75rem;
            letter-spacing: .12em;
            color: var(--c-accent-strong);
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-block {
            padding: clamp(64px, 9vw, 112px) 0;
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: clamp(1.7rem, 3vw, 2.4rem);
            font-weight: 800;
            letter-spacing: -.02em;
            margin-bottom: 12px;
            line-height: 1.25;
        }

        .section-head p {
            color: var(--c-muted);
            max-width: 640px;
            margin: 0;
        }

        /* ---------- Header / Nav ---------- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(245, 242, 235, .96);
            border-bottom: 1px solid transparent;
            transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
        }

        .site-header.scrolled {
            background: rgba(245, 242, 235, .92);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            box-shadow: var(--shadow-1);
            border-bottom: 1px solid var(--c-line);
        }

        .site-header .navbar {
            min-height: 72px;
            padding: 0;
            transition: min-height .3s ease;
        }

        .site-header.scrolled .navbar {
            min-height: 56px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
            margin: 0;
        }

        .brand-mark {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .brand-text {
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--c-ink);
            letter-spacing: -.02em;
        }

        .brand-tag {
            font-size: .6875rem;
            background: rgba(217, 142, 50, .14);
            color: var(--c-accent-strong);
            border-radius: 4px;
            padding: 2px 6px;
            font-weight: 600;
            letter-spacing: .04em;
            white-space: nowrap;
        }

        .navbar-nav {
            gap: 4px;
        }

        .navbar-nav .nav-link {
            font-size: .9375rem;
            font-weight: 500;
            color: var(--c-ink);
            padding: 8px 14px;
            border-radius: 6px;
            position: relative;
            transition: color .2s ease;
        }

        .navbar-nav .nav-link:hover {
            color: var(--c-accent-strong);
        }

        .navbar-nav .nav-link.active {
            font-weight: 700;
            color: var(--c-ink);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--c-accent);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-login {
            font-size: .9375rem;
            color: var(--c-ink);
            font-weight: 500;
            transition: color .2s ease;
        }

        .nav-login:hover {
            color: var(--c-accent-strong);
        }

        .header-search {
            position: relative;
        }

        .search-toggle {
            background: none;
            border: 0;
            color: var(--c-ink);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            font-size: 1.1rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background .2s ease, color .2s ease;
        }

        .search-toggle:hover {
            background: rgba(217, 142, 50, .15);
            color: var(--c-accent-strong);
        }

        .search-form {
            position: absolute;
            right: 38px;
            top: 50%;
            transform: translateY(-50%) scaleX(.8);
            transform-origin: right center;
            opacity: 0;
            pointer-events: none;
            transition: opacity .2s ease, transform .2s ease;
        }

        .search-form.open {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(-50%) scaleX(1);
        }

        .search-form input {
            width: 220px;
            height: 38px;
            border: 1px solid var(--c-line);
            border-radius: 6px;
            padding: 0 12px;
            font-size: .875rem;
            font-family: var(--font-sans);
            background: var(--c-surface);
            transition: border-color .2s ease, box-shadow .2s ease;
        }

        .search-form input:focus {
            outline: 0;
            border-color: var(--c-accent);
            box-shadow: 0 0 0 3px rgba(217, 142, 50, .18);
        }

        .mobile-search input {
            width: 100%;
            height: 42px;
            border: 1px solid var(--c-line);
            border-radius: 6px;
            padding: 0 14px;
            font-size: .9375rem;
            font-family: var(--font-sans);
        }

        .mobile-search input:focus {
            outline: 0;
            border-color: var(--c-accent);
            box-shadow: 0 0 0 3px rgba(217, 142, 50, .18);
        }

        .navbar-toggler {
            border: 1px solid var(--c-line);
            border-radius: 6px;
            padding: 6px 10px;
        }

        .navbar-toggler i {
            font-size: 1.4rem;
            line-height: 1;
            color: var(--c-ink);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(217, 142, 50, .2);
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: var(--c-surface);
                border: 1px solid var(--c-line);
                border-radius: 12px;
                margin-top: 12px;
                padding: 16px;
                box-shadow: var(--shadow-2);
            }

            .nav-actions {
                display: none;
            }

            .navbar-nav .nav-link {
                padding: 10px 12px;
            }

            .navbar-nav .nav-link.active::after {
                left: 12px;
                right: auto;
                width: 18px;
            }
        }

        /* ---------- Page Hero ---------- */
        .page-hero {
            position: relative;
            min-height: 280px;
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
            color: var(--c-on-dark);
            padding: 84px 0;
        }

        .page-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(18, 17, 16, .92) 0%, rgba(18, 17, 16, .74) 55%, rgba(18, 17, 16, .45) 100%);
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            font-size: .8125rem;
            color: var(--c-on-dark-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: var(--c-on-dark-muted);
            transition: color .2s ease;
        }

        .breadcrumb a:hover {
            color: var(--c-accent);
        }

        .breadcrumb span {
            color: var(--c-on-dark-muted);
            opacity: .6;
        }

        .page-hero h1 {
            font-size: clamp(2.2rem, 4.5vw, 3.4rem);
            font-weight: 800;
            margin: 0 0 10px;
            letter-spacing: -.02em;
            line-height: 1.15;
        }

        .page-hero p {
            font-size: 1.0625rem;
            color: var(--c-on-dark-muted);
            max-width: 560px;
            margin: 0;
        }

        /* ---------- Service Cards ---------- */
        .service-cards {
            background: var(--c-bg);
        }

        .service-card {
            background: var(--c-surface);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-card);
            padding: 40px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-1);
            transition: box-shadow .3s ease, transform .3s ease;
            overflow: hidden;
        }

        .service-card:hover {
            box-shadow: var(--shadow-3);
        }

        .service-card:last-child {
            margin-bottom: 0;
        }

        .service-image {
            border-radius: var(--radius-img);
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .service-card:hover .service-image {
            transform: scale(1.03);
        }

        .service-content h2 {
            font-size: 1.6rem;
            font-weight: 800;
            margin: 8px 0 16px;
            letter-spacing: -.02em;
            line-height: 1.25;
        }

        .service-content p {
            color: var(--c-muted);
            margin-bottom: 12px;
        }

        .service-list {
            list-style: none;
            padding: 0;
            margin: 16px 0 0;
        }

        .service-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 10px 0;
            border-bottom: 1px dashed var(--c-line);
            font-size: .9375rem;
            line-height: 1.65;
        }

        .service-list li:last-child {
            border-bottom: 0;
        }

        .service-list i {
            color: var(--c-accent);
            font-size: 1.05rem;
            line-height: 1.5;
        }

        @media (max-width: 767.98px) {
            .service-card {
                padding: 24px;
            }
        }

        /* ---------- FAQ Section ---------- */
        .faq-section {
            background: var(--c-surface);
            border-top: 1px solid var(--c-line);
        }

        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
        }

        .accordion {
            --bs-accordion-border-width: 0;
            --bs-accordion-bg: transparent;
            --bs-accordion-btn-bg: transparent;
            --bs-accordion-active-bg: transparent;
            --bs-accordion-btn-focus-box-shadow: none;
        }

        .accordion-item {
            background: transparent;
            border: 0;
            border-bottom: 1px solid var(--c-line);
            border-radius: 0 !important;
        }

        .accordion-item:last-child {
            border-bottom: 0;
        }

        .accordion-button {
            font-weight: 700;
            color: var(--c-ink);
            background: transparent;
            padding: 22px 36px 22px 0;
            font-size: 1.0625rem;
            font-family: var(--font-sans);
            box-shadow: none;
            transition: color .2s ease;
        }

        .accordion-button:hover {
            color: var(--c-accent-strong);
        }

        .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid rgba(217, 142, 50, .35);
            outline-offset: -2px;
            border-radius: 6px;
        }

        .accordion-button:not(.collapsed) {
            color: var(--c-accent-strong);
            background: transparent;
            box-shadow: none;
        }

        .accordion-button::after {
            background-image: none;
            content: '+';
            font-size: 1.6rem;
            font-weight: 300;
            color: var(--c-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform .3s ease, color .3s ease;
            width: 24px;
            height: 24px;
            position: absolute;
            right: 0;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            color: var(--c-accent-strong);
        }

        .accordion-body {
            padding: 0 0 24px;
            color: var(--c-muted);
            font-size: .9375rem;
            max-width: 760px;
            line-height: 1.8;
        }

        /* ---------- Support Form ---------- */
        .support-section {
            background: var(--c-dark-block);
            color: var(--c-on-dark);
        }

        .support-panel {
            max-width: 1000px;
            margin: 0 auto;
            text-align: center;
        }

        .support-panel .eyebrow {
            color: var(--c-accent);
        }

        .support-panel h2 {
            color: var(--c-on-dark);
            font-size: clamp(1.7rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -.02em;
        }

        .support-panel>p {
            color: var(--c-on-dark-muted);
            margin-bottom: 40px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .support-form {
            text-align: left;
        }

        .support-form .form-label {
            color: var(--c-on-dark-muted);
            font-size: .8125rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .support-form .form-control,
        .support-form .form-select {
            height: 44px;
            border-radius: 6px;
            border: 1px solid rgba(245, 242, 235, .2);
            background: rgba(245, 242, 235, .06);
            color: var(--c-on-dark);
            font-size: .9375rem;
            font-family: var(--font-sans);
            padding: 0 14px;
            transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
        }

        .support-form .form-control::placeholder {
            color: rgba(245, 242, 235, .4);
        }

        .support-form .form-select {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23A9A193' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
            background-repeat: no-repeat;
            background-position: right .75rem center;
            background-size: 16px 12px;
        }

        .support-form .form-select option {
            color: var(--c-ink);
            background: var(--c-surface);
        }

        .support-form .form-control:focus,
        .support-form .form-select:focus {
            border-color: var(--c-accent);
            outline: 0;
            box-shadow: 0 0 0 3px rgba(217, 142, 50, .2);
            background: rgba(245, 242, 235, .08);
            color: var(--c-on-dark);
        }

        .support-form .btn {
            margin-top: 0;
            width: 100%;
        }

        @media (max-width: 991.98px) {
            .support-form .col-lg-3 {
                margin-bottom: 12px;
            }
        }

        @media (min-width: 992px) {
            .support-form .btn {
                width: 100%;
            }
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: var(--c-dark-block);
            color: var(--c-on-dark-muted);
            border-top: 1px solid var(--c-accent);
        }

        .footer-top {
            padding: 64px 0 40px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }

        .footer-brand .brand {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }

        .footer-brand .brand .brand-text {
            color: var(--c-on-dark);
        }

        .footer-brand p {
            font-size: .875rem;
            max-width: 320px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .footer-col h4 {
            color: var(--c-on-dark);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col li {
            margin-bottom: 10px;
        }

        .footer-col a {
            font-size: .875rem;
            color: var(--c-on-dark-muted);
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: var(--c-accent);
        }

        .footer-bottom {
            padding: 24px 0;
            border-top: 1px solid rgba(245, 242, 235, .1);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: .8125rem;
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-legal {
            display: flex;
            gap: 20px;
        }

        .footer-legal a {
            color: var(--c-on-dark-muted);
            transition: color .2s ease;
        }

        .footer-legal a:hover {
            color: var(--c-accent);
        }

        @media (max-width: 991.98px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 575.98px) {
            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .footer-legal {
                justify-content: center;
            }
        }

        /* ---------- Reveal Motion ---------- */
        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity .6s ease, transform .6s ease;
        }

        .reveal.revealed {
            opacity: 1;
            transform: none;
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }

            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: .01ms !important;
            }

            .reveal {
                opacity: 1;
                transform: none;
            }
        }