/* roulang page: index */
:root {
  --paper: #F7F4EE;
  --surface: #FFFFFF;
  --surface-dim: #EEE9E0;
  --ink: #181B18;
  --ink-2: #3F4440;
  --muted: #8A8D85;
  --line: #DCD8CF;
  --line-strong: #B9B2A4;
  --primary: #0E5B4C;
  --primary-deep: #094238;
  --primary-soft: rgba(14, 91, 76, 0.1);
  --accent: #B57A3A;
  --accent-deep: #8C5A26;
  --dark: #111714;
  --dark-soft: #1C2521;
  --focus: #2E8B74;
  --danger: #A33A25;
  --container-pad: clamp(20px, 4vw, 40px);
  --block-space: clamp(72px, 10vw, 128px);
  --radius-small: 4px;
  --radius-card: 6px;
  --radius-panel: 8px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "STSong", "SimSun", serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
body, p, h1, h2, h3, h4, ul { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-deep); }
img { display: block; max-width: 100%; object-fit: cover; }
button, input, select, textarea { font-family: inherit; }
.price-font { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}
.container-wide {
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}
.section { padding-top: var(--block-space); padding-bottom: var(--block-space); }
.section-dim { background: var(--surface-dim); }
.section-dark { background: var(--dark); color: var(--paper); }
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 18px;
  border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; color: #fff; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  text-wrap: balance;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--primary);
}
.section-heading {
  margin-bottom: clamp(40px, 6vw, 72px);
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 32px;
  align-items: end;
}
.section-title {
  margin-top: 14px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
}
.section-dark .section-title { color: var(--paper); }
.section-desc {
  margin-top: 18px;
  max-width: 680px;
  color: var(--ink-2);
  font-size: 1rem;
  line-height: 1.9;
}
.section-dark .section-desc { color: #C4CAC4; }
.heading-meta {
  text-align: right;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.8;
}
@media (max-width: 767px) {
  .section-heading { grid-template-columns: 1fr; align-items: start; }
  .heading-meta { text-align: left; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  font-size: .95rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-deep); color: #fff; }
.btn-outline { background: transparent; border-color: var(--line-strong); color: var(--ink); }
.btn-outline:hover { background: var(--primary-soft); border-color: var(--primary); color: var(--primary-deep); }
.btn-on-dark { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-on-dark:hover { background: var(--primary-deep); color: #fff; }
.btn-ghost { background: transparent; border-color: rgba(255,255,255,.55); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.08); border-color: #fff; color: #fff; }
.btn-sm { min-height: 38px; padding: 0 14px; font-size: .88rem; }
.btn:active { transform: scale(.98); }
.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--primary);
}
.btn-text::after {
  content: "→";
  transition: transform .2s ease;
}
.btn-text:hover { color: var(--primary-deep); }
.btn-text:hover::after { transform: translateX(4px); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1 !important; transform: none !important; }
}

.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 30;
}
.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 0;
}
.brand-symbol {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--primary);
  background: var(--surface);
}
.brand-symbol svg { width: 28px; height: 28px; }
.brand-cn {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink);
  display: block;
  line-height: 1.2;
}
.brand-line {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.brand-en {
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--muted);
  white-space: nowrap;
  font-weight: 600;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}
.header-actions .btn {
  background: var(--primary);
  color: #fff;
}
.header-actions .btn:hover { background: var(--primary-deep); color: #fff; }
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(247, 244, 238, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
}
.nav-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 52px;
}
.nav-scroll::-webkit-scrollbar { display: none; }
.nav-link {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  height: 52px;
  padding: 0 18px;
  font-size: .93rem;
  font-weight: 600;
  color: var(--ink-2);
  border-bottom: 2px solid transparent;
  text-decoration: none;
  transition: color .2s, border-color .2s, background .2s;
}
.nav-link:hover { color: var(--primary); }
.nav-link.is-active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: var(--primary-soft);
}
@media (max-width: 767px) {
  .header-main { padding-top: 8px; padding-bottom: 8px; min-height: 56px; }
  .brand-cn { font-size: 1.15rem; }
  .brand-en { display: none; }
  .brand-symbol { width: 32px; height: 32px; flex-basis: 32px; }
  .brand-symbol svg { width: 22px; height: 22px; }
  .header-actions .btn { min-height: 34px; padding: 0 12px; font-size: .85rem; }
  .nav-link { padding: 0 14px; }
}

.hero {
  position: relative;
  background: var(--dark);
  color: #fff;
  overflow: hidden;
  padding: clamp(64px, 8vw, 112px) 0 50px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(17,23,20,.97) 0%, rgba(17,23,20,.82) 42%, rgba(17,23,20,.55) 100%), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
}
.hero::after {
  content: "";
  position: absolute;
  right: -180px;
  top: -190px;
  width: 460px;
  height: 460px;
  border: 1px solid rgba(181,122,58,.35);
  border-radius: 50%;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}
.hero-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #C7D2C5;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
}
.hero-kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--accent);
}
.hero h1 {
  margin-top: 22px;
  font-size: clamp(2.8rem, 7vw, 4.6rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--paper);
}
.hero-sub {
  margin-top: 10px;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.6;
  color: #F0EBDD;
}
.hero-text {
  max-width: 620px;
  margin-top: 20px;
  color: #C4CAC4;
  font-size: 1rem;
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}
.hero-facts {
  margin-top: clamp(44px, 6vw, 72px);
  border-top: 1px solid rgba(255,255,255,.16);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
  padding-top: 22px;
}
.hero-fact strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}
.hero-fact span {
  display: block;
  margin-top: 6px;
  color: #969E98;
  font-size: 13px;
  line-height: 1.6;
}
.hero-visual {
  position: relative;
}
.access-figure {
  position: relative;
  border-radius: var(--radius-panel);
  overflow: hidden;
  min-height: 430px;
  box-shadow: 0 30px 70px rgba(0,0,0,.28);
}
.access-figure img {
  width: 100%;
  height: 100%;
  min-height: 430px;
  object-fit: cover;
}
.access-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(17,23,20,.05) 0%, rgba(17,23,20,.16) 100%);
}
.access-card-1 {
  position: absolute;
  left: 22px;
  bottom: 22px;
  background: rgba(255,255,255,.95);
  color: var(--ink);
  border-radius: var(--radius-card);
  padding: 16px 18px;
  min-width: 210px;
  box-shadow: 0 18px 40px rgba(0,0,0,.15);
}
.access-card-1 .label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .05em;
}
.access-card-1 .dot {
  width: 7px;
  height: 7px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(14,91,76,.15);
}
.access-card-1 strong {
  display: block;
  margin-top: 8px;
  font-family: var(--font-serif);
  font-size: 1.05rem;
}
.access-card-2 {
  position: absolute;
  right: 18px;
  top: 20px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-card);
  padding: 12px 14px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 12px 30px rgba(14,91,76,.24);
}
.access-card-2 .arrow { font-size: 16px; }
.access-ring {
  position: absolute;
  width: 120px;
  height: 120px;
  right: -30px;
  bottom: -30px;
  border: 1px solid rgba(181,122,58,.65);
  border-radius: 50%;
}
@media (max-width: 1023px) {
  .hero-inner { grid-template-columns: 1fr; }
  .access-figure { max-width: 560px; }
}
@media (max-width: 667px) {
  .hero { padding-top: 48px; }
  .hero-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
  .access-figure, .access-figure img { min-height: 320px; }
  .access-card-2 { top: 12px; right: 10px; }
}

.clients-strip {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.clients-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  justify-content: space-between;
  align-items: center;
  padding-top: 22px;
  padding-bottom: 22px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
}

.capability-section { background: var(--paper); }
.capability-list {
  border-top: 1px solid var(--line-strong);
}
.cap-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 240px minmax(0, .35fr);
  gap: 28px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
  transition: background .2s ease, padding-left .2s ease;
}
.cap-row:hover { background: linear-gradient(90deg, rgba(14,91,76,.045), transparent 75%); padding-left: 10px; }
.cap-index {
  font-family: var(--font-serif);
  color: var(--accent-deep);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: .03em;
  display: flex;
  align-items: center;
  gap: 12px;
}
.cap-index::after { content: ""; width: 22px; height: 1px; background: var(--line-strong); display: inline-block; }
.cap-body h3 { font-size: 1.3rem; font-weight: 700; color: var(--ink); }
.cap-body p { margin-top: 10px; color: var(--ink-2); line-height: 1.9; max-width: 720px; }
.cap-cta { text-align: right; }
@media (min-width: 1024px) {
  .cap-glance { display: flex; align-items: flex-start; justify-content: flex-start; gap: 14px; }
}
@media (max-width: 1023px) {
  .cap-row { grid-template-columns: 80px minmax(0, 1fr); gap: 16px 20px; }
  .cap-cta { grid-column: 2; text-align: left; }
}
@media (max-width: 560px) {
  .cap-row { grid-template-columns: 1fr; gap: 12px; padding: 30px 0; }
  .cap-index { font-size: 1rem; }
  .cap-cta { grid-column: auto; }
}

.advantage-section {
  background: var(--dark);
  color: var(--paper);
}
.advantage-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  margin-top: 28px;
}
.advantage-cell {
  border-top: 1px solid rgba(255,255,255,.16);
  padding-top: 22px;
  position: relative;
}
.advantage-cell::after {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  background: var(--accent);
  margin-top: 20px;
}
.adv-kicker { font-size: 12px; letter-spacing: .08em; color: #98A099; text-transform: uppercase; }
.adv-value {
  margin-top: 14px;
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}
.adv-note {
  margin-top: 12px;
  color: #B7BFB8;
  font-size: .93rem;
  line-height: 1.8;
}
@media (max-width: 1023px) {
  .advantage-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
}
@media (max-width: 520px) {
  .advantage-list { grid-template-columns: 1fr; }
}

.case-section { background: var(--surface-dim); }
.case-stack {
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 7vw, 90px);
}
.case-row {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}
.case-row + .case-row {
  border-top: 1px solid var(--line);
  padding-top: clamp(48px, 7vw, 90px);
}
.case-media {
  position: relative;
  border-radius: var(--radius-panel);
  overflow: hidden;
  box-shadow: 0 16px 32px rgba(20,24,20,.1);
  background: var(--surface);
}
.case-media img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  transition: transform .4s ease;
}
.case-row:hover .case-media img { transform: scale(1.02); }
.case-media figcaption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  background: rgba(17,23,20,.78);
  color: #fff;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 3px;
  letter-spacing: .02em;
}
.case-row:nth-of-type(even) .case-media { order: 2; }
.case-kicker { color: var(--accent-deep); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.case-copy h3 {
  margin-top: 16px;
  font-size: clamp(1.3rem, 2.5vw, 1.9rem);
  line-height: 1.4;
  font-weight: 700;
}
.case-copy p {
  margin-top: 16px;
  color: var(--ink-2);
  line-height: 1.95;
  max-width: 560px;
}
.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 22px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.case-meta span:first-child { color: var(--primary); font-weight: 600; }
@media (max-width: 900px) {
  .case-row { grid-template-columns: 1fr; }
  .case-row:nth-of-type(even) .case-media { order: 0; }
}

.path-section { background: var(--paper); }
.path-layout {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(32px, 6vw, 90px);
  align-items: start;
}
.path-intro {
  position: sticky;
  top: 130px;
}
.path-aside-note {
  margin-top: 26px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  color: var(--ink-2);
  font-size: .94rem;
  line-height: 1.9;
}
.path-list { border-top: 1px solid var(--line-strong); }
.step-item { border-bottom: 1px solid var(--line); }
.step-summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0 10px;
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ink);
  background: transparent;
  border: 0;
  cursor: pointer;
  list-style: none;
}
.step-summary::-webkit-details-marker { display: none; }
.step-title { display: flex; align-items: baseline; gap: 18px; }
.step-no { color: var(--accent-deep); font-family: var(--font-serif); font-size: .8rem; letter-spacing: .04em; }
details .step-plus {
  font-size: 1.5rem;
  font-weight: 300;
  line-height: 1;
  color: var(--primary);
  transition: transform .2s ease;
}
.step-item[open] .step-plus { transform: rotate(45deg); }
.step-content {
  padding-bottom: 28px;
  color: var(--ink-2);
  line-height: 1.9;
  max-width: 660px;
  font-size: .97rem;
}
.step-content a { margin-top: 14px; display: inline-flex; }
@media (max-width: 1023px) {
  .path-layout { grid-template-columns: 1fr; }
  .path-intro { position: static; }
}

.news-section { background: var(--surface-dim); }
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.news-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 30px rgba(20,24,20,.12);
  border-color: var(--line-strong);
}
.news-thumb {
  display: block;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.news-thumb img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform .4s ease;
}
.news-card:hover .news-thumb img { transform: scale(1.04); }
.news-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 20px 20px 16px;
}
.news-badge {
  align-self: flex-start;
  display: inline-flex;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  border-radius: 3px;
  padding: 4px 9px;
  line-height: 1.3;
}
.news-card h3 {
  margin-top: 14px;
  font-size: 1.06rem;
  line-height: 1.5;
  font-weight: 700;
  font-family: var(--font-sans);
}
.news-card h3 a { color: var(--ink); }
.news-card h3 a:hover { color: var(--primary-deep); }
.news-excerpt {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 10px;
  color: var(--ink-2);
  font-size: .93rem;
  line-height: 1.75;
  min-height: 48px;
}
.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 16px;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--line);
  margin-top: 16px;
}
.news-meta a { color: var(--primary); font-weight: 600; }
.news-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 14px;
  min-height: 230px;
  border: 1px dashed var(--line-strong);
  background: var(--surface);
  border-radius: var(--radius-panel);
  color: var(--muted);
  font-size: .98rem;
}
.news-empty svg { width: 48px; height: 48px; color: var(--line-strong); }
@media (max-width: 1023px) {
  .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .news-grid { grid-template-columns: 1fr; }
}

.faq-section { background: var(--paper); }
.faq-layout {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.35fr);
  gap: clamp(28px, 6vw, 88px);
  align-items: start;
}
.faq-heading-side h2 .section-title? no
.faq-list { border-top: 1px solid var(--line-strong); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 24px 0;
  list-style: none;
  cursor: pointer;
  background: transparent;
  border: 0;
  width: 100%;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  font-family: var(--font-sans);
}
.faq-summary::-webkit-details-marker { display: none; }
.faq-summary:hover { color: var(--primary-deep); }
.faq-plus {
  flex: 0 0 20px;
  height: 20px;
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--primary);
  font-size: 14px;
  line-height: 18px;
  text-align: center;
  transition: transform .24s ease, background .24s ease, color .24s ease;
}
.faq-item[open] .faq-plus {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 0 28px;
  color: var(--ink-2);
  line-height: 1.95;
  max-width: 660px;
}
.faq-answer a { text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 900px) {
  .faq-layout { grid-template-columns: 1fr; }
}

.contact-section {
  position: relative;
  background: var(--dark);
  color: #fff;
  overflow: hidden;
}
.contact-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(17,23,20,.93), rgba(17,23,20,.72)), url('/assets/images/backpic/back-3.png') center / cover no-repeat;
}
.contact-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 620px);
  gap: clamp(32px, 6vw, 88px);
  align-items: center;
}
.contact-lead h2 {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  line-height: 1.25;
  font-weight: 700;
  max-width: 520px;
  color: var(--paper);
}
.contact-lead p {
  color: #B7BFB8;
  margin-top: 22px;
  font-size: 1rem;
  line-height: 1.95;
  max-width: 520px;
}
.contact-points {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}
.contact-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #D2D8D3;
  font-size: .95rem;
}
.contact-points li::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  flex: none;
}
.lead-form {
  background: #FFFFFF;
  border-radius: var(--radius-panel);
  padding: clamp(24px, 4vw, 38px);
  color: var(--ink);
  box-shadow: 0 26px 60px rgba(0,0,0,.2);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}
.form-col { display: flex; flex-direction: column; gap: 8px; }
.form-col.is-full { grid-column: 1 / -1; }
.form-col label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}
.form-col input,
.form-col textarea {
  width: 100%;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-small);
  min-height: 48px;
  padding: 10px 14px;
  color: var(--ink);
  font-size: .95rem;
  transition: border-color .2s, box-shadow .2s;
}
.form-col textarea { min-height: 108px; resize: vertical; }
.form-col input::placeholder,
.form-col textarea::placeholder { color: var(--muted); }
.form-col input:focus,
.form-col textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(14,91,76,.14);
}
.form-col.has-error input,
.form-col.has-error textarea {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(163,58,37,.12);
}
.field-error {
  display: none;
  color: var(--danger);
  font-size: 12px;
  line-height: 1.4;
}
.has-error .field-error { display: block; }
.form-col input.is-valid,
.form-col textarea.is-valid { border-color: var(--primary); }
.form-status {
  display: none;
  grid-column: 1 / -1;
  background: var(--primary-soft);
  border: 1px solid rgba(14,91,76,.2);
  color: var(--primary-deep);
  border-radius: var(--radius-small);
  padding: 12px 14px;
  font-size: .95rem;
}
.form-status.is-visible { display: block; }
.form-actions {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 14px;
}
.form-note { font-size: 13px; color: var(--muted); }
@media (max-width: 1023px) {
  .contact-inner { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .lead-form { grid-template-columns: 1fr; }
  .form-col.is-full { grid-column: auto; }
  .form-actions { grid-column: auto; }
}

.site-footer {
  background: var(--dark-soft);
  color: var(--paper);
  border-top: 1px solid rgba(255,255,255,.08);
}
.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, .8fr) minmax(0, .95fr) minmax(0, 1fr);
  gap: 36px;
  padding-top: clamp(50px, 8vw, 78px);
  padding-bottom: clamp(36px, 6vw, 58px);
}
.footer-brand .brand-cn {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: #fff;
  font-weight: 700;
}
.footer-brand .brand-en {
  display: block;
  color: #8A958E;
  font-size: 11px;
  letter-spacing: .14em;
  margin-top: 4px;
}
.footer-brand p {
  margin-top: 20px;
  color: #A8B0AA;
  font-size: .93rem;
  line-height: 1.9;
  max-width: 300px;
}
.footer-col h4 {
  font-family: var(--font-sans);
  font-size: .95rem;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: .02em;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col a, .footer-col span {
  color: #AEB5AF;
  font-size: .92rem;
  text-decoration: none;
  transition: color .2s;
}
.footer-col a:hover { color: var(--primary); }
.footer-note {
  padding: 12px 14px;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 4px;
  color: #9BA49E;
  font-size: .87rem;
  line-height: 1.8;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 22px;
  padding-bottom: 26px;
  color: #87928B;
  font-size: 13px;
}
.footer-bottom .domain { color: var(--accent); }
@media (max-width: 1023px) {
  .footer-main { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-brand { grid-column: span 3; }
}
@media (max-width: 720px) {
  .footer-main { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s cubic-bezier(.22,.61,.36,1), transform .6s cubic-bezier(.22,.61,.36,1); }
.js .reveal.is-in { opacity: 1; transform: translateY(0); }

/* roulang page: article */
:root {
  --paper: #F7F4EE;
  --surface: #FFFFFF;
  --surface-dim: #EEE9E0;
  --ink: #181B18;
  --ink-2: #3F4440;
  --muted: #8A8D85;
  --line: #DCD8CF;
  --line-strong: #B9B2A4;
  --primary: #0E5B4C;
  --primary-deep: #094238;
  --primary-soft: rgba(14, 91, 76, 0.1);
  --accent: #B57A3A;
  --accent-deep: #8C5A26;
  --dark: #111714;
  --dark-soft: #1C2521;
  --focus: #2E8B74;
  --radius-btn: 4px;
  --radius-card: 6px;
  --radius-panel: 8px;
  --shadow-card: 0 1px 0 rgba(24, 27, 24, 0.02);
  --shadow-hover: 0 16px 30px rgba(20, 24, 20, 0.12);
  --font-ui: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", STSong, "SimSun", serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; }
p { margin: 0 0 1.2em; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 700; }
[hidden] { display: none !important; }
.container {
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(20px, 4vw, 40px);
  padding-right: clamp(20px, 4vw, 40px);
}
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.anim-enabled .reveal {
  opacity: 0;
  transform: translateY(14px);
}
.anim-enabled .reveal.is-visible {
  animation: fadeUp 0.6s cubic-bezier(.22,.61,.36,1) forwards;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  text-align: center;
  line-height: 1.2;
}
.btn-sm { min-height: 38px; padding: 0 18px; font-size: 14px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-deep); }
.btn-outline { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.btn-outline:hover { background: var(--primary-soft); border-color: var(--primary); color: var(--primary-deep); }
.btn-text { background: transparent; padding: 4px 2px; border-radius: 0; color: var(--primary); text-align: left; height: auto; min-height: 0; }
.btn-text span { border-bottom: 1px solid currentColor; padding-bottom: 2px; transition: border-color 0.2s; }
.btn-text:hover span { border-bottom-width: 2px; }
.btn:active { transform: scale(0.98); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 244, 238, 0.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand-symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  color: var(--ink);
}
.brand-symbol svg { width: 40px; height: 40px; }
.brand-line { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand-cn { font-family: var(--font-serif); font-size: 20px; font-weight: 700; letter-spacing: 0.04em; white-space: nowrap; }
.brand-en { font-size: 12px; letter-spacing: 0.04em; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.header-actions { flex: 0 0 auto; }
.channel-bar { border-top: 1px solid rgba(220, 216, 207, 0.9); }
.channel-nav {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.channel-nav::-webkit-scrollbar { display: none; }
.channel-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 46px;
  padding: 0 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, background 0.2s ease;
}
.channel-link:hover { color: var(--primary); background: var(--primary-soft); }
.channel-link.active { color: var(--primary-deep); font-weight: 600; border-bottom-color: var(--primary); }

/* Breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 34px;
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--muted);
}
.breadcrumb a { color: var(--ink-2); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .current { color: var(--accent-deep); }

/* Article Hero */
.article-hero {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.article-hero .container {
  max-width: 1080px;
}
.article-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.24;
  letter-spacing: 0.02em;
  text-wrap: balance;
  max-width: 900px;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  padding-bottom: 34px;
  color: var(--muted);
  font-size: 14px;
}

/* Article Main Layout */
.article-main {
  padding: 54px 0 80px;
}
.article-shell {
  max-width: 1240px;
  display: block;
}
.article-shell.has-toc {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 56px;
  align-items: start;
}
.article-detail { min-width: 0; max-width: 780px; }

/* Article Content */
.article-content {
  font-size: 18px;
  line-height: 2;
  color: var(--ink-2);
}
.article-content p { margin-bottom: 1.6em; }
.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  line-height: 1.42;
  color: var(--ink);
  margin: 2em 0 0.8em;
  padding-top: 0.2em;
  position: relative;
}
.article-content h3 {
  font-size: 1.28rem;
  line-height: 1.5;
  color: var(--ink);
  margin: 1.8em 0 0.7em;
}
.article-content img {
  width: 100%;
  max-height: 460px;
  object-fit: cover;
  border-radius: var(--radius-card);
  margin: 1.8em 0;
}
.article-content blockquote {
  margin: 1.8em 0;
  padding: 4px 0 4px 22px;
  border-left: 4px solid var(--accent);
  background: var(--paper);
  border-radius: 0 6px 6px 0;
  color: var(--ink-2);
}
.article-content blockquote p { margin-bottom: 0; }
.article-content ul,
.article-content ol {
  margin: 0 0 1.6em;
  padding-left: 1.6em;
}
.article-content li { margin-bottom: 0.55em; }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 4px; }

/* Article Bottom */
.article-bottom {
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.article-keywords {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}
.article-keywords span.key-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.chip {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 13px;
  color: var(--ink-2);
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.article-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
}

/* TOC panel */
.toc-panel {
  position: sticky;
  top: 146px;
  min-width: 0;
  padding: 24px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
}
.toc-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.08em;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toc-title::before {
  content: "";
  width: 4px;
  height: 16px;
  background: var(--accent);
  border-radius: 2px;
}
.toc-list { list-style: none; }
.toc-list li { margin: 0; border-bottom: 1px dashed var(--line); }
.toc-list a {
  display: flex;
  padding: 11px 2px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-2);
  transition: color 0.15s, padding-left 0.15s;
}
.toc-list a:hover { color: var(--primary); padding-left: 5px; }
.toc-list .toc-h3 a { padding-left: 20px; font-size: 13px; }
.toc-list .toc-h3 a:hover { padding-left: 25px; }

/* Empty state */
[data-empty] { display: flex; }
.empty-box {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 320px;
  padding: 64px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-panel);
  background: var(--surface);
  color: var(--muted);
}
.empty-box svg { margin-bottom: 20px; color: var(--muted); }
.empty-box .empty-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--ink);
  margin-bottom: 6px;
}
.empty-box p { font-size: 15px; }
.empty-box .btn { margin-top: 20px; }

/* Section anchor */
.section-anchor { scroll-margin-top: 120px; }

/* Related Topics */
.related-area {
  padding: 0 0 20px;
}
.section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}
.section-head .index {
  font-family: var(--font-serif);
  font-size: 28px;
  color: var(--accent);
  line-height: 1;
}
.section-head h2 {
  display: flex;
  flex-direction: column;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  line-height: 1.3;
}
.section-head .section-sub {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.1em;
  font-weight: 500;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}
.related-card {
  grid-column: span 4;
}
.related-card .card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.related-card .card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.related-card .card-img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
  width: 100%;
}
.related-card .card-body { padding: 24px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.related-card .card-meta { display: flex; justify-content: space-between; gap: 10px; font-size: 13px; color: var(--muted); }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 3px 10px;
  font-size: 13px;
  border-radius: 4px;
  border: 1px solid rgba(14, 91, 76, 0.25);
  color: var(--primary-deep);
  background: var(--primary-soft);
}
.related-card h3 { font-size: 18px; line-height: 1.5; font-weight: 600; }
.related-card .card-link { margin-top: auto; color: var(--primary); font-size: 15px; font-weight: 500; }
.related-card .card-link:hover { color: var(--accent-deep); }
.related-card .card-link span { border-bottom: 1px solid currentColor; padding-bottom: 2px; }

/* CTA */
.cta-block {
  margin-top: 66px;
  border-radius: var(--radius-panel);
  background: var(--dark);
  background-image: linear-gradient(105deg, rgba(17, 23, 20, 0.96) 0%, rgba(17, 23, 20, 0.78) 60%, rgba(181, 122, 58, 0.2) 100%), url("/assets/images/backpic/back-3.png");
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 72px 56px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  color: #fff;
}
.cta-block h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.35;
  max-width: 620px;
}
.cta-block p { color: rgba(255, 255, 255, 0.72); max-width: 520px; margin: 14px 0 0; line-height: 1.8; }
.cta-block .btn-primary {
  background: var(--accent);
  color: #1A140B;
  border: 0;
  flex: 0 0 auto;
}
.cta-block .btn-primary:hover { background: #C98B48; }

/* Footer */
.site-footer {
  margin-top: 64px;
  background: var(--dark-soft);
  color: rgba(255, 255, 255, 0.9);
  padding: 64px 0 26px;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.3fr;
  gap: 44px;
  padding-bottom: 42px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.footer-brand { display: flex; flex-direction: column; gap: 8px; }
.footer-brand .brand-cn {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
}
.footer-brand .brand-en { font-size: 12px; letter-spacing: 0.08em; color: rgba(255, 255, 255, 0.5); text-transform: uppercase; }
.footer-brand p { margin: 14px 0 0; color: rgba(255, 255, 255, 0.55); max-width: 300px; font-size: 15px; line-height: 1.8; }
.footer-col h4 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 11px; }
.footer-col a, .footer-col span { color: rgba(255, 255, 255, 0.65); font-size: 14px; transition: color 0.2s; }
.footer-col a:hover { color: #fff; }
.footer-note { font-size: 14px; line-height: 1.9; color: rgba(255, 255, 255, 0.55); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 22px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 13px;
}
.footer-bottom .domain { color: rgba(255, 255, 255, 0.5); }
.footer-bottom .domain:hover { color: #fff; }

/* Responsive */
@media (max-width: 1023px) {
  .related-card { grid-column: span 6; }
  .footer-main { grid-template-columns: 2fr 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
  .article-shell.has-toc { grid-template-columns: minmax(0, 1fr); }
  .toc-panel { display: none !important; }
}
@media (max-width: 768px) {
  .header-main { min-height: 56px; }
  .brand-symbol { width: 32px; height: 32px; flex-basis: 32px; }
  .brand-symbol svg { width: 32px; height: 32px; }
  .brand-cn { font-size: 17px; }
  .brand-en { font-size: 11px; }
  .header-actions .btn { min-height: 36px; padding: 0 14px; font-size: 13px; }
  .channel-link { height: 42px; padding: 0 12px; font-size: 14px; }
  .article-hero h1 { font-size: 1.9rem; }
  .article-meta { gap: 10px; font-size: 13px; }
  .article-main { padding: 36px 0 60px; }
  .article-content { font-size: 17px; line-height: 2; }
  .article-content h2 { font-size: 1.34rem; }
  .cta-block { padding: 44px 24px; flex-direction: column; align-items: flex-start; }
  .cta-block h2 { font-size: 1.5rem; }
  .related-grid { grid-template-columns: repeat(6, 1fr); }
  .related-card { grid-column: span 6; }
  .related-card .card { flex-direction: row; }
  .related-card .card-img { width: 42%; aspect-ratio: 4 / 3; }
  .related-card .card-body { width: 58%; padding: 18px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: span 2; }
  .article-keywords { align-items: flex-start; }
  .card-meta { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .brand-en { display: none; }
  .related-card .card { flex-direction: column; }
  .related-card .card-img { width: 100%; }
  .related-card .card-body { width: 100%; }
  .footer-main { grid-template-columns: 1fr; }
  .article-bottom .article-actions { flex-direction: column; align-items: flex-start; }
  .cta-block { padding: 38px 20px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after { animation-duration: 0.001s !important; transition-duration: 0.001s !important; }
  .anim-enabled .reveal { opacity: 1; transform: none; }
}

/* roulang page: category1 */
:root {
  --paper: #F7F4EE;
  --surface: #FFFFFF;
  --surface-dim: #EEE9E0;
  --ink: #181B18;
  --ink-2: #3F4440;
  --muted: #8A8D85;
  --line: #DCD8CF;
  --line-strong: #B9B2A4;
  --primary: #0E5B4C;
  --primary-deep: #094238;
  --primary-soft: rgba(14, 91, 76, 0.1);
  --accent: #B57A3A;
  --accent-deep: #8C5A26;
  --dark: #111714;
  --dark-soft: #1C2521;
  --focus: #2E8B74;
  --paper-glass: rgba(247, 244, 238, 0.86);
  --glass-blur: blur(16px);
  --overlay-dark: rgba(17, 23, 20, 0.72);
  --overlay-mid: rgba(17, 23, 20, 0.48);
  --shadow-card: 0 12px 30px rgba(20, 24, 20, 0.08);
  --shadow-lift: 0 16px 30px rgba(20, 24, 20, 0.12);
  --radius-btn: 4px;
  --radius-card: 6px;
  --radius-panel: 8px;
  --container: 1240px;
  --space-section: clamp(72px, 10vw, 128px);
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "sans-serif";
  --font-head: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "STSong", "SimSun", "serif";
  --font-num: "SFMono-Regular", "Consolas", "Liberation Mono", "Menlo", monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; border: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0; }
button { font-family: inherit; border: 0; background: none; cursor: pointer; }
input, textarea {
  font-family: inherit;
  color: inherit;
  font-size: 15px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-btn);
  padding: 0 14px;
  min-height: 48px;
  width: 100%;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
textarea { padding: 12px 14px; resize: vertical; }
input:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--focus);
}
input::placeholder, textarea::placeholder { color: var(--muted); }
h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-head);
  text-wrap: balance;
  line-height: 1.22;
}
p { text-wrap: pretty; }
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}
.container-wide { max-width: 1400px; }
.main-content { min-height: 70vh; }
section, article { scroll-margin-top: 128px; }

.skip-link {
  position: fixed;
  top: -40px;
  left: 12px;
  z-index: 99;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 14px;
  border-radius: 4px;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }

/* Reveal animation, only applied when JS is active */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s cubic-bezier(.22,.61,.36,1), transform 0.6s cubic-bezier(.22,.61,.36,1);
}
.js .reveal.is-shown { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001s !important; transition-duration: 0.001s !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ===== Header and nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--paper-glass);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--line);
}
.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand-symbol { width: 44px; height: 44px; color: var(--ink); flex: 0 0 44px; display: inline-flex; align-items: center; }
.brand-symbol svg { width: 100%; height: 100%; display: block; }
.brand-line { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand-cn {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
  white-space: nowrap;
}
.brand-en {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.07em;
  white-space: nowrap;
}
.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; margin-left: 12px; }
.header-nav-wrap {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(238, 233, 224, 0.5);
}
.header-nav {
  display: flex;
  align-items: center;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  white-space: nowrap;
}
.header-nav::-webkit-scrollbar { height: 0; display: none; }
.header-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  flex: 0 0 auto;
}
.header-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.header-nav a.active { color: var(--primary-deep); border-bottom-color: var(--primary); background: var(--surface); }
.header-nav a:focus-visible { outline: 2px solid var(--focus); outline-offset: -2px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 44px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  background: transparent;
  border: 1px solid transparent;
  line-height: 1;
  text-align: center;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.btn:focus-visible, .btn:focus, a:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-deep); border-color: var(--primary-deep); }
.btn-outline { border-color: var(--line-strong); color: var(--ink); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary-deep); background: var(--primary-soft); }
.btn-text {
  color: var(--primary-deep);
  font-weight: 600;
  padding: 0;
  height: auto;
  display: inline-flex;
  align-items: center;
  border-bottom: 1px solid transparent;
}
.btn-text:hover { color: var(--primary); border-bottom-color: var(--primary); }
.btn-sm { height: 34px; padding: 0 16px; font-size: 13px; border-radius: var(--radius-btn); }

/* Section headings */
.section-title-area { max-width: 900px; margin-bottom: 44px; }
.section-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-bottom: 14px;
}
.section-kicker::before { content: ""; width: 26px; height: 2px; background: var(--accent); display: inline-block; }
.section-kicker .section-kicker-zh { color: var(--muted); letter-spacing: 0.08em; text-transform: none; }
.section-h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; letter-spacing: 0.01em; }
.section-lead { margin-top: 14px; color: var(--ink-2); font-size: 1rem; line-height: 1.8; max-width: 780px; }

/* ===== Mini hero ===== */
.hero-mini {
  position: relative;
  color: var(--paper);
  background: var(--dark);
  overflow: hidden;
}
.hero-mini::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(94deg, rgba(17,23,20,0.94) 0%, rgba(17,23,20,0.72) 38%, rgba(17,23,20,0.55) 100%),
    url("/assets/images/backpic/back-3.png") center / cover no-repeat;
}
.hero-mini::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -130px;
  width: 320px;
  height: 320px;
  border: 1px solid rgba(181,122,58,0.45);
  border-radius: 50%;
  pointer-events: none;
}
.hero-mini__inner { position: relative; z-index: 2; padding-top: clamp(40px, 7vw, 76px); padding-bottom: clamp(48px, 7vw, 84px); }
.hero-mini__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  gap: clamp(24px, 6vw, 72px);
  align-items: center;
}
.crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(247,244,238,0.7);
  margin-bottom: 32px;
}
.crumb a { color: inherit; }
.crumb a:hover { color: #fff; }
.crumb span { color: var(--muted); }
.hero-mini__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-left: 3px solid var(--accent);
  padding-left: 10px;
  color: rgba(247,244,238,0.82);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 18px;
}
.hero-mini h1 { font-size: clamp(2.2rem, 5vw, 4rem); line-height: 1.1; color: #F7F4EE; letter-spacing: 0.02em; font-weight: 700; }
.hero-mini__lead {
  margin-top: 22px;
  font-size: 1rem;
  line-height: 1.95;
  color: rgba(247,244,238,0.82);
  max-width: 640px;
}
.hero-mini__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 30px; }
.hero-mini__btn-second { color: rgba(247,244,238,0.92); }
.hero-visual {
  position: relative;
  margin: 20px auto 0;
  max-width: 520px;
}
.hero-visual__inner {
  border: 1px solid rgba(247,244,238,0.22);
  background: rgba(255,255,255,0.07);
  border-radius: var(--radius-panel);
  padding: 12px;
  box-shadow: var(--shadow-card);
}
.hero-visual__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 10px 12px;
  font-size: 13px;
  color: rgba(247,244,238,0.7);
}
.hero-visual__status { font-size: 12px; color: var(--accent); font-weight: 700; letter-spacing: 0.06em; }
.hero-visual__img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 6px;
  background: var(--dark-soft);
}
.hero-visual__caption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 8px 2px;
  font-size: 12px;
  color: rgba(247,244,238,0.74);
  letter-spacing: 0.02em;
}
.hero-mini__tag {
  position: absolute;
  right: -12px;
  bottom: 28px;
  background: var(--accent);
  color: var(--ink);
  font-weight: 700;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: var(--radius-btn);
  letter-spacing: 0.05em;
  box-shadow: var(--shadow-card);
}
@media (max-width: 960px) {
  .hero-mini__grid { grid-template-columns: 1fr; }
  .hero-visual { margin: 46px auto 0; }
}

/* ===== Main sections ===== */
.page-section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: var(--paper); }
.section-dim { background: var(--surface-dim); }
.section-deep { background: var(--dark); color: var(--paper); }

/* ===== Catalog cards ===== */
.catalog-section { background: var(--surface-dim); }
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(16px, 2vw, 26px);
}
.catalog-card {
  grid-column: span 3;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
}
.catalog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lift); border-color: var(--line-strong); }
.catalog-card__media { position: relative; margin: 0; aspect-ratio: 4 / 3; background: var(--surface-dim); overflow: hidden; }
.catalog-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
.catalog-card:hover .catalog-card__media img { transform: scale(1.03); }
.media-badge {
  position: absolute;
  left: 12px;
  top: 12px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  background: rgba(17, 23, 20, 0.86);
  color: #fff;
  border-radius: 6px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.catalog-card__body { padding: 20px 20px 24px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.catalog-card__body h3 { font-size: 1.15rem; color: var(--ink); letter-spacing: 0.01em; margin: 0; }
.catalog-card__body p { color: var(--ink-2); font-size: 0.92rem; line-height: 1.75; margin-top: 6px; }
.catalog-card__note { margin-top: auto; padding-top: 14px; font-size: 12px; color: var(--muted); border-top: 1px dashed var(--line); }
@media (max-width: 1100px) {
  .catalog-card { grid-column: span 6; }
}
@media (max-width: 560px) {
  .catalog-card { grid-column: span 12; }
}

/* ===== Scene rows ===== */
.scene-section { background: var(--dark); color: rgba(247,244,238,0.9); }
.scene-section .section-lead { color: rgba(247,244,238,0.64); }
.scene-list_section-title .section-h2 { color: #fff; }
.scene-list { border-top: 1px solid rgba(185,178,164,0.32); margin-top: 28px; }
.scene-row {
  display: grid;
  grid-template-columns: 96px minmax(260px, 0.9fr) minmax(0, 1.15fr) 32px;
  gap: 28px;
  align-items: baseline;
  padding: 34px 0;
  border-bottom: 1px solid rgba(185,178,164,0.25);
  transition: background 0.2s ease;
}
.scene-row:hover { background: rgba(14, 91, 76, 0.12); }
.scene-row__num { font-family: var(--font-num); font-size: 16px; color: var(--accent); font-weight: 700; letter-spacing: 0.05em; }
.scene-row__text h3 { color: #fff; font-size: clamp(1.15rem, 1.6vw, 1.45rem); font-weight: 600; margin: 0 0 10px; }
.scene-row__desc { font-size: 0.95rem; color: rgba(247,244,238,0.66); line-height: 1.85; max-width: 720px; }
.scene-row__arrow { color: var(--accent); text-align: right; }
.scene-row__arrow svg { width: 22px; height: 22px; display: inline-block; }
.scene-row__arrow a { display: inline-flex; width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: 50%; border: 1px solid rgba(181,122,58,0.45); }
.scene-row__arrow a:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
@media (max-width: 820px) {
  .scene-row { grid-template-columns: 54px 1fr; gap: 12px 16px; }
  .scene-row__arrow { grid-column: 2; justify-self: start; }
  .scene-row__arrow a { width: 32px; height: 32px; }
}
@media (max-width: 520px) {
  .scene-row { grid-template-columns: 1fr; gap: 12px; }
  .scene-row__num { color: var(--accent); }
}

/* ===== Path steps ===== */
.path-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(18px, 2vw, 28px); }
.path-item {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-panel);
  padding: clamp(22px, 2.6vw, 30px);
  position: relative;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.path-item:hover { border-color: var(--line-strong); box-shadow: var(--shadow-card); }
.path-item__index {
  font-family: var(--font-num);
  font-size: 15px;
  color: var(--accent-deep);
  font-weight: 700;
  display: block;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.path-item h3 { font-size: 1.18rem; color: var(--ink); margin-bottom: 10px; }
.path-item p { color: var(--ink-2); font-size: 0.92rem; line-height: 1.8; }
.path-item::after {
  content: "";
  position: absolute;
  left: 26px;
  top: 0;
  width: 28px;
  height: 3px;
  background: var(--primary);
}
@media (max-width: 920px) {
  .path-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .path-grid { grid-template-columns: 1fr; }
}

/* ===== FAQ ===== */
.faq-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(28px, 5vw, 80px);
  align-items: start;
}
.faq-legend { position: sticky; top: 146px; }
.faq-list { border-top: 1px solid var(--line-strong); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 6px 22px 0;
  cursor: pointer;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  transition: color 0.2s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--primary); }
.faq-question { font-family: var(--font-body); }
.faq-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
}
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--primary);
  transition: transform 0.25s ease;
}
.faq-icon::before { width: 16px; height: 2px; left: 1px; top: 8px; }
.faq-icon::after { width: 2px; height: 16px; left: 8px; top: 1px; }
.faq-item[open] .faq-icon::after { transform: scaleY(0); }
.faq-item[open] summary { color: var(--primary-deep); }
.faq-answer { padding: 0 42px 24px 0; color: var(--ink-2); line-height: 1.9; font-size: 0.96rem; }
@media (max-width: 900px) {
  .faq-layout { grid-template-columns: 1fr; }
  .faq-legend { position: static; }
}

/* ===== CTA lead form ===== */
.lead-section { background: var(--dark); color: var(--paper); }
.lead-section::before { content: ""; }
.lead-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.lead-intro h2 { color: #fff; font-size: clamp(1.7rem, 3vw, 2.3rem); margin: 14px 0 18px; }
.lead-intro p { color: rgba(247,244,238,0.72); line-height: 1.9; max-width: 560px; }
.lead-intro .section-kicker { color: var(--accent); margin-bottom: 0; }
.lead-form-panel {
  background: var(--dark-soft);
  border: 1px solid rgba(185,178,164,0.28);
  border-radius: var(--radius-panel);
  padding: clamp(22px, 3vw, 34px);
}
.form-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-fieldname { display: flex; flex-direction: column; gap: 6px; }
.form-fieldfull { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 6px; }
.form-fields label { font-size: 13px; color: rgba(247,244,238,0.78); font-weight: 600; }
.form-fields input, .form-fields textarea { background: rgba(255,255,255,0.94); border: 1px solid rgba(255,255,255,0.3); color: var(--ink); }
.form-fields input::placeholder, .form-fields textarea::placeholder { color: #8A8D85; }
.form-fields input.required:invalid:not(:placeholder-shown), .form-fields textarea.required:invalid:not(:placeholder-shown) { border-color: #A33A25; }
#intakeForm .success-tip { display: none; }
#intakeForm.is-success .form-fields, #intakeForm.is-success .form-foot { display: none; }
#intakeForm.is-success .success-tip { display: flex; }
.success-tip { align-items: flex-start; gap: 14px; color: rgba(247,244,238,0.9); }
.success-tip svg { flex: 0 0 40px; color: var(--accent); }
.form-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 20px; flex-wrap: wrap; }
.form-note { font-size: 13px; color: rgba(247,244,238,0.58); max-width: 260px; line-height: 1.6; }
.lead-actions { margin-top: 26px; }
@media (max-width: 980px) {
  .lead-grid { grid-template-columns: 1fr; }
  .faq-legend { position: static; }
}
@media (max-width: 560px) {
  .form-fields { grid-template-columns: 1fr; }
  .form-fieldfull { grid-column: auto; }
}

/* ===== Footer shared ===== */
.site-footer {
  background: var(--dark);
  color: rgba(247,244,238,0.76);
  padding-top: 64px;
  padding-bottom: 24px;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: clamp(26px, 4vw, 60px);
  padding-bottom: 56px;
}
.footer-brand { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.footer-brand .brand-cn { font-family: var(--font-head); font-size: 24px; color: #fff; }
.footer-brand .brand-en { font-size: 11px; color: rgba(247,244,238,0.5); letter-spacing: 0.06em; }
.footer-brand p { font-size: 14px; line-height: 1.9; color: rgba(247,244,238,0.62); max-width: 420px; }
.footer-col h4 { font-size: 14px; color: #fff; font-family: var(--font-body); margin-bottom: 18px; font-weight: 700; }
.footer-col ul { display: grid; gap: 12px; }
.footer-col a, .footer-col span { color: rgba(247,244,238,0.65); font-size: 14px; transition: color 0.2s ease; }
.footer-col a:hover { color: var(--accent); }
.footer-note { color: rgba(247,244,238,0.5); line-height: 1.9; font-size: 14px; }
.footer-bottom {
  border-top: 1px solid rgba(247,244,238,0.14);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(247,244,238,0.56);
}
.footer-bottom .domain { color: rgba(247,244,238,0.68); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 900px) {
  .footer-main { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .footer-main { grid-template-columns: 1fr; }
}

/* Responsive header/nav */
@media (max-width: 720px) {
  .header-main { min-height: 60px; }
  .brand-symbol { width: 38px; height: 38px; flex-basis: 38px; }
  .brand-cn { font-size: 20px; }
  .brand-en { display: none; }
  .btn-sm { height: 30px; padding: 0 12px; font-size: 12px; }
  .header-nav a { font-size: 13px; padding: 0 14px; min-height: 42px; }
  .hero-mini__actions .btn { width: 100%; }
}
@media (max-width: 560px) {
  .section-h2 { font-size: 1.68rem; }
  .hero-mini h1 { font-size: 2.2rem; }
}

/* roulang page: category2 */
:root{
  --paper:#F7F4EE;
  --surface:#FFFFFF;
  --surface-dim:#EEE9E0;
  --ink:#181B18;
  --ink-2:#3F4440;
  --muted:#8A8D85;
  --line:#DCD8CF;
  --line-strong:#B9B2A4;
  --primary:#0E5B4C;
  --primary-deep:#094238;
  --primary-soft:rgba(14,91,76,.1);
  --accent:#B57A3A;
  --accent-deep:#8C5A26;
  --dark:#111714;
  --dark-soft:#1C2521;
  --focus:#2E8B74;
  --max-w:1240px;
  --gutter:clamp(20px,4vw,40px);
  --radius-card:6px;
  --radius-panel:8px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Songti SC","Noto Serif CJK SC","Source Han Serif SC",STSong,SimSun,serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.page-category2{
  --section-kicker:"SCENARIO";
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{padding:0;margin:0;list-style:none}
h1,h2,h3,h4{margin:0;text-wrap:balance}
p{margin:0}
.container{
  max-width:var(--max-w);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:46px;
  padding:0 24px;
  border-radius:4px;
  border:1px solid transparent;
  font-family:var(--sans);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:background-color .2s,color .2s,border-color .2s,transform .2s;
  white-space:nowrap;
  background:transparent;
}
.btn:active{transform:scale(.98)}
.btn:focus-visible,.brand:focus-visible,a:focus-visible,summary:focus-visible{
  outline:2px solid var(--focus);
  outline-offset:2px;
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-deep);color:#fff}
.btn-outline{border-color:var(--line-strong);color:var(--ink);background:transparent}
.btn-outline:hover{border-color:var(--primary);background:var(--primary-soft)}
.btn-text{
  padding:0 4px;
  background:transparent;
  color:var(--primary);
  border-radius:0;
  position:relative;
}
.btn-text::after{
  content:"";
  position:absolute;
  left:0;bottom:2px;
  width:100%;
  height:1px;
  background:var(--primary);
  transform:scaleX(.25);
  transform-origin:left center;
  transition:transform .25s var(--ease);
}
.btn-text:hover::after{transform:scaleX(1)}
/* 全局头部 */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(247,244,238,.86);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-main{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:76px;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  border-radius:6px;
}
.brand-symbol{
  color:var(--ink);
  display:inline-flex;
  width:44px;
  height:44px;
  flex:none;
}
.brand-symbol svg{width:100%;height:100%}
.brand-line{
  display:flex;
  flex-direction:column;
  gap:2px;
  line-height:1.2;
}
.brand-cn{
  font-family:var(--serif);
  font-size:20px;
  font-weight:700;
  letter-spacing:.06em;
}
.brand-en{
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
  text-transform:uppercase;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
}
.channel-nav{
  border-top:1px solid var(--line);
  background:rgba(247,244,238,.62);
}
.channel-list{
  display:flex;
  gap:6px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.channel-list::-webkit-scrollbar{display:none}
.channel-list a{
  flex:none;
  padding:12px 16px 10px;
  color:var(--ink-2);
  border-bottom:2px solid transparent;
  font-size:15px;
  font-weight:500;
  transition:background-color .2s,color .2s,border-color .2s;
}
.channel-list a:hover{color:var(--ink);background:var(--primary-soft)}
.channel-list a.active{
  color:var(--ink);
  font-weight:700;
  border-bottom-color:var(--primary);
}
/* 通用板块 */
.section{padding:clamp(72px,10vw,128px) 0;position:relative}
.section-head{
  display:flex;
  align-items:flex-end;
  gap:24px;
  margin-bottom:48px;
}
.section-label{
  flex:none;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--primary);
  text-transform:uppercase;
}
.section-label::before{
  content:"";
  width:24px;
  height:1px;
  background:var(--primary);
}
.section-title{
  font-family:var(--serif);
  font-size:clamp(1.7rem,3vw,2.3rem);
  line-height:1.3;
  font-weight:700;
}
.section-title .light{color:#fff}
.section-desc{
  max-width:620px;
  margin-top:18px;
  color:var(--ink-2);
  font-size:16px;
  line-height:1.9;
}
/* Hero 分类小横幅 */
.category-hero{
  padding:clamp(44px,7vw,86px) 0 clamp(36px,6vw,64px);
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(circle at 96% 8%,rgba(181,122,58,.08),transparent 280px),
    var(--paper);
}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);
  gap:60px;
  align-items:end;
}
.category-hero .serial{
  display:flex;
  align-items:center;
  gap:14px;
  color:var(--accent-deep);
  font-size:13px;
  font-weight:600;
  letter-spacing:.18em;
  margin-bottom:18px;
}
.category-hero .serial::after{
  content:"";
  width:64px;
  height:1px;
  background:var(--line-strong);
}
.category-hero h1{
  font-family:var(--serif);
  font-size:clamp(2.2rem,5vw,3.9rem);
  line-height:1.12;
  font-weight:700;
  color:var(--ink);
  letter-spacing:.01em;
}
.category-hero .lead{
  margin-top:24px;
  font-size:17px;
  line-height:2;
  color:var(--ink-2);
  max-width:600px;
}
.hero-meta{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--radius-card);
  padding:22px;
}
.hero-meta .item{
  padding:10px 4px;
  border-top:2px solid var(--primary);
}
.hero-meta .meta-label{
  font-size:13px;
  color:var(--muted);
}
.hero-meta .meta-value{
  margin-top:6px;
  font-family:var(--serif);
  font-size:24px;
  font-weight:700;
  color:var(--ink);
}
/* 索引细线列表 */
.index-section{background:var(--surface)}
.section-top-line{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  border-bottom:1px solid var(--ink);
  padding-bottom:28px;
  margin-bottom:8px;
  gap:40px;
}
.section-top-line .section-label{margin-bottom:14px}
.index-list{border-top:1px solid var(--ink)}
.index-row{
  display:grid;
  grid-template-columns:80px 1fr 140px;
  gap:24px;
  align-items:center;
  padding:32px 10px;
  border-bottom:1px solid var(--line);
  transition:background-color .2s ease,padding-left .2s ease;
}
.index-row:hover{
  background:rgba(14,91,76,.05);
  padding-left:22px;
}
.index-num{
  font-family:var(--serif);
  font-size:30px;
  font-weight:700;
  color:var(--accent-deep);
  line-height:1;
  font-variant-numeric:tabular-nums;
}
.index-title{
  font-size:19px;
  font-weight:700;
  letter-spacing:.02em;
  margin-bottom:6px;
}
.index-desc{
  color:var(--ink-2);
  font-size:15px;
  line-height:1.8;
  max-width:800px;
}
.index-go{
  text-align:right;
}
.index-go .btn-text{
  color:var(--accent-deep);
  font-weight:600;
  font-size:14px;
}
/* 授权模式区 */
.model-section{background:var(--surface-dim);overflow:hidden}
.model-layout{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:48px;
  align-items:stretch;
}
.model-figure{
  position:relative;
  border-radius:var(--radius-panel);
  overflow:hidden;
  min-height:360px;
  background:#e2ddd4;
}
.model-figure img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.model-figure figcaption{
  position:absolute;
  left:16px;bottom:16px;
  right:16px;
  color:white;
  background:rgba(17,23,20,.74);
  border-radius:4px;
  padding:12px 16px;
  font-size:14px;
  line-height:1.6;
  border-left:2px solid var(--accent);
}
.model-panel{
  display:flex;
  flex-direction:column;
  gap:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
}
.model-block{
  padding:28px 30px;
  position:relative;
}
.model-block + .model-block{border-top:1px solid var(--line)}
.model-block.no{
  border-left:3px solid var(--primary);
}
.model-block.temp{
  border-left:3px solid var(--accent);
}
.model-tag{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--accent-deep);
  border:1px solid var(--line-strong);
  padding:3px 10px;
  border-radius:4px;
  background:var(--paper);
  margin-bottom:14px;
}
.model-block h3{
  font-family:var(--serif);
  font-size:23px;
  margin-bottom:10px;
}
.model-block p{
  color:var(--ink-2);
  font-size:15px;
  line-height:1.85;
  margin-bottom:16px;
}
.model-points{
  display:flex;
  flex-wrap:wrap;
  gap:6px 8px;
}
.model-points li{
  font-size:12px;
  color:var(--ink-2);
  background:var(--paper);
  border:1px solid var(--line);
  padding:3px 9px;
  border-radius:3px;
}
/* 生命周期深色流程 */
.flow-section{
  background:var(--dark);
  color:rgba(255,255,255,.92);
}
.flow-header{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:30px;
  align-items:end;
  margin-bottom:52px;
}
.flow-header .section-label{
  color:#9FCBBE;
}
.flow-header .section-label::before{background:#9FCBBE}
.flow-header h2{
  color:white;
  font-size:clamp(1.7rem,3vw,2.2rem);
}
.flow-header p{
  color:rgba(255,255,255,.68);
  font-size:15px;
  line-height:1.9;
  border-left:1px solid var(--line-strong);
  padding-left:20px;
}
.flow-steps{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:20px;
  counter-reset:flow 0;
}
.flow-step{
  border-top:1px solid rgba(255,255,255,.24);
  padding-top:24px;
  position:relative;
}
.flow-step::before{
  content:"";
  position:absolute;
  top:-4px;left:0;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--accent);
}
.flow-code{
  margin-bottom:12px;
  font-size:42px;
  font-family:var(--serif);
  line-height:1;
  color:rgba(181,122,58,.86);
  font-weight:700;
}
.flow-step h3{
  font-size:18px;
  color:#fff;
  margin-bottom:10px;
}
.flow-step p{
  color:rgba(255,255,255,.6);
  font-size:14px;
  line-height:1.8;
}
/* 四项结果 */
.key-section{background:var(--paper)}
.key-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0;
  border-top:1px solid var(--ink);
}
.key-row{
  padding:32px 30px 32px 0;
  border-bottom:1px solid var(--line);
  display:grid;
  grid-template-columns:70px 1fr;
  gap:20px;
  align-items:start;
}
.key-row:nth-child(odd){
  padding-right:48px;
}
.key-row:nth-child(even){
  padding-left:48px;
  border-left:1px solid var(--line);
}
.key-count{
  font-family:var(--serif);
  font-size:22px;
  color:var(--primary);
  border-top:2px solid var(--primary);
  padding-top:10px;
}
.key-main h3{
  font-size:18px;
  margin-bottom:6px;
}
.key-main p{
  color:var(--ink-2);
  font-size:14px;
  line-height:1.8;
}
/* FAQ */
.faq-section{background:var(--surface)}
.faq-layout{
  display:grid;
  grid-template-columns:minmax(0,.8fr) minmax(0,1.4fr);
  gap:64px;
}
.faq-list{
  border-top:1px solid var(--ink);
}
.faq-item{
  border-bottom:1px solid var(--line);
  transition:border-color .2s;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item summary{
  cursor:pointer;
  list-style:none;
  padding:24px 44px 24px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  font-size:17px;
  font-weight:600;
  position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";
  position:absolute;
  right:4px;
  width:18px;
  height:18px;
  border-right:2px solid var(--primary);
  border-bottom:2px solid var(--primary);
  transform:rotate(45deg);
  transition:transform .25s var(--ease),border-color .2s;
}
.faq-item[open] summary::after{
  transform:rotate(225deg);
  border-color:var(--accent-deep);
}
.faq-body{
  padding:0 42px 26px 0;
  color:var(--ink-2);
  font-size:15px;
  line-height:1.85;
}
.faq-aside{
  border-left:1px solid var(--line-strong);
  padding-left:32px;
}
.faq-aside .mini-title{
  font-family:var(--serif);
  font-size:22px;
  font-weight:700;
  margin:18px 0 14px;
}
.faq-aside p{
  color:var(--ink-2);
  font-size:15px;
  line-height:1.9;
  margin-bottom:20px;
}
/* CTA */
.consult-section{
  background:
    linear-gradient(90deg,rgba(17,23,20,.88),rgba(17,23,20,.58)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat,
    var(--dark);
  color:white;
  position:relative;
}
.consult-content{
  display:grid;
  grid-template-columns:1.25fr .75fr;
  gap:48px;
  align-items:center;
}
.consult-content h2{
  color:#fff;
  font-family:var(--serif);
  font-size:clamp(1.9rem,3.8vw,2.9rem);
  line-height:1.25;
}
.consult-content .lead{
  margin-top:16px;
  color:rgba(255,255,255,.78);
  font-size:16px;
  line-height:1.9;
}
.consult-cta{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}
.consult-cta .btn-primary{background:var(--accent);border-color:var(--accent)}
.consult-cta .btn-primary:hover{background:var(--accent-deep);border-color:var(--accent-deep)}
.consult-cta .btn-outline{
  border-color:rgba(255,255,255,.56);
  color:white;
}
.consult-cta .btn-outline:hover{
  border-color:#fff;
  background:rgba(255,255,255,.12);
}
/* 页脚 */
.site-footer{
  background:var(--dark-soft);
  color:rgba(255,255,255,.78);
  border-top:1px solid rgba(255,255,255,.06);
}
.footer-main{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1fr);
  gap:48px;
  padding-top:72px;
  padding-bottom:54px;
}
.footer-brand .brand-cn{
  font-family:var(--serif);
  font-size:24px;
  color:#fff;
  letter-spacing:.06em;
}
.footer-brand .brand-en{
  display:block;
  margin-top:6px;
  color:rgba(255,255,255,.46);
  font-size:11px;
  letter-spacing:.14em;
}
.footer-brand p{
  margin-top:22px;
  font-size:14px;
  line-height:1.9;
  color:rgba(255,255,255,.6);
  max-width:300px;
}
.footer-col h4{
  font-size:15px;
  color:#fff;
  font-weight:600;
  margin-bottom:20px;
}
.footer-col li{margin-bottom:10px}
.footer-col a,.footer-note span{
  color:rgba(255,255,255,.66);
  font-size:14px;
  transition:color .2s;
}
.footer-col a:hover{color:#fff}
.footer-note{
  font-size:14px;
  line-height:1.9;
  color:rgba(255,255,255,.5);
}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.08);
  padding-top:24px;
  padding-bottom:28px;
  color:rgba(255,255,255,.42);
  font-size:13px;
}
.footer-bottom .domain{
  color:var(--accent);
}
@media (max-width:1024px){
  .hero-grid{align-items:start;gap:36px}
  .model-layout{grid-template-columns:1fr;gap:28px}
  .model-figure{min-height:280px}
  .flow-steps{grid-template-columns:repeat(3,1fr);gap:22px 14px}
  .flow-step:nth-child(n+4){margin-top:8px}
  .footer-main{grid-template-columns:1fr 1fr;gap:36px}
  .faq-layout{grid-template-columns:1fr;gap:36px}
  .faq-aside{border-left:0;padding-left:0}
  .consult-content{grid-template-columns:1fr;gap:24px}
}
@media (max-width:768px){
  .header-main{min-height:56px;gap:12px}
  .brand-symbol{width:36px;height:36px}
  .brand-en{display:none}
  .brand-cn{font-size:17px}
  .btn-sm{padding:0 14px;font-size:13px}
  .channel-list a{padding:11px 12px 9px;font-size:14px}
  .section-top-line{flex-direction:column;gap:16px;align-items:flex-start}
  .section{padding:64px 0}
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero-meta{grid-template-columns:1fr 1fr}
  .index-row{grid-template-columns:56px 1fr;gap:14px;padding:24px 4px}
  .index-num{font-size:24px}
  .index-go{grid-column:2;text-align:left;padding-top:6px}
  .model-block{padding:22px}
  .flow-steps{grid-template-columns:1fr;margin-top:10px}
  .flow-step{border-left:1px solid rgba(255,255,255,.18);border-top:0;padding-left:22px;padding-top:6px;margin-left:3px}
  .flow-step::before{top:2px;left:-3px}
  .flow-code{font-size:30px}
  .key-grid{grid-template-columns:1fr}
  .key-row:nth-child(odd),.key-row:nth-child(even){padding:24px 0;border-left:0;border-bottom:1px solid var(--line)}
  .faq-item summary{padding:20px 32px 20px 0}
  .faq-body{padding-right:8px}
  .footer-main{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .hero-meta{grid-template-columns:1fr}
  .key-row{grid-template-columns:40px 1fr;gap:14px}
  .consult-cta .btn{width:100%}
  .consult-cta .btn-outline{margin-left:0}
  .index-desc{font-size:14px}
  .category-hero h1{font-size:2.1rem}
  .section-label{letter-spacing:.06em}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
}
html.js-anim .reveal{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
html.js-anim .reveal.in{
  opacity:1;
  transform:none;
}
@media (prefers-reduced-motion:reduce){
  html.js-anim .reveal{
    opacity:1;
    transform:none;
  }
}

/* roulang page: category3 */
:root {
  --paper: #F7F4EE;
  --surface: #FFFFFF;
  --surface-dim: #EEE9E0;
  --ink: #181B18;
  --ink-2: #3F4440;
  --muted: #8A8D85;
  --line: #DCD8CF;
  --line-strong: #B9B2A4;
  --primary: #0E5B4C;
  --primary-deep: #094238;
  --primary-soft: rgba(14, 91, 76, 0.1);
  --accent: #B57A3A;
  --accent-deep: #8C5A26;
  --dark: #111714;
  --dark-soft: #1C2521;
  --focus: #2E8B74;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-soft: 0 16px 40px rgba(20,24,20,.1);
  --transition: all .25s cubic-bezier(.22,.61,.36,1);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
body::-webkit-scrollbar {
  width: 10px;
}
body::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 20px;
}
body.page-category {
  background: var(--paper);
}
h1, h2, h3, h4 {
  font-family: "Songti SC","Noto Serif CJK SC","Source Han Serif SC",STSong,SimSun,serif;
  color: var(--ink);
  text-wrap: balance;
}
p {
  margin: 0 0 1.5em;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  display: block;
  max-width: 100%;
}
button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}
.button-reset {
  border: 0;
  background: none;
  padding: 0;
  cursor: pointer;
}
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding-left: clamp(20px,4vw,40px);
  padding-right: clamp(20px,4vw,40px);
}
.skip-link {
  position: absolute;
  left: 16px;
  top: -100px;
  background: var(--primary-deep);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top .2s ease;
}
.skip-link:focus {
  top: 12px;
  color: #fff;
  outline: 2px solid #fff;
}
::selection {
  background: var(--primary-soft);
  color: var(--primary-deep);
}
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  vertical-align: middle;
  white-space: nowrap;
}
.btn:active {
  transform: scale(.98);
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-deep);
  color: #fff;
  box-shadow: 0 8px 22px rgba(14,91,76,.2);
}
.btn-outline {
  border-color: var(--line-strong);
  color: var(--ink);
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary-deep);
}
.btn-sm {
  height: 38px;
  padding: 0 18px;
  font-size: 14px;
}
.btn-dark {
  background: #fff;
  color: var(--dark);
}
.btn-dark:hover {
  background: var(--surface-dim);
  color: var(--dark);
}
.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: auto;
  padding: 0 0 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  border-radius: 0;
  border-bottom: 1px solid transparent;
}
.btn-text::after {
  content: "→";
  transition: transform .2s ease;
}
.btn-text:hover {
  border-bottom-color: var(--primary);
}
.btn-text:hover::after {
  transform: translateX(4px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: rgba(247,244,238,.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 74px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.brand-symbol {
  width: 46px;
  height: 46px;
  color: var(--primary);
}
.brand-line {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.2;
}
.brand-cn {
  font-family: "Songti SC","Noto Serif CJK SC","Source Han Serif SC",STSong,SimSun,serif;
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .06em;
}
.brand-en {
  font-size: 10px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: .13em;
  white-space: nowrap;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.channel-strip {
  border-top: 1px solid var(--line);
  background: rgba(238,233,224,.6);
}
.channel-inner {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 4px;
}
.channel-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.channel-nav::-webkit-scrollbar {
  display: none;
}
.channel-nav a {
  display: block;
  padding: 12px 18px 11px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  border-bottom: 2px solid transparent;
  border-radius: 0;
  white-space: nowrap;
  transition: var(--transition);
}
.channel-nav a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
.channel-nav a.active {
  color: var(--primary-deep);
  background: var(--primary-soft);
  border-bottom-color: var(--accent);
  font-weight: 700;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--accent-deep);
  text-transform: uppercase;
  padding-bottom: 12px;
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}
.eyebrow-on-dark {
  color: #d9a968;
}
.eyebrow-on-dark::before {
  background: #d9a968;
}

.security-hero {
  position: relative;
  background: var(--dark);
  color: #fff;
  overflow: hidden;
  padding: clamp(88px,10vw,136px) 0 clamp(64px,7vw,96px);
}
.security-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(100deg,rgba(17,23,20,.95) 8%,rgba(17,23,20,.78) 64%,rgba(17,23,20,.62)),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  opacity: .72;
  z-index: 1;
}
.security-hero::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  right: -120px;
  bottom: -120px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 50%;
  z-index: 2;
}
.hero-inner {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: minmax(0,1.5fr) minmax(320px,.8fr);
  gap: clamp(36px,6vw,88px);
  align-items: center;
}
.security-hero h1 {
  color: #fff;
  font-size: clamp(2.4rem,5vw,4rem);
  line-height: 1.12;
  margin: 0 0 22px;
  letter-spacing: .04em;
}
.hero-lead {
  font-size: 17px;
  line-height: 2;
  color: rgba(255,255,255,.9);
  max-width: 720px;
  margin-bottom: 22px;
}
.hero-desc {
  font-size: 14px;
  line-height: 1.9;
  color: rgba(255,255,255,.66);
  max-width: 620px;
  margin-bottom: 34px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}
.hero-actions .btn-link-light {
  color: #fff;
}
.hero-panel {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.hero-panel-title {
  font-size: 14px;
  color: rgba(255,255,255,.72);
  letter-spacing: .06em;
  margin-bottom: 18px;
}
.hero-panel-title strong {
  color: #fff;
}
.guard-ring {
  width: 148px;
  height: 148px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.3);
  border-top-color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 12px 0 20px;
  padding: 16px;
  animation: ringPulse 4s infinite ease;
}
.guard-ring span {
  font-family: inherit;
  font-size: 13px;
  color: rgba(255,255,255,.92);
  line-height: 1.6;
  letter-spacing: .08em;
}
@keyframes ringPulse {
  0%,100% { transform: rotate(0deg); }
  50% { transform: rotate(4deg); }
}
.guard-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.guard-points li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: rgba(255,255,255,.86);
  border-bottom: 1px dashed rgba(255,255,255,.12);
  padding-bottom: 8px;
}
.guard-points li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.section-block {
  padding-top: clamp(72px,10vw,128px);
  padding-bottom: clamp(72px,10vw,128px);
}
.security-feature-section {
  background: var(--paper);
}
.section-head {
  max-width: 840px;
  margin-bottom: clamp(48px,6vw,72px);
}
.section-head .eyebrow {
  margin-bottom: 6px;
}
.section-head h2 {
  font-size: clamp(1.7rem,3vw,2.2rem);
  line-height: 1.3;
  margin: 8px 0 12px;
}
.section-head p {
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.8;
  margin: 0;
}
.feature-list {
  display: flex;
  flex-direction: column;
}
.feature-item {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(28px,5vw,84px);
  align-items: center;
  border-top: 1px solid var(--line);
  padding: clamp(48px,6vw,76px) 0;
}
.feature-item:last-child {
  border-bottom: 1px solid var(--line);
}
.feature-item--flip .feature-body {
  order: 1;
}
.feature-item--flip .feature-media {
  order: 2;
}
.feature-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--surface);
}
.feature-media::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -18px;
  width: 76px;
  height: 76px;
  border-right: 1px solid var(--accent);
  border-bottom: 1px solid var(--accent);
  opacity: .7;
  pointer-events: none;
}
.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  transition: transform .8s cubic-bezier(.22,.61,.36,1);
}
.feature-item:hover .feature-media img {
  transform: scale(1.025);
}
.feature-index {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: "Songti SC","Noto Serif CJK SC",STSong,SimSun,serif;
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--accent-deep);
  margin-bottom: 12px;
}
.feature-index::before {
  content: "";
  flex: 0 0 36px;
  height: 1px;
  background: var(--accent);
}
.feature-body h2 {
  font-size: clamp(1.45rem,2.2vw,1.9rem);
  line-height: 1.35;
  margin: 0 0 18px;
  color: var(--ink);
}
.feature-body p {
  color: var(--ink-2);
  line-height: 2;
  font-size: 16px;
  margin-bottom: 18px;
}
.secure-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}
.secure-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  color: var(--ink-2);
  line-height: 1.9;
  font-size: 15px;
}
.secure-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--primary);
  border-radius: 50%;
  background: var(--primary-soft);
}

.dark-thread {
  background: var(--dark);
  color: #fff;
  position: relative;
}
.dark-thread::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  opacity: .1;
  pointer-events: none;
}
.thread-inner {
  position: relative;
}
.thread-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.thread-head .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: 0;
}
.thread-head h2 {
  color: #fff;
  font-size: clamp(1.8rem,3vw,2.3rem);
  margin: 0;
  line-height: 1.35;
}
.thread-head p {
  color: rgba(255,255,255,.76);
  font-size: 16px;
  line-height: 1.9;
  margin: 0;
  align-self: end;
}
.thread-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}
.thread-node {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.12);
  padding: 28px 26px;
  border-radius: var(--radius-md);
  min-height: 210px;
  transition: all .3s ease;
}
.thread-node:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.3);
  transform: translateY(-4px);
}
.thread-node .node-no {
  font-size: 44px;
  font-weight: 300;
  line-height: .9;
  color: rgba(255,255,255,.34);
  margin-bottom: 24px;
}
.thread-node h3 {
  color: #fff;
  font-size: 18px;
  margin: 0 0 11px;
  letter-spacing: .03em;
}
.thread-node p {
  font-size: 14px;
  color: rgba(255,255,255,.63);
  line-height: 1.8;
  margin-bottom: 0;
}

.qa-section {
  background: var(--surface);
}
.qa-wrap {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(36px,7vw,104px);
  align-items: start;
}
.qa-intro h2 {
  margin: 20px 0 18px;
  font-size: clamp(1.6rem,2.6vw,2.1rem);
  line-height: 1.3;
}
.qa-intro p {
  color: var(--ink-2);
}
.qa-list {
  border-top: 1px solid var(--line-strong);
}
.qa-item {
  border-bottom: 1px solid var(--line);
}
.qa-item summary {
  list-style: none;
}
.qa-item summary::-webkit-details-marker {
  display: none;
}
.qa-item-button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 4px;
  text-align: left;
  border: 0;
  background: transparent;
  cursor: pointer;
  color: var(--ink);
  font-weight: 700;
  font-size: 17px;
  transition: var(--transition);
}
.qa-item-button:hover {
  color: var(--primary);
}
.qa-item-button .qa-icon {
  position: relative;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: var(--transition);
}
.qa-item-button .qa-icon::before,
.qa-item-button .qa-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 1px;
  background: var(--ink-2);
  transform: translate(-50%,-50%);
  transition: var(--transition);
}
.qa-item-button .qa-icon::after {
  transform: translate(-50%,-50%) rotate(90deg);
}
.qa-item.open .qa-icon {
  border-color: var(--primary);
}
.qa-item.open .qa-icon::before,
.qa-item.open .qa-icon::after {
  background: var(--primary);
}
.qa-item.open .qa-icon::after {
  transform: translate(-50%,-50%) rotate(0deg);
}
.qa-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .4s cubic-bezier(.22,.61,.36,1);
}
.qa-item.open .qa-answer {
  grid-template-rows: 1fr;
}
.qa-answer-inner {
  overflow: hidden;
}
.qa-answer p {
  padding: 0 24px 24px 4px;
  color: var(--ink-2);
  line-height: 2;
  font-size: 15px;
  margin: 0;
}

.contact-panel {
  background: var(--dark-soft);
  color: #fff;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 40px;
  align-items: center;
}
.contact-copy h2 {
  color: #fff;
  font-size: clamp(1.8rem,3vw,2.4rem);
  line-height: 1.3;
  margin: 14px 0 18px;
}
.contact-copy p {
  color: rgba(255,255,255,.72);
  margin-bottom: 22px;
  line-height: 1.9;
}
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.contact-form-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-soft);
}
.contact-form-card h3 {
  color: var(--ink);
  margin: 0 0 8px;
  font-size: 22px;
}
.contact-form-card > p {
  color: var(--ink-2);
  font-size: 14px;
  margin-bottom: 20px;
}
.lead-form .form-group {
  margin-bottom: 14px;
}
.lead-form label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 5px;
}
.lead-form .input-field {
  width: 100%;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper);
  padding: 0 14px;
  transition: var(--transition);
  line-height: normal;
}
.lead-form textarea.input-field {
  height: 88px;
  padding: 10px 14px;
  resize: vertical;
}
.lead-form .input-field::placeholder {
  color: var(--muted);
}
.lead-form .input-field:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px var(--primary-soft);
}
.lead-form button {
  width: 100%;
  margin-top: 8px;
}
.form-note {
  font-size: 12px;
  color: var(--muted);
  margin: 12px 0 0;
  text-align: center;
}

.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,.78);
  padding-top: 72px;
}
.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .brand-cn {
  display: block;
  color: #fff;
  font-size: 24px;
  margin-bottom: 2px;
}
.footer-brand .brand-en {
  color: rgba(255,255,255,.5);
  font-size: 12px;
  display: block;
  letter-spacing: .1em;
  margin-bottom: 18px;
}
.footer-brand p {
  color: rgba(255,255,255,.58);
  font-size: 14px;
  line-height: 1.8;
  max-width: 360px;
  margin: 0;
}
.footer-col {
  font-size: 14px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  margin: 0 0 16px;
}
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.footer-col a,
.footer-col span {
  color: rgba(255,255,255,.66);
  transition: color .2s ease;
}
.footer-col a:hover {
  color: #fff;
}
.footer-note {
  color: rgba(255,255,255,.5);
  font-size: 13px;
  line-height: 1.9;
  border-left: 1px solid rgba(255,255,255,.2);
  padding-left: 16px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 20px;
  padding-bottom: 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 12px;
  color: rgba(255,255,255,.42);
}
.footer-bottom .domain {
  color: rgba(255,255,255,.68);
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease,transform .6s cubic-bezier(.22,.61,.36,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-panel {
    max-width: 620px;
  }
  .thread-grid {
    grid-template-columns: 1fr;
  }
  .qa-wrap {
    grid-template-columns: 1fr;
  }
  .footer-main {
    grid-template-columns: 1fr 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .header-main {
    min-height: 64px;
  }
  .brand-symbol {
    width: 40px;
    height: 40px;
  }
  .brand-cn {
    font-size: 19px;
  }
  .brand-en {
    display: none;
  }
  .channel-inner {
    overflow-x: auto;
    scrollbar-width: none;
  }
  .channel-nav {
    width: 100%;
  }
  .feature-item {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .feature-item--flip .feature-body {
    order: 2;
  }
  .feature-item--flip .feature-media {
    order: 1;
  }
  .thread-head {
    grid-template-columns: 1fr;
  }
  .qa-list {
    margin-top: 30px;
  }
  .footer-main {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .brand-cn {
    font-size: 18px;
  }
  .brand-en {
    display: none;
  }
  .header-actions .btn-sm {
    font-size: 13px;
    padding: 0 12px;
  }
  .security-hero {
    padding-top: 64px;
    padding-bottom: 48px;
  }
  .security-hero h1 {
    font-size: 2.2rem;
  }
  .hero-lead,
  .hero-desc {
    font-size: 15px;
  }
  .hero-panel {
    padding: 22px;
  }
  .section-head h2 {
    font-size: 1.8rem;
  }
  .feature-body p {
    font-size: 15px;
  }
  .feature-index {
    font-size: 14px;
  }
  .qa-item-button {
    font-size: 15px;
  }
  .contact-form-card {
    padding: 18px;
  }
}

@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;
  }
}